CN116557169B - Device and method for regulating and controlling working mode of rotary detonation engine by using plasma - Google Patents

Abstract

The present application provides a device and method for regulating the working mode of a rotating detonation engine by plasma, which relates to the field of engines. The device includes a burner, a plasma exciter and an igniter. The burner is provided with a combustion chamber and a first main road inlet and a second main road inlet connected with the combustion chamber. The plasma exciter and igniter are installed on the burner. The plasma exciter has an excitation chamber and a first inlet, a second inlet and a cracked gas outlet that are all connected with the excitation chamber; the first inlet is used to pass in the auxiliary oxidant, the second inlet is used to pass in the auxiliary fuel, and the cracked gas outlet is connected to the excitation chamber. The combustion chamber is connected; the plasma exciter is used to crack the mixed gas obtained by mixing the auxiliary oxidant and the auxiliary fuel in the excitation chamber, and the cracked gas formed by cracking is discharged into the combustion chamber from the cracked gas outlet. This device can actively control the operating mode of the rotating detonation engine from single wave to dual waves in the same direction and finally to multiple waves without changing the incoming flow conditions and equivalence ratio.

Description

Device and method for regulating operating mode of rotating detonation engine by plasma

Technical field

The present invention relates to the field of engines, and specifically to a device and method for controlling the working mode of a rotary detonation engine by plasma.

Background technique

The rotating detonation engine is a continuously pressurized combustion power plant. During operation, there are one or more detonation waves in the combustion chamber of the rotating detonation engine that move at high speed in the circumferential direction. When the fresh mixture is swept by the detonation waves, it undergoes a pressurized combustion reaction. Compared with power plants based on isobaric combustion, rotating detonation engines consume less fuel to produce the same thrust. Compared with other pressure gain combustion devices, the rotary detonation engine has a simple structure and a stable air flow at the cracked gas outlet of the combustion chamber. The working modes of the rotating detonation engine mainly include single-wave mode, double-wave co-directional mode, and multi-wave mode. The single-wave mode refers to the existence of a detonation wave that rotates in the circumferential direction in the rotating detonation combustion chamber. The two-wave co-directional mode means that there are two detonation waves propagating in the same direction in the detonation combustion chamber at the same time. Multi-wave mode refers to the presence of more than two detonation waves in the detonation combustion chamber at the same time.

During the research, the inventor found that the existing modal control of the rotating detonation engine has at least the following shortcomings:

The existing engine working mode control methods are mainly implemented by changing the equivalence ratio of the combustion chamber or changing the flow rate. Such working mode control methods will increase the engine's fuel consumption rate or increase engine resistance, deteriorating engine performance.

Contents of the invention

The object of the present invention is to provide a device and method for plasma regulating the operating mode of a rotating detonation engine, which can control the operating mode of the rotating detonation engine from single wave to The active control of dual waves in the same direction and finally multiple waves will not easily increase the fuel consumption rate of the engine or increase the engine resistance, and the engine performance is stable and reliable.

The embodiment of the present invention is implemented as follows:

In a first aspect, the present invention provides a device for plasma regulating the operating mode of a rotary detonation engine, including:

burners, plasma exciters and igniters;

The burner is provided with a combustion chamber and a first main road inlet and a second main road inlet that are both connected to the combustion chamber. The first main road inlet is used to pass into the main road fuel, and the second main road inlet is used to pass into the main road fuel. The inlet is used to access the main oxidant;

The plasma actuator is installed on the burner. The plasma actuator has an excitation chamber and a first inlet, a second inlet and a cracked gas outlet that are all connected with the excitation chamber; the first inlet is used for To introduce auxiliary oxidant, the second inlet is used to introduce auxiliary fuel, and the cracked gas outlet is connected with the combustion chamber; the plasma exciter is used to crack the auxiliary oxidant and auxiliary gas located in the excitation chamber. The mixed gas obtained by mixing the fuel, and the cracked gas formed by cracking is discharged from the cracked gas outlet into the combustion chamber;

The igniter is installed on the burner.

In an optional embodiment, the burner includes an outer cylinder and an inner cylinder, the outer cylinder is sleeved outside the inner cylinder, and the outer cylinder and the inner cylinder cooperate to define a second main path. Inlet and combustion chamber, the first main inlet is provided on the wall of the inner cylinder; the plasma exciter and the igniter are both installed on the outer cylinder.

In an optional embodiment, the outer cylinder includes a first outer equal diameter cylinder section, an outer reducing barrel section and a second outer equal diameter cylinder section connected in sequence, and the inner diameter of the first outer equal diameter cylinder section is less than The inner diameter of the second outer equal diameter cylinder section, the inner diameter of the outer variable diameter barrel section gradually increases from the first outer equal diameter barrel section to one end of the second outer equal diameter barrel section; the plasma The exciter is installed on the outer wall of the first outer equal diameter cylinder section; the igniter is installed on the outer wall of the second outer equal diameter cylinder section.

In an optional embodiment, an end of the first outer equal diameter cylinder section away from the outer reducing barrel section is provided with a first external connecting flange; an end of the second outer equal diameter cylinder section away from the outer reducing barrel section is provided with a first external connecting flange; One end of the outer reducing barrel section is provided with a second outer connecting flange.

In an optional embodiment, the inner cylinder includes a first inner constant diameter cylinder section, an inner reducing cylinder section and a second inner constant diameter cylinder section connected in sequence, and the inner diameter of the first inner constant diameter cylinder section is less than The inner diameter of the second inner constant diameter cylinder section, the inner diameter of the inner variable diameter cylinder section gradually increases from the first inner constant diameter cylinder section to one end of the second inner constant diameter cylinder section; the first inner constant diameter cylinder section The main inlet passes through the cylinder wall of the first inner constant diameter cylinder section.

In an optional embodiment, the number of the first main channel inlets is multiple, and the plurality of first main channel inlets are arranged at intervals in the circumferential direction of the first inner constant diameter cylinder section.

In an optional embodiment, an end of the first inner equal diameter cylinder section away from the inner reducing barrel section is provided with a first internal connecting flange; an end of the second inner equal diameter cylinder section away from the inner reducing barrel section is provided with a first internal connecting flange; One end of the inner reducing barrel section is provided with a second inner connecting flange.

In an optional embodiment, the first inner connecting flange is located in the cylinder cavity of the first inner equal diameter cylinder section, and the second inner connecting flange is located in the second inner equal diameter cylinder section. inside the cylinder cavity.

In an optional embodiment, the plasma exciter includes a conductor sleeve, an electrode and an insulating sleeve, the excitation chamber is formed inside the conductor sleeve, and the first inlet, the second inlet and the cracked gas outlet are all provided with on the conductor sleeve; the insulating sleeve is sleeved on the electrode, and the insulating sleeve is fixed on the conductor sleeve; the electrode has a first end and a second end, and the first end extends out of the The insulating sleeve is located in the excitation cavity, the second end is used to connect to the high-voltage end of the power supply, and the conductor sleeve is used to connect to the low-voltage end of the power supply.

In a second aspect, the present invention provides a method for controlling the operating mode of a rotary detonation engine by plasma, which is applicable to the device for regulating the operating mode of a rotary detonation engine by plasma according to any one of the preceding embodiments.

The beneficial effects of the embodiments of the present invention are:

To sum up, in the device for regulating the working mode of a rotary detonation engine by plasma provided in this embodiment, the plasma exciter and the first main road inlet are at the same axial position of the engine. The fuel forms a collision form, and the fuel is atomized and mixed more fully under the action of the incoming high-speed airflow, which makes the detonation wave propagate more stably in the combustion chamber, thereby providing a basis for engine operating mode control.

Specifically, by setting up a plasma exciter on the burner, when it is necessary to burn fuel, part of the auxiliary fuel and auxiliary oxidant are first introduced into the excitation chamber of the plasma exciter. In the excitation chamber, the auxiliary fuel and auxiliary oxidant are The oxidant is mixed and cracked under the action of the plasma actuator to form cracked gas. The cracked gas is introduced into the combustion chamber, mixed with the main path fuel and the main path oxidant, and then ignited by the igniter, thus forming a pyrolysis gas in the combustion chamber. One or more detonation waves moving at high speed in the circumferential direction. With this design, the auxiliary fuel is cracked after being excited by plasma, which improves the fuel activity. The improvement of fuel activity reduces the size of the detonation cell, making it easier to reach the critical filling height when the incoming flow conditions remain unchanged.

The smaller the cell size, the lower the critical filling height and the greater the number of detonation waves. That is to say, when there is less fuel flowing through the second inlet of the plasma actuator, the rotating detonation engine is in a single-wave mode; by increasing the fuel flowing through the second inlet of the plasma actuator, the rotating detonation engine can be The engine is adjusted to a two-wave co-directional mode; further increasing the fuel flowing through the second inlet of the plasma exciter can adjust the rotating detonation engine to a multi-wave mode.

By gradually increasing the fuel flowing through the plasma exciter and increasing the activity of the fuel entering the engine combustion chamber, the operating mode of the rotating detonation engine can be changed from single wave to double wave without changing the inflow conditions and equivalence ratio. The active control from the same direction to multiple waves is not easy to increase the fuel consumption rate of the engine, and it is not easy to increase the engine resistance. The engine performance is stable and reliable, the failure rate is low, the service life is long, and the operating cost is low.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a device for regulating the operating mode of a rotary detonation engine by plasma according to an embodiment of the present invention;

Figure 2 is a schematic cross-sectional structural view of a device for regulating the working mode of a rotary detonation engine by plasma according to an embodiment of the present invention;

Figure 3 is a schematic diagram of the partially enlarged structure corresponding to Figure 2.

icon:

100-burner; 101-combustion chamber; 102-first main road inlet; 103-second main road inlet; 104-mixed gas outlet; 110-outer cylinder; 111-first outer equal diameter cylinder section; 112-outer Reducing cylinder section; 113-second outer equal diameter cylinder section; 114-first external flange; 115-second external flange; 120-inner cylinder; 121-first inner equal diameter cylinder section; 122-inner variable diameter cylinder section diameter cylinder section; 123-the second inner constant diameter cylinder section; 124-the first internal flange; 125-the second internal flange; 200-plasma exciter; 201-excitation chamber; 202-the first inlet; 203-second inlet; 204-pyrolysis gas outlet; 210-conductor sleeve; 220-electrode; 221-first end; 222-second end; 230-insulation sleeve; 300-igniter.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters represent similar items in the following figures, therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is customarily placed when used. It is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply. The devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations of the invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions and shall not be understood as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical", etc. do not mean that the component is required to be absolutely horizontal or suspended, but may be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical". It does not mean that the structure must be completely horizontal, but can be slightly tilted.

In the description of the present invention, it should also be noted that, unless otherwise clearly stated and limited, the terms "set", "installation", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the existing technology, the mode control of the rotating detonation engine is mainly achieved by changing the equivalence ratio of the combustion chamber or changing the flow rate. However, such methods will increase the fuel consumption rate of the engine, increase the engine resistance, and deteriorate the engine performance, making The operating stability of the engine is poor, the failure rate is high, and the cost of inspection or repair is high.

In view of this, the designer provides a device for plasma control of the operating mode of the rotating detonation engine, which can control the operating mode of the rotating detonation engine from single wave to dual wave without changing the inflow conditions and equivalence ratio. Waves in the same direction eventually lead to active regulation of multiple waves.

Please refer to FIGS. 1 and 2 . In this embodiment, the device for controlling the operating mode of the rotary detonation engine by plasma includes a burner 100 , a plasma exciter 200 and an igniter 300 . The burner 100 is provided with a combustion chamber 101 and a first main road inlet 102 and a second main road inlet 103 that are both connected to the combustion chamber 101. The first main road inlet 102 is used to introduce main road fuel, and the second main road inlet 103 Used to pass into the main route oxidant. The plasma exciter 200 and the igniter 300 are both installed on the burner 100 . The plasma exciter 200 has an excitation chamber 201 and a first inlet 202, a second inlet 203 and a cracked gas outlet 204 that are all connected to the excitation chamber 201; the first inlet 202 is used to pass in the auxiliary oxidant, and the second inlet 203 is used to pass in the auxiliary oxidant. Enter the auxiliary fuel, and the cracked gas outlet 204 is connected with the combustion chamber 101; the plasma exciter 200 is used to crack the mixed gas obtained by mixing the auxiliary oxidant and the auxiliary fuel in the excitation chamber 201, and the cracked gas formed by cracking is ejected from the cracked gas outlet. 204 is discharged into the combustion chamber 101.

Based on the above, the working principle of the device for regulating the operating mode of the rotary detonation engine by plasma provided in this embodiment is as follows:

The first main road inlet 102 is connected to the intake pipe of the engine for transporting main road fuel. The main road fuel is introduced into the combustion chamber 101 through the first main road inlet 102. The second main road inlet 103 is connected to the main road oxidizer for the engine. The air intake device is connected, and the main path oxidizer is introduced into the combustion chamber 101 through the second main path inlet 103. At the same time, the auxiliary oxidant is introduced into the excitation chamber 201 through the first inlet 202, and the auxiliary fuel is introduced into the excitation chamber 201 through the second inlet 203. In the excitation chamber 201, the auxiliary oxidant and the auxiliary fuel are cracked to form cracked gas, and the cracked gas is The cracked gas outlet 204 enters the combustion chamber 101. At this point, the main path fuel, the main path oxidant and the cracked gas are mixed to form a mixed gas. Then, the igniter 300 is started to ignite, causing the mixed gas to burn, forming one or more detonation waves in the combustion chamber 101 that move at high speed in the circumferential direction of the combustion chamber 101 .

In this design, the auxiliary fuel is cracked after being excited by plasma, which improves the fuel activity. The fuel activity is a key factor affecting the working mode of the rotating detonation engine. The improvement of the fuel activity reduces the detonation cell size. In the future, It is easier to reach the critical filling height when the flow conditions remain unchanged. The smaller the cell size, the lower the critical filling height and the greater the number of detonation waves.

That is to say, when there is less fuel flowing through the second inlet 203 of the plasma actuator 200, the fuel activity in the combustion chamber 101 is low, and the rotating detonation engine is in a single wave mode; by increasing the flow through the plasma actuator The fuel in the second inlet 203 of the plasma exciter 200 increases the fuel activity in the combustion chamber 101 and can adjust the rotating detonation engine to a two-wave co-directional mode; further increasing the fuel flowing through the second inlet 203 of the plasma exciter 200, Further increasing the fuel activity in the combustion chamber 101 enables the rotating detonation engine to be adjusted to a multi-wave mode. Therefore, by gradually increasing the fuel flowing through the plasma actuator 200 and increasing the activity of the fuel entering the engine combustion chamber, it is possible to change the operating mode of the rotating detonation engine from a single wave without changing the inflow conditions and equivalence ratio. The active control from dual waves in the same direction to multiple waves is not easy to increase the engine's fuel consumption rate and engine resistance. The engine performance is stable and reliable, the failure rate is low, the service life is long, and the operating cost is low.

The following examples illustrate the detailed structure of the device for regulating the operating mode of a rotary detonation engine by plasma provided in this application.

In this embodiment, optionally, the burner 100 includes an outer cylinder 110 and an inner cylinder 120 . The outer cylinder 110 is sleeved on the inner cylinder 120. The outer cylinder 110 and the inner cylinder 120 cooperate to define a second main path inlet 103, a mixture outlet 104 and a combustion chamber 101. The second main path inlet 103 and the mixture outlet 104 are respectively located at both ends of the combustion chamber 101. The first main inlet 102 is located on the wall of the inner cylinder 120; the plasma exciter 200 and the igniter 300 are both installed on the outer cylinder 110.

Please combine FIG. 1 and FIG. 2 . Optionally, the cross-sectional profile of the outer cylinder 110 is set to a circular ring shape, where the cross-section is a plane perpendicular to the axis of the outer cylinder 110 . The outer cylinder 110 includes a first outer constant diameter cylinder section 111, an outer reducing cylinder section 112 and a second outer equal diameter cylinder section 113, which are connected in sequence. The outer constant diameter cylinder section 113 can be configured as an integrated structure, which is easy to process and manufacture, and the overall structure has high strength and high safety in use. The inner diameter of the outer variable diameter cylinder section 112 gradually increases from one end of the first outer equal diameter cylinder section 111 to the second outer equal diameter cylinder section 113, and the inner diameter of the first outer equal diameter cylinder section 111 is smaller than the second outer equal diameter cylinder section 111. The inner diameter of the section 113, one end of the first outer equal diameter cylinder section 111 is connected with the small end of the outer reducing barrel section 112, and the other end of the first outer equal diameter cylinder section 111 is provided with an everted first external flange 114; One end of the second outer equal diameter cylinder section 113 is connected with the large end of the second outer reducing barrel section 112 , and the other end of the second outer equal diameter cylinder section 113 is provided with an everted second external flange 115 . The first outer constant diameter cylinder section 111, the outer reducing cylinder section 112 and the second outer constant diameter cylinder section 113 are coaxially arranged. The plasma actuator 200 is installed on the outer wall of the first outer equal diameter cylinder section 111 , and the igniter 300 is installed on the outer wall of the second outer equal diameter cylinder section 113 .

At the same time, a first assembly hole is provided on the cylinder wall of the first outer constant diameter cylinder section 111, and the cracked gas outlet 204 of the plasma actuator 200 for discharging cracked gas enters the combustion chamber 101 from the first assembly hole. A second assembly hole is provided on the barrel wall of the second outer equal diameter barrel section 113, and the igniter 300 is installed at the second assembly hole to facilitate ignition of the mixer in the combustion chamber 101.

Optionally, the cross-sectional profile of the inner cylinder 120 is set to a circular ring shape, wherein the cross-section is a plane perpendicular to the axis of the inner cylinder 120 . The inner cylinder 120 includes a first inner constant diameter cylinder section 121, an inner reducing cylinder section 122 and a second inner constant diameter cylinder section 123, which are connected in sequence. The inner constant diameter cylinder section 123 can be configured as an integrated structure, which is easy to process and manufacture, and the overall structure has high strength and high safety in use. The inner diameter of the inner variable diameter cylinder section 122 gradually increases from the first inner constant diameter cylinder section 121 to one end of the second inner equal diameter cylinder section 123, and the inner diameter of the first inner constant diameter cylinder section 121 is smaller than the second inner equal diameter cylinder section 123. The inner diameter of the section 123, one end of the first inner equal diameter cylinder section 121 is connected with the small end of the inner reducing barrel section 122, and the other end of the first inner equal diameter cylinder section 121 is provided with an inverted first internal flange 124 ; One end of the second inner equal diameter cylinder section 123 is connected with the large end of the second inner variable diameter cylinder section 122, and the other end of the second inner equal diameter cylinder section 123 is provided with an inverted second internal flange 125. That is, the first internal flange 124 and the second external flange 115 do not extend into the combustion chamber 101 and will not block the gas flow of the second main path inlet 103 and the mixed gas outlet 104 . The first inner constant diameter cylinder section 121, the inner reducing cylinder section 122 and the second inner constant diameter cylinder section 123 are coaxially arranged. The first inner constant diameter cylinder section 121 corresponds to the first outer equal diameter cylinder section 111. The annular opening defined between them is the second main channel inlet 103; the inner reducing cylinder section 122 corresponds to the outer reducing cylinder section 112; the second inner equal diameter cylinder section 123 corresponds to the second outer equal diameter barrel section 113, The annular opening defined between the two is the mixture outlet 104. When the mixture flows from the position corresponding to the first inner constant diameter cylinder section 121 to the position corresponding to the second inner constant diameter cylinder section 123 in the combustion chamber 101, it has a pressure expansion effect when flowing through the inner variable diameter cylinder section 122. The first main channel inlet 102 is provided on the first inner constant diameter cylinder section 121, and the number of the first main channel inlet 102 can be multiple. The multiple first main channel inlets 102 are located on the first inner constant diameter cylinder section 121. Evenly spaced in the circumferential direction. Furthermore, one of the plurality of first main channel inlets 102 is coaxially arranged with the cracked gas outlet 204 . During assembly, the pipe for transporting main fuel is connected to the first main inlet 102 , thereby inputting the main fuel into the combustion chamber 101 .

Please combine FIG. 2 and FIG. 3 . In this embodiment, optionally, the plasma actuator 200 includes a conductor sleeve 210 , an electrode 220 and an insulating sleeve 230 . The conductor sleeve 210 is made of metal material and has a conductive effect. The conductor sleeve 210 can have a cylindrical structure. One end of the conductor sleeve 210 is closed, and the other end is provided with a cracked gas outlet 204. The conductor sleeve 210 has an end of the cracked gas outlet 204. It is plugged into the first assembly hole to realize connection with the burner 100 . An excitation cavity 201 is formed inside the conductor sleeve 210 , and the first inlet 202 and the second inlet 203 are both located on the peripheral wall of the conductor sleeve 210 . The insulating sleeve 230 is sleeved on the outside of the electrode 220, and is fixed on the closed end of the conductor sleeve 210. The insulating sleeve 230 blocks the conductor sleeve 210 and the electrode 220. The electrode 220 has a cylindrical structure. The electrode 220 has a first end 221 and a second end 222. The first end 221 extends out of the insulating sleeve 230 and is located in the excitation chamber 201. The second end 222 is used to connect to the high-voltage end of the power supply. The conductor The sleeve 210 is used to connect with the low voltage end of the power supply. When the plasma actuator 200 is working, the auxiliary fuel enters the excitation chamber 201 through the second inlet 203, and the auxiliary oxidant enters the excitation chamber 201 through the first inlet 202. The auxiliary fuel and the auxiliary oxidant form a mixture in the excitation chamber 201 . When the power is turned on, the air between the electrode 220 and the conductor sleeve 210 is broken down, forming plasma excitation. Plasma excitation cracks the mixed gas to form cracked gas. The cracked gas enters the combustion chamber 101 through the cracked gas outlet 204 of the plasma actuator 200 .

The plasma control device for regulating the working mode of the rotary detonation engine provided in this embodiment can realize the working mode by adjusting the amount of active fuel entering the combustion chamber 101 while keeping the equivalence ratio or flow rate of the combustion chamber 101 unchanged. The adjustment is flexible and reliable, and will not easily affect the working performance of the engine. The engine failure rate is low and the operating life is long.

This embodiment also provides a method for controlling the working mode of a rotary detonation engine by plasma, which is suitable for the above-mentioned device for regulating the working mode of a rotary detonation engine by plasma, and is realized by adjusting the amount of active fuel entering the combustion chamber 101 The adjustment of the working mode is convenient and reliable, and will not easily affect the working performance of the engine.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A device for controlling the working mode of a rotary detonation engine by plasma, comprising:

a burner, a plasma exciter and an igniter;

the burner is provided with a combustion chamber, a first main path inlet and a second main path inlet which are communicated with the combustion chamber, wherein the first main path inlet is used for introducing main path fuel, and the second main path inlet is used for introducing main path oxidant;

the plasma exciter is arranged on the burner and is provided with an exciting cavity, a first inlet, a second inlet and a pyrolysis gas outlet, wherein the first inlet, the second inlet and the pyrolysis gas outlet are all communicated with the exciting cavity; the first inlet is used for introducing auxiliary oxidant, the second inlet is used for introducing auxiliary fuel, and the pyrolysis gas outlet is communicated with the combustion chamber; the plasma exciter is used for cracking mixed gas which is positioned in the excitation cavity and is obtained by mixing auxiliary oxidant and auxiliary fuel, and cracked gas formed by cracking is discharged into the combustion cavity from the cracked gas outlet; when the auxiliary fuel is excited by the plasma exciter, the activity of the auxiliary fuel is improved, the size of knocking cells is reduced, and the number of detonation waves is increased; the activity of fuel entering the combustion chamber of the engine is improved by gradually increasing auxiliary fuel flowing through the plasma exciter, and the active regulation and control of the working mode of the rotary knocking engine from single wave to double wave in the same direction and finally to multiple waves is realized under the condition that the incoming flow condition and the equivalence ratio are not changed;

the igniter is mounted to the burner.

2. The apparatus for plasma-regulating the mode of operation of a rotary detonation engine of claim 1, wherein:

the burner comprises an outer cylinder and an inner cylinder, the outer cylinder is sleeved outside the inner cylinder, a second main path inlet and a combustion cavity are defined by the outer cylinder and the inner cylinder in a matching way, and the first main path inlet is arranged on the wall of the inner cylinder; the plasma exciter and the igniter are both arranged on the outer cylinder.

3. The apparatus for plasma-regulating the mode of operation of a rotary detonation engine of claim 2, wherein:

the outer cylinder comprises a first outer equal-diameter cylinder section, an outer variable-diameter cylinder section and a second outer equal-diameter cylinder section which are sequentially connected, wherein the inner diameter of the first outer equal-diameter cylinder section is smaller than that of the second outer equal-diameter cylinder section, and the inner diameter of the outer variable-diameter cylinder section gradually increases from the first outer equal-diameter cylinder section to one end of the second outer equal-diameter cylinder section; the plasma exciter is arranged on the outer wall of the first outer constant-diameter cylinder section; the igniter is mounted on the outer wall of the second outer constant diameter barrel section.

4. A device for controlling the working mode of a rotary detonation engine by using plasma according to claim 3, wherein:

one end of the first outer constant diameter cylinder section, which is far away from the outer variable diameter cylinder section, is provided with a first outer connecting flange; and one end of the second outer constant diameter cylinder section, which is far away from the outer variable diameter cylinder section, is provided with a second outer connecting flange.

5. The apparatus for plasma-regulating the mode of operation of a rotary detonation engine of claim 2, wherein:

the inner barrel comprises a first inner constant-diameter barrel section, an inner variable-diameter barrel section and a second inner constant-diameter barrel section which are sequentially connected, wherein the inner diameter of the first inner constant-diameter barrel section is smaller than that of the second inner constant-diameter barrel section, and the inner diameter of the inner variable-diameter barrel section gradually increases from the first inner constant-diameter barrel section to one end of the second inner constant-diameter barrel section; the first main path inlet penetrates through the wall of the first inner constant-diameter barrel section.

6. The apparatus for plasma-regulating the mode of operation of a rotary detonation engine of claim 5, wherein:

the number of the first main path inlets is multiple, and the multiple first main path inlets are arranged at intervals in the circumferential direction of the first inner equal-diameter cylinder section.

7. The apparatus for plasma-regulating the mode of operation of a rotary detonation engine of claim 5, wherein:

one end of the first inner constant diameter cylinder section, which is far away from the inner variable diameter cylinder section, is provided with a first inner connecting flange; and one end of the second inner constant diameter cylinder section, which is far away from the inner variable diameter cylinder section, is provided with a second inner connecting flange.

8. The apparatus for plasma-regulating the mode of operation of a rotary detonation engine of claim 7, wherein:

the first internal connection flange is positioned in the cylinder cavity of the first internal constant-diameter cylinder section, and the second internal connection flange is positioned in the cylinder cavity of the second internal constant-diameter cylinder section.

9. The apparatus of any one of claims 1-8, wherein the apparatus is configured to control an operating mode of a rotary detonation engine:

the plasma exciter comprises a conductor sleeve, an electrode and an insulating sleeve, wherein an excitation cavity is formed in the conductor sleeve, and the first inlet, the second inlet and the pyrolysis gas outlet are all formed in the conductor sleeve; the insulating sleeve is sleeved outside the electrode, and the insulating sleeve is fixed on the conductor sleeve; the electrode has a first end and a second end, the first end stretches out of the insulating sleeve and is positioned in the excitation cavity, the second end is used for being connected with the high-voltage end of the power supply, and the conductor sleeve is used for being connected with the low-voltage end of the power supply.

10. A method for controlling the working mode of a rotary knock engine by using plasma, which is characterized by being suitable for a device for controlling the working mode of the rotary knock engine by using the plasma according to any one of claims 1 to 9.