CN118481869B - Supersonic speed air inlet flow field active flow control structure based on mixed synthetic jet - Google Patents
Supersonic speed air inlet flow field active flow control structure based on mixed synthetic jet Download PDFInfo
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- CN118481869B CN118481869B CN202410722055.7A CN202410722055A CN118481869B CN 118481869 B CN118481869 B CN 118481869B CN 202410722055 A CN202410722055 A CN 202410722055A CN 118481869 B CN118481869 B CN 118481869B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
- F02K7/10—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof characterised by having ram-action compression, i.e. aero-thermo-dynamic-ducts or ram-jet engines
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses an active flow control structure of a supersonic inlet flow field based on mixed synthetic jet, which belongs to the field of hypersonic inlet channels and comprises a synthetic jet vibration membrane array unit, an upstream synthetic jet generation channel, a downstream synthetic jet generation channel and a pulse valve communication module, wherein the upstream synthetic jet enters a jetting stroke, vortex pairs are formed in a self-coupling mode, momentum is provided linearly, the downstream synthetic jet is in an opposite suction stroke, a reflux vortex of a boundary layer is sucked into a downstream synthetic jet cavity, a wall boundary layer is separated in an accelerating way, low-pressure fluid on the wall surface is sucked into the cavity along with the upstream synthetic jet entering the suction stroke to weaken the reverse pressure gradient of the wall surface, the downstream synthetic jet periodically communicates the upstream synthetic jet generation channel with the downstream synthetic jet generation channel through injecting energy into the downstream boundary layer, and a pulse stop valve periodically opens and closes the pulse jet formed under the induction of pressure difference of two sides, so that the influence of the working efficiency of the synthetic jet is weakened at the same time when the turbulence and the speed pulsation of fluid are increased.
Description
Technical Field
The invention belongs to the field of hypersonic air inlets, and relates to an active flow control structure of a flow field of a hypersonic air inlet based on mixed synthetic jet flow, in particular to an active flow control method of the flow field of the hypersonic air inlet based on mixed synthetic jet flow.
Background
The operating characteristics of the supersonic inlet directly determine the overall efficiency of the ramjet. In order to solve the problems of reduced total pressure recovery coefficient, reduced performance of the air inlet and even no starting caused by flow separation of low-energy flow of the boundary layer induced by the disturbance of the shock wave boundary layer, researchers adopt a series of auxiliary flow control technical schemes such as variable geometry, vortex generators, deflation, active excitation and the like to improve the stability and the performance of the supersonic air inlet.
The Chinese patent (patent number: CN 117927381A) discloses a lip cover and throat double-stage continuously adjustable wide-speed domain hypersonic inlet channel, a control method and a design method thereof, which are characterized in that the throat area is skillfully and indirectly controlled through a rotating arm, and the capturing area is controlled through translating the lip cover to realize better starting performance and air inlet index, but the device has the defect of complex geometric structure.
Chinese patent (patent number: CN 110985208B) discloses an inward rotating air inlet channel assembly based on a plasma vortex generator, which promotes momentum exchange of low-energy flow in a main flow and a boundary layer by a flow vortex formed by interaction of a plasma jet and free incoming flow, enhances the capability of a reverse pressure gradient resistance of the boundary layer, and further has a certain delay or inhibition effect on a shock wave/boundary layer interference separation area induced by a downstream compression surface, but has the defect that the vortex generator in the device is easy to damage.
Chinese patent (CN 107091158B) discloses a low external resistance hypersonic air inlet channel and a shock boundary layer interference control method, wherein a two-dimensional bulge is arranged at an inlet of the air inlet channel, a local air discharge slot/hole array is arranged at a concave part of a windward side and a leeward side, and the optimal control capability of boundary layer separation caused by lip cover shock wave/boundary layer interference is realized by controlling opening and closing of two air discharge subchambers below the bulge, but the defect is that the bulge in the device has poor effect in a wide speed range.
The ability to self-regulate is limited due to drawbacks of conventional control methods such as complex geometry of the variable geometry, vortex generators being easily destroyed, bleed loss capturing flow being severe and potential, bulge being less effective in the wide speed range. In recent years, for example, a particle throwing method with advantages of relaxation effect and thermal protection, a novel control technical scheme such as synthetic jet with zero mass flow characteristics, a flexible wall surface with pressure oscillation and the like further improves the working performance of a propulsion system, but the method rarely relates to integration and compatibility of different technical schemes, and more auxiliary flow control technologies are necessary to explore to improve the stability and performance of a supersonic inlet.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an active flow control structure of a supersonic speed air inlet flow field based on mixed synthetic jet, which utilizes the periodic blowing and suction effect of the mixed jet formed by the synthetic jet induced by a vibrating diaphragm and a pulse jet driven by pressure difference to destroy the vortex system of an air inlet surface separation bag and inhibit the separation of a boundary layer, wherein the synthetic jet vibrating diaphragm injects vortex quantity and energy into the boundary layer on the wall surface by changing the frequency and amplitude, and the pulsating jet realizes the pressure difference regulation of an upstream and a downstream synthetic jet generating channels by changing the frequency so as to efficiently control the air inlet efficiency of the supersonic speed air inlet.
The invention has the technical scheme that the supersonic speed air inlet flow field active flow control structure based on mixed synthetic jet comprises a synthetic jet vibration membrane array unit, an upstream synthetic jet generation pipeline, a downstream synthetic jet generation channel and a pulse valve communication module;
the synthetic jet vibration membrane array unit is arranged between an upstream synthetic jet generation pipeline and a downstream synthetic jet generation channel, and the arrangement direction of the synthetic jet vibration membrane array unit is parallel to the horizontal direction;
The pulse valve communication module is arranged between the upstream synthetic jet generation pipeline and the downstream synthetic jet generation pipeline, and divides the fluid channel into the upstream synthetic jet generation pipeline and the downstream synthetic jet generation channel together with the synthetic jet vibration membrane array unit.
Further, the upstream synthetic jet flow generating pipeline and the downstream synthetic jet flow generating channel share the same synthetic jet flow vibrating membrane array unit, and the two sides of the synthetic jet flow vibrating membrane array unit are respectively corresponding to the front side and the back side of the synthetic jet flow vibrating membrane array unit.
Further, the synthetic jet vibration membrane array unit is composed of a plurality of independent vibration membrane units which are arranged in parallel in a single row or a plurality of rows, and a metal substrate is arranged on one side of each of the independent vibration membrane units.
Furthermore, the independent vibrating diaphragm units are driven by electromagnetic or piezoelectric, and generate reciprocating motion under the action of electric signals input from two ends, and the reciprocating motion is controlled by a signal generator and a power amplifier which are connected with the independent vibrating diaphragm units (the electric signals are loaded through the signal generator and the power amplifier, and the diaphragm generates periodic reciprocating vibration by utilizing electromagnetic or piezoelectric effect).
Further, the upstream synthetic jet flow generating pipeline is a cavity with a hole, and comprises an upstream synthetic jet flow generating pipeline diversion channel and an upstream synthetic jet flow hollow cavity with one end provided with a synthetic jet flow vibration membrane array unit;
The downstream synthetic jet flow generating channel is also a cavity with a hole, which comprises a downstream synthetic jet flow generating pipeline diversion channel and a downstream synthetic jet flow hollow cavity,
One end of the upstream synthetic jet hollow cavity and one end of the downstream synthetic jet hollow cavity are connected with the synthetic jet vibration membrane array unit;
The device comprises an upstream synthetic jet hollow cavity, a downstream synthetic jet hollow cavity, a synthetic jet vibration diaphragm unit, a gas inlet and a gas outlet, wherein the upstream synthetic jet hollow cavity and one end of the downstream synthetic jet hollow cavity are connected through the synthetic jet vibration diaphragm unit, the single gas inlet and the single gas outlet are sucked into or discharged out of the cavity through an upstream synthetic jet flow diversion channel, other wall surfaces are kept airtight with the outside, and the cavity is buried in an air inlet channel and does not exceed the size of the air inlet channel;
the upstream synthetic jet flow generating pipeline flow guide channel and the downstream synthetic jet flow generating pipeline flow guide channel are in a certain angle with the wall surface of the air inlet channel, one end of the flow guide channel is connected with the wall surface of the air inlet channel in a slit shape, and is arranged at a position near the upstream of boundary layer separation, and the other end of the flow guide channel is connected with the synthetic jet flow containing cavity.
Further, one end of the upstream synthetic jet flow generating pipeline diversion channel and one end of the downstream synthetic jet flow generating pipeline diversion channel are in a slit shape, are connected with the wall surface of the arranged air inlet channel, are arranged at the position near the upstream of boundary layer separation and reattachment, and the other end of the upstream synthetic jet flow generating pipeline diversion channel and the other end of the downstream synthetic jet flow generating pipeline diversion channel are connected with the synthetic jet flow containing cavity;
the end of the upstream synthetic jet hollow cavity opposite to the downstream synthetic jet hollow cavity comprises the other vibration surface of the synthetic jet vibration membrane array unit.
Further, the pulse valve communication module comprises a pulse valve core and a pulse valve actuating component which are connected with each other;
the pulse valve communication module connects or isolates the upstream synthetic jet flow generation pipeline and the downstream synthetic jet flow generation channel through periodically opening or closing the channels;
When the pulse valve communication module is opened, the pressure difference at two sides drives the fluid at the low pressure side to form pulse jet in the pipeline while the upstream synthetic jet generation pipeline and the downstream synthetic jet generation channel are connected;
When the pulse valve communication module is closed, the only gas inlet and outlet of the synthetic jet vibration diaphragm array unit are sucked into or discharged from the cavity through the slit outlet of the synthetic jet diversion channel, other wall surfaces are kept airtight with the outside, and the cavity is buried in the air inlet channel and does not exceed the size of the air inlet channel.
Further, the synthetic jet vibration membrane array unit adopts electromagnetic driving or piezoelectric driving.
Furthermore, the two sides of the independent vibrating diaphragm units are respectively provided with vibrating diaphragm connecting parts, the vibrating diaphragm connecting parts are distributed at equal intervals, the arrangement direction of the vibrating diaphragm connecting parts is parallel to the horizontal direction, and the vibrating diaphragm connecting parts are adhered or riveted and fixed on the metal substrates of the array.
Furthermore, the pulse valve communication module adopts electromagnetic drive or piston drive (piston drive or electromagnetic drive), and is communicated with and separates an upstream synthetic jet flow generation pipeline from a downstream synthetic jet flow generation channel through periodical opening and closing, and utilizes differential pressure on two sides to induce generation of pulse jet flow and increase turbulence degree and speed pulsation of fluid in the channel, and the frequency of the pulse jet flow is actively regulated according to the separation degree of a wall boundary layer and the action effect of the synthetic jet flow.
The invention has the beneficial effects that the mixed jet formed by the synthetic jet induced by the vibrating diaphragm and the pulse jet driven by the pressure difference has zero mass input characteristic, no external mass flow input is needed, and the self-excitation characteristic is obvious; the device adopts a pulse valve to periodically open and close, and effectively solves the problem of unbalanced ballast of the synthetic jet of the two-side channels by communicating and separating the upstream and downstream generation channels, and simultaneously utilizes the differential pressure of the two sides to induce the generation of pulse jet to increase the turbulence and speed pulsation of fluid in the channels so as to effectively improve jet energy, and can effectively utilize vibration energy when the synthetic jet membrane periodically vibrates in a reciprocating manner, the upstream and downstream channels on the two sides can obtain benefits, namely, when the membrane moves to one side to cause the reduction of the volume of a hollow cavity on one side to blow a high-energy vortex ring string outside the channels, high-energy fluid is injected into an auxiliary surface layer, meanwhile, the volume of the hollow cavity on the other channel is increased, the low-energy auxiliary surface layer is sucked into the hollow cavity on the other side, then linear momentum is transferred to the absorbed low-energy fluid and high-energy is discharged through a slit nozzle when the synthetic jet membrane moves reversely, the synthetic jet vibration membrane can inject vortex quantity and energy to the boundary layer on the wall surface by changing frequency, and the pulsation jet realizes the differential pressure regulation of the upstream synthetic jet generation channels by changing frequency so as to be beneficial to eliminate the influence of ballast, improve the working efficiency of the synthetic jet, and enhance the total recovery coefficient of the flow separation performance of the mixed synthetic jet device by absorbing the low-energy auxiliary surface layer and enhancing the absorption coefficient of the fluid, the invention utilizes the mixed jet formed by the synthetic jet induced by the vibrating diaphragm and the pulse jet driven by the pressure difference to improve the energy of the hypersonic flow field boundary layer, realizes effective inhibition of flow separation, and has the advantages of low energy consumption, high efficiency, electric drive and control, light weight, low cost, easy maintenance and the like.
Drawings
FIG. 1 is a schematic view of an apparatus of the present invention;
FIG. 2 is a side view of the device of the present invention;
FIG. 3 is a detailed view of an active control module of the present invention;
FIG. 4 is a basic schematic diagram of a pulse valve module employing electromagnetic actuation in accordance with the present invention;
FIG. 5 is a basic schematic diagram of a pulse valve module employing piston actuation in accordance with the present invention;
FIG. 6 is a schematic view of a slit outlet assembly of the apparatus of the present invention;
FIG. 7 is a schematic diagram of a synthetic jet vibrating diaphragm array element assembly in accordance with the present invention;
FIG. 8 is a simplified diagram of the working principle of the invention for upstream channel suction and downstream channel blowing;
FIG. 9 is a simplified diagram of the working principle of the invention for upstream channel suction and downstream channel blowing;
FIG. 10 is a simplified diagram of the operation principle of the pulse valve of the present invention when opened;
In the figure, 1 is a synthetic jet vibration membrane array unit, 11 is an independent vibration membrane unit, 12 is a vibration membrane connecting component, and 13 is a metal substrate;
2 is an upstream synthetic jet flow generating pipeline, 21 is a diversion channel of the upstream synthetic jet flow generating pipeline, and 22 is an upstream synthetic jet flow hollow cavity;
3 is a downstream synthetic jet flow generation channel, 31 is a downstream synthetic jet flow generation pipeline diversion channel, and 32 is a downstream synthetic jet flow hollow cavity;
reference numeral 4 denotes a pulse valve communication module, 41 denotes a pulse valve spool, and 44 denotes a pulse valve actuating member.
Detailed Description
The following describes the specific technical scheme of the present invention in further detail with reference to specific examples.
As shown in the figure, the supersonic speed air inlet flow field active flow control structure based on mixed synthetic jet comprises a synthetic jet vibration membrane array unit 1, an upstream synthetic jet generation pipeline 2, a downstream synthetic jet generation channel 3 and a pulse valve communication module 4;
The synthetic jet vibration diaphragm array unit 1 consists of a plurality of independent vibration diaphragm units 11 which are arranged in parallel in a single row or a plurality of rows, and the synthetic jet vibration diaphragm array unit 1 is arranged between an upstream synthetic jet generation pipeline 2 and a downstream synthetic jet generation channel 3, and the arrangement direction of the synthetic jet vibration diaphragm array unit is parallel to the horizontal direction.
Further, the independent vibrating diaphragm unit 11 generates reciprocating motion under the action of the electric signals inputted from both ends, and is controlled by a signal generator and a power amplifier connected thereto.
Further, the upstream synthetic jet flow generating pipeline 2 is a cavity with a hole, and comprises an upstream synthetic jet flow generating pipeline diversion channel 21 and an upstream synthetic jet flow hollow cavity 22, one end of which is provided with the synthetic jet flow vibration membrane array unit 1;
The downstream synthetic jet flow generating channel 3 is also a cavity with a hole, and comprises a downstream synthetic jet flow generating pipeline diversion channel 31 and a downstream synthetic jet flow hollow cavity 32.
Further, one end of the hollow cavity comprises the other vibration surface of the synthetic jet vibration membrane array unit 1.
Further, the upstream synthetic jet flow generating pipeline 2 and the downstream synthetic jet flow generating channel 3 share the same synthetic jet flow vibrating membrane array unit 1, and the front side and the back side of the synthetic jet flow vibrating membrane array unit 1 are corresponding;
The pulse valve communication module 4 includes a pulse valve spool 41 and a pulse valve actuating member 42 disposed between the upstream synthetic jet generation conduit 2 and the downstream synthetic jet generation conduit 3, which divide the fluid passage into the upstream synthetic jet generation conduit 2 and the downstream synthetic jet generation conduit 3 in conjunction with the synthetic jet vibrating diaphragm array unit 1.
The pulse valve communication module 4 connects or isolates the upstream synthetic jet generation conduit 2 and the downstream synthetic jet generation conduit 3 by periodically opening or closing the channels.
Furthermore, when the pulse valve communication module 4 is opened, the pressure difference at two sides drives the fluid at the low pressure side to form pulse jet in the pipeline while the upstream synthetic jet generation pipeline 2 and the downstream synthetic jet generation channel 3 are connected, specifically speaking, the synthetic jet vibration membrane array unit 1 injects vortex quantity and energy into the wall boundary layer by changing the frequency and the amplitude, and the pulsating jet realizes the pressure difference regulation of the upstream synthetic jet generation channel and the downstream synthetic jet generation channel by changing the frequency, thereby being beneficial to eliminating the influence of ballast and improving the working efficiency of the synthetic jet;
The mixed synthetic jet device eliminates flow separation by absorbing the low-energy boundary layer and enhances injection of high-energy fluid into the boundary layer by intracavity excitation, so that the performance of the air inlet channel is improved by inhibiting separation, and the improvement of the total pressure recovery coefficient is facilitated.
In the embodiment, the pulse valve communication module 4 is realized by adopting electromagnetic drive or piston motion and comprises a pulse valve core 41 and a left electromagnetic drive device, wherein the pulse valve core 41 is directly fixed on a movable iron core, and the fixed iron core at the other end is connected with the movable iron core through a spring;
the pulse valve actuating component 42 generates reciprocating motion under the electromagnetic effect of peripheral coil current and comprises a pulse valve core 41 and a left crank link mechanism, wherein the pulse valve core 41 generates reciprocating motion under the drive of the crank link mechanism.
In an embodiment, the slit outlet of the upstream synthetic jet generation conduit diversion channel 21 and the slit outlet of the downstream synthetic jet generation conduit diversion channel 31 are arranged in parallel.
Further, the upstream synthetic jet hollow cavity 22 and the downstream synthetic jet hollow cavity 22 have a parallelepiped structure.
In an embodiment, the synthetic jet vibration membrane array unit 1 adopts electromagnetic driving or piezoelectric driving.
Further, the electromagnetic driving is consistent with the basic principle of electromagnetic driving in the pulse valve communication module 4.
Furthermore, in the piezoelectric driving mode, the piezoelectric ceramic membrane generates vibration under the piezoelectric effect by loading voltage on the positive electrode and the negative electrode of the piezoelectric ceramic membrane.
In the embodiment, the synthetic jet vibration membrane array unit 1 comprises an independent vibration membrane unit 11, a vibration membrane connecting part 12 and a metal substrate 13, preferably, vibration membranes are arranged on two sides of the synthetic jet vibration membrane array unit 1, and the vibration membrane connecting part 12 is fixed on the array metal substrate through bonding or riveting in an equidistant arrangement mode.
In the embodiment, vibration energy can be effectively utilized when the synthetic jet vibration membrane array unit 1 periodically vibrates in a reciprocating manner, both upstream and downstream channels on two sides of the vibration membrane array unit can obtain benefits, and when the synthetic jet vibration membrane array unit 1 extrudes towards the upstream synthetic jet hollow cavity 22, the volume of the upstream synthetic jet hollow cavity 22 is reduced.
Further, under the shearing action, the fluid in the upstream synthetic jet hollow cavity 22 blows a high-energy vortex ring string to the outside of the channel through the slit outlet of the upstream synthetic jet generation pipeline diversion channel 21, and high-energy fluid is injected into the boundary layer, meanwhile, the extrusion of the synthetic jet vibration membrane array unit 1 to the upstream synthetic jet hollow cavity 22 side also corresponds to the expansion of the downstream synthetic jet hollow cavity 32 side, the volume of the downstream synthetic jet hollow cavity 32 is increased, and the low-energy boundary layer is sucked into the downstream synthetic jet hollow cavity 32 through the slit outlet of the downstream synthetic jet diversion channel 31.
Further, as the diaphragm reciprocates, when the synthetic jet vibration diaphragm array unit 1 is pressed toward the downstream synthetic jet hollow accommodating chamber 32 side in the reverse direction, the vibration in the downstream synthetic jet hollow accommodating chamber 32 at this time transmits the linear momentum to the absorbed low-energy fluid and is discharged through the slit outlet of the downstream synthetic jet generating conduit guide passage 31.
In an embodiment, when the pulse valve core 41 is in the open state, the upstream synthetic jet hollow cavity 22 and the downstream synthetic jet hollow cavity 32 which are originally separated are directly communicated, and the pressure difference between two sides induces to generate a pulse jet to increase the turbulence and the speed pulsation of the fluid in the channel, so that the jet energy is effectively improved.
Further, the upstream synthetic jet generation conduit 2 and the downstream synthetic jet generation channel 3 are ballast balanced.
Further, the synthetic jet vibration membrane array unit 1 injects vorticity and energy into the wall boundary layer by changing frequency and amplitude.
Further, the pulse valve communication module 4 changes the frequency to generate pulse jet flows with different frequencies, and regulates and controls the pressure difference between the upstream synthetic jet hollow cavity 22 and the downstream synthetic jet hollow cavity 32, so as to weaken the influence of ballast.
Further, the working efficiency of the synthetic jet flow is improved. Specifically, the mixed synthetic jet device eliminates flow separation by absorbing the low-energy boundary layer and enhances injection of high-energy fluid into the boundary layer through intracavity excitation, so that the performance of the air inlet channel is improved by inhibiting separation, and the improvement of the total pressure recovery coefficient is facilitated.
Furthermore, the mixed jet formed by the synthetic jet induced by the vibrating diaphragm and the pulse jet driven by the pressure difference has zero mass input characteristic, does not need external mass flow input, and has obvious self-excitation characteristic.
Claims (3)
1. The supersonic speed air inlet flow field active flow control structure based on mixed synthetic jet is characterized by comprising a synthetic jet vibrating diaphragm array unit (1), an upstream synthetic jet generating pipeline (2), a downstream synthetic jet generating channel (3) and a pulse valve communication module (4);
The synthetic jet vibration membrane array unit (1) is arranged between the upstream synthetic jet generation pipeline (2) and the downstream synthetic jet generation channel (3), and the arrangement direction of the synthetic jet vibration membrane array unit is parallel to the horizontal direction;
The pulse valve communication module (4) is arranged between the upstream synthetic jet flow generation pipeline (2) and the downstream synthetic jet flow generation pipeline (3) and on one side of the synthetic jet flow vibration membrane array unit (1), and divides the fluid channel into the upstream synthetic jet flow generation pipeline (2) and the downstream synthetic jet flow generation channel (3) together with the synthetic jet flow vibration membrane array unit (1);
the upstream synthetic jet flow generating pipeline (2) and the downstream synthetic jet flow generating channel (3) share the same synthetic jet flow vibrating membrane array unit (1) and correspond to the front side and the back side of the synthetic jet flow vibrating membrane array unit (1) respectively;
The synthetic jet flow vibrating diaphragm array unit (1) adopts electromagnetic drive or piezoelectric drive and consists of a plurality of independent vibrating diaphragm units (11) which are arranged in parallel in a single row or a plurality of rows, and a metal substrate (13) is arranged on one side of each of the plurality of independent vibrating diaphragm units (11);
The independent vibrating diaphragm unit (11) is driven by electromagnetic or piezoelectric, generates reciprocating motion under the action of electric signals input from two ends, and is controlled by a signal generator and a power amplifier which are connected with the independent vibrating diaphragm unit;
The pulse valve communication module (4) comprises a pulse valve core (41) and a pulse valve actuating component (42) which are connected with each other, and is used for connecting or isolating the upstream synthetic jet flow generation pipeline (2) and the downstream synthetic jet flow generation pipeline (3) through periodically opening or closing the channels, wherein the pulse valve communication module (4) adopts electromagnetic driving or piston driving, and is used for communicating and isolating the upstream synthetic jet flow generation pipeline (2) and the downstream synthetic jet flow generation pipeline (3) through periodically opening and closing.
2. The supersonic speed air inlet flow field active flow control structure based on mixed synthetic jet according to claim 1, wherein the upstream synthetic jet generating pipeline (2) is a cavity with a hole, and comprises an upstream synthetic jet generating pipeline diversion channel (21) and an upstream synthetic jet hollow cavity (22) with one end provided with a synthetic jet vibration membrane array unit (1);
the downstream synthetic jet flow generating channel (3) is also a cavity with a hole, which comprises a downstream synthetic jet flow generating pipeline diversion channel (31) and a downstream synthetic jet flow hollow cavity (32),
One end of the upstream synthetic jet hollow cavity (22) and one end of the downstream synthetic jet hollow cavity (32) are connected with the synthetic jet vibration membrane array unit (1);
One end of the upstream synthetic jet flow generation pipeline diversion channel (21) and one end of the downstream synthetic jet flow generation pipeline diversion channel (31) are in a slit shape, are connected with the wall surface of the arranged air inlet channel, are arranged at the position near the upstream of boundary layer separation and reattachment, and the other end of the upstream synthetic jet flow generation pipeline diversion channel is connected with the synthetic jet flow containing cavity;
The end of the upstream synthetic jet hollow cavity (22) opposite to the downstream synthetic jet hollow cavity (32) comprises the other vibrating surface of the synthetic jet vibrating membrane array unit (1).
3. The supersonic inlet flow field active flow control structure based on mixed synthetic jet according to claim 1, wherein the independent vibrating diaphragm units (11) are provided with vibrating diaphragm connecting members (12) on both sides, and are arranged at equal intervals, the arrangement direction is parallel to the horizontal direction, and the vibrating diaphragm connecting members (12) are adhered or riveted and fixed on the metal substrate (13) of the array.
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| CN118128641A (en) * | 2024-05-08 | 2024-06-04 | 中国人民解放军国防科技大学 | A wide speed range inlet duct control device, control method and aircraft inlet system |
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| US8894019B2 (en) * | 2012-12-31 | 2014-11-25 | Florida State University Office of Commercialization | Method of using microjet actuators for the control of flow separation and distortion |
| CN110043369B (en) * | 2019-04-10 | 2024-11-26 | 南京航空航天大学 | An aircraft engine anti-icing device using synthetic jet to assist continuous jet |
| CN113027613B (en) * | 2021-04-22 | 2022-02-08 | 中国人民解放军国防科技大学 | Supersonic mixed pressure type air inlet starting device based on plasma synthetic jet |
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| CN118128641A (en) * | 2024-05-08 | 2024-06-04 | 中国人民解放军国防科技大学 | A wide speed range inlet duct control device, control method and aircraft inlet system |
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