CN114251188A - Spray pipe structure based on self-adaptive variable-cycle engine - Google Patents
Spray pipe structure based on self-adaptive variable-cycle engine Download PDFInfo
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- CN114251188A CN114251188A CN202111576650.7A CN202111576650A CN114251188A CN 114251188 A CN114251188 A CN 114251188A CN 202111576650 A CN202111576650 A CN 202111576650A CN 114251188 A CN114251188 A CN 114251188A
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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
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/06—Varying effective area of jet pipe or nozzle
- F02K1/11—Varying effective area of jet pipe or nozzle by means of pivoted eyelids
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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
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/06—Varying effective area of jet pipe or nozzle
- F02K1/15—Control or regulation
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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
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/28—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto using fluid jets to influence the jet flow
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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
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/28—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto using fluid jets to influence the jet flow
- F02K1/34—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto using fluid jets to influence the jet flow for attenuating noise
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides a spray pipe structure based on a self-adaptive variable-cycle engine, which is suitable for an exhaust system of the self-adaptive variable-cycle engine. The invention can better utilize the third foreign gas of the self-adaptive variable-cycle engine to fully mix the third foreign gas with the main flow before the third foreign gas is exhausted, thereby reducing the exhaust temperature, inhibiting the infrared radiation of an exhaust system, improving the exhaust speed, reducing the exhaust noise and effectively improving the infrared stealth and sound stealth effects of the engine. In addition, the thrust of the engine is increased by exhaust injection, the total thrust of the engine is greater than the sum of the thrust when the inner and outer culvert gases are separately discharged, and the thrust can be improved by about 16% under the condition of no vector.
Description
Technical Field
The invention belongs to the technical field of aero-engine design, and particularly relates to a spray pipe structure based on a self-adaptive variable-cycle engine.
Background
The adaptive variable-cycle engine is an advanced variable-cycle engine, and the flow and pressure ratio of a fan and a core engine are automatically changed by changing the positions of a plurality of adjustable geometric mechanisms and adopting an adaptive control technology according to different task requirements of an airplane, so that the engine obtains optimal performance at different speeds and height points in an envelope line, and the combined performance of the engine and the airplane is optimal. The aircraft engine has the advantages of good comprehensive performance in the envelope, low oil consumption, long aircraft range, automatic matching of air inlet flow, good flying/generating combination performance, good stealth performance, favorable thermal management design and the like, and is deeply valued by advanced countries of world aircraft engines.
The adaptive cycle engine has the outstanding advantage of having more working modes, and fig. 1 is a flow structure of the adaptive variable cycle engine, which comprises an inner culvert 1, a first outer culvert 2, a second outer culvert 3 and a fourth outer culvert 4. Compared with the single working mode of the traditional conventional cycle aircraft engine and the conventional variable cycle engine with two working modes of single/double external connotations, the working modes of the adaptive cycle engine comprise the following 4 working modes: a single culvert circulating working mode, namely only a first culvert is opened, and a second culvert and a third culvert are closed; a double-culvert circulating working mode, namely a first culvert and a second culvert are opened, and a third culvert is closed; the single culvert and the third culvert work modes, namely the first culvert and the third culvert are opened, and the second culvert is closed; and (3) a three-duct circulation working mode, namely all the external ducts are opened.
The self-adaptive cycle engine is lack of a special exhaust system structure at present, particularly, the gas of a third bypass is not effectively utilized, the third bypass gas which accounts for about 20% of the main flow is simply discharged to form thrust, and the function of the third bypass cannot be better exerted. Therefore, the adaptive cycle engine needs a special exhaust system structure suitable for different working conditions.
Disclosure of Invention
In view of the above, the invention provides a vectoring nozzle structure based on an adaptive variable-cycle engine, which adopts a scheme of combining a spherical convergent binary expansion vectoring nozzle and a binary injection vectoring nozzle, and better utilizes third bypass gas of the adaptive variable-cycle engine to fully mix with a main flow before the third bypass gas is discharged, so that the exhaust temperature is reduced, the infrared radiation of an exhaust system is inhibited, the exhaust speed is increased, the exhaust noise is reduced, and the infrared stealth and sound stealth effects of the engine are effectively improved. In addition, the thrust of the engine is increased by exhaust injection, the total thrust of the engine is greater than the sum of the thrust when the inner and outer culvert gases are separately discharged, and the thrust can be improved by about 16% under the condition of no vector.
In one aspect of the present invention, a nozzle arrangement is provided, the nozzle arrangement being provided in an exhaust system of an adaptive variable cycle aircraft engine and comprising an intravaginal nozzle and an overbuct nozzle located radially outside the intravaginal nozzle;
the endoprosthesis nozzle includes:
the fixed spherical shell is of a spherical shell structure with two symmetrically-opened ends, and the two openings of the fixed spherical shell are perpendicular to the axis of the inner ducted spray pipe;
-a moving spherical shell in a spherical shell structure with two open ends, an air inlet end of the moving spherical shell being arranged on the fixed spherical shell in a centering and rotating manner around the spherical center of the fixed spherical shell, and an air outlet end of the moving spherical shell being closer to the axis of the inner duct nozzle than the air inlet end of the moving spherical shell; and
-an inner duct adjusting blade, the inlet end of which is hinged to the outlet end of the moving ball shell, so that the angle between its inner wall surface and the axis of the inner duct nozzle is adjustable, and the outlet end of which is further from the axis of the inner duct nozzle than the inlet end of which;
the bypass nozzle includes:
-a culvert contraction section regulating blade, the outlet end of which is closer to the axis of the culvert pipe than the inlet end of which; and
-a culvert expansion segment flap, the inlet end of which is hinged to the outlet end of the culvert contraction segment flap, so that the angle between the inner wall surface thereof and the axis of the culvert pipe is adjustable, and the outlet end of which is further from the axis of the culvert pipe than the inlet end thereof.
Preferably, the endoprosthesis nozzle further comprises:
the inner culvert actuator cylinder assembly is connected between the movable spherical shell and the inner culvert adjusting sheet so as to adjust the angle between the movable spherical shell and the inner culvert adjusting sheet.
Preferably, the bypass nozzle further comprises:
the culvert contraction section adjusting sheet actuating cylinder is used for controlling the angle of the culvert contraction section adjusting sheet relative to the axis of the culvert spray pipe; and
the culvert expansion section adjusting sheet actuating cylinder is used for controlling the angle of the culvert expansion section adjusting sheet relative to the axis of the culvert spray pipe.
Preferably, the movable ball shell is located on the radial outer side of the fixed ball shell, and the movable ball shell and the fixed ball shell are in fit connection through a key groove structure, so that the movable ball shell rotates around the fixed ball shell in a centering manner.
Preferably, the nozzle structure further comprises:
the two ends of the inner culvert and the outer culvert first actuating cylinders are respectively hinged to the front ends of the outer culvert contraction section adjusting pieces and first hinge points on the outer sides of the movable spherical shells; and
and the first end of the inner culvert and the outer culvert second actuating cylinder is hinged to a hinged joint of the outer culvert contraction section adjusting piece and the outer culvert expansion section adjusting piece, and the second end of the inner culvert is hinged to a second hinged joint on the inner culvert adjusting piece.
Preferably, the endoprosthesis ram assembly comprises:
the first end of the actuating cylinder body is fixedly arranged on the outer side of the movable spherical shell;
the first end of the first connecting rod is connected to the second end of the actuating cylinder body, and the second end of the first connecting rod is connected to a hinge point of the connotation adjusting sheet and the movable spherical shell; and
and the first end of the second connecting rod is connected to the second end of the actuating cylinder body, and the second end of the second connecting rod is connected to the second hinge point.
Preferably, the ducted nozzle is configured to:
according to the magnitude and the direction of the vector thrust required by the engine, the angle of the movable spherical shell performing centering rotation around the fixed spherical shell is controlled through the culvert contraction section adjusting sheet actuating cylinder, and the angle between the inner wall surface of the culvert adjusting sheet and the axis of the culvert spraying pipe is controlled through the culvert actuating cylinder component, so that the gas discharge direction of the culvert in the engine is changed, and the engine can obtain the magnitude and the direction of the required vector thrust.
Preferably, the centering rotation of the moving spherical shell around the fixed spherical shell has 3 degrees of freedom, so that the thrust direction obtained by the engine can be adjusted in a three-dimensional direction.
Preferably, the bypass nozzle is configured to:
according to the vector thrust required by the engine, the angle of the culvert contraction section adjusting sheet relative to the axis of the bypass spray pipe is adjusted through the culvert contraction section adjusting sheet actuating cylinder, and the angle of the culvert expansion section adjusting sheet relative to the axis of the bypass spray pipe is adjusted through the culvert expansion section adjusting sheet actuating cylinder, so that the gas discharge direction of the bypass spray pipe is changed, and the engine can obtain the required vector thrust.
Preferably, the first and second endoframe rams are configured to:
when the movable spherical shell rotates around the fixed spherical shell in a centering way and the culvert regulating sheet rotates relative to the tail end of the movable spherical shell, the movable spherical shell is kept still, so that the culvert contraction section regulating sheet and the culvert expansion section regulating sheet move along with the movable spherical shell and the culvert regulating sheet, and the gas discharge direction of an inner culvert and the gas discharge direction of an outer culvert of the engine are linked with each other; or
When the movable spherical shell rotates around the fixed spherical shell in a centering mode and the culvert regulating sheet rotates relative to the tail end of the movable spherical shell, the deflection positions of the culvert contraction section regulating sheet and the culvert expansion section regulating sheet are coordinated, so that the exhaust direction of the gas in the culvert of the engine is relatively independent from the exhaust direction of the gas in the culvert of the engine.
Therefore, the engine has a simple structure, vector thrust can be realized, the third foreign culvert gas can be used for injection, the engine thrust is increased, meanwhile, the third foreign culvert gas and the inner culvert gas are mixed, the temperature of engine tail jet flow can be reduced, exhaust noise is reduced, and the infrared stealth and sound stealth effects of the engine are effectively improved.
Drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter, and not limit the subject matter.
FIG. 1 is a schematic view of three bypass flow structures of an adaptive variable cycle engine to which the present invention is directed;
FIG. 2 is a schematic structural view of a preferred embodiment of the nozzle arrangement of the present invention;
FIG. 3 is a schematic structural view of the endoprosthesis nozzle of the nozzle structure of the present invention;
fig. 4 is a schematic structural view of an extravascular nozzle of the nozzle structure of the present invention.
The system comprises 1-an inner culvert, 2-a first outer culvert, 3-a second outer culvert, 4-a third outer culvert, 5-a nozzle structure inner culvert flow passage, 6-a fixed spherical shell, 7-a movable spherical shell, 8-an inner culvert adjusting sheet, 9-an inner culvert actuating cylinder assembly, 91-an actuating cylinder body, 92-a first connecting rod, 93-a second connecting rod, 10-an outer culvert contraction section adjusting sheet, 11-an outer culvert expansion section adjusting sheet, 12-an outer culvert contraction section adjusting sheet actuating cylinder, 13-an outer culvert expansion section adjusting sheet actuating cylinder, 14-an inner culvert first actuating cylinder and 15-an inner culvert second actuating cylinder.
Detailed Description
Various exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to limit the invention, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments should be construed as merely exemplary, and not as limiting, unless otherwise specifically stated.
1-4, in one aspect of the present invention, a nozzle arrangement is provided for placement in an exhaust system of an adaptive variable cycle aircraft engine and includes an intravaginal nozzle and an overbuct nozzle located radially outward of the intravaginal nozzle;
the inner duct spray pipe includes:
a fixed spherical shell 6 in a spherical shell structure with two symmetrical openings, wherein the openings at the two ends of the fixed spherical shell 6 are perpendicular to the axis of the inner ducted nozzle;
a moving-ball casing 7, in the form of a spherical-casing structure with two open ends, with an inlet end arranged on the stationary-ball casing 6 in a manner of being centered and rotatable around the center of the stationary-ball casing 6 and an outlet end closer to the axis of the ducted nozzle than to the inlet end; and
an inner culvert regulating vane 8, the inlet end of which is hinged to the outlet end of the moving spherical shell 7, so that the angle between its inner wall surface and the axis of the inner culvert pipe is adjustable, and the outlet end of which is further from the axis of the outer culvert pipe than the inlet end of which;
the outer duct spray tube includes:
a bypass constrictor flap 10 with its outlet end closer to the axis of the bypass nozzle than its inlet end; and
a culvert expansion segment regulating blade 11, the inlet end of which is hinged to the outlet end of the culvert contraction segment regulating blade 10, so that the angle between the inner wall surface thereof and the axis of the culvert pipe is adjustable, and the outlet end of which is farther from the axis of the culvert pipe than the inlet end thereof.
Preferably, the endoprosthesis nozzle further comprises:
the inner duct actuator cylinder assembly 9 is connected between the movable spherical shell 7 and the inner duct adjusting sheet 8 so as to adjust the angle between the movable spherical shell 7 and the inner duct adjusting sheet 8.
Preferably, the bypass lance further comprises:
the culvert contraction section adjusting sheet actuating cylinder 12 is used for controlling the angle of the culvert contraction section adjusting sheet 10 relative to the axis of the culvert spray pipe; and
and the culvert expansion section adjusting sheet actuating cylinder 13 is used for controlling the angle of the culvert expansion section adjusting sheet 11 relative to the axis of the culvert spray pipe.
Preferably, the moving ball shell 7 is located at the radial outer side of the fixed ball shell 6, and the moving ball shell 7 and the fixed ball shell 6 are in fit connection through a key groove structure, so that the moving ball shell 7 performs centering rotation around the fixed ball shell 6.
Preferably, the nozzle structure further comprises:
the two ends of the inner and outer culvert first actuating cylinders 14 are respectively hinged to the front ends of the outer culvert contraction section adjusting pieces 10 and a first hinge point 71 on the outer side of the movable ball shell 7; and
the first end of the inner and outer culvert second actuating cylinder 15 is hinged to the hinged point of the outer culvert contraction section adjusting sheet 10 and the outer culvert expansion section adjusting sheet 11, and the second end is hinged to the second hinged point 81 on the inner culvert adjusting sheet 8.
Preferably, the endoprosthesis ram assembly 9 comprises:
the actuator cylinder body 91, the first end is fixed to the outside of the moving spherical shell 7;
a first connecting rod 92, a first end of which is connected to a second end of the actuator cylinder body 91, and a second end of which is connected to a hinge point of the connotation adjusting piece 8 and the movable spherical shell 7; and
a second connecting rod 93 having a first end connected to the second end of the actuator cylinder body 91 and a second end connected to the second hinge point 81.
Preferably, the endoprosthesis nozzle is configured to:
according to the magnitude and the direction of the vector thrust required by the engine, the angle of the brake spherical shell 7 which rotates around the fixed spherical shell 6 in a centering way is controlled by the culvert contraction section adjusting sheet actuating cylinder 12, and the angle between the inner wall surface of the culvert adjusting sheet 8 and the axis of the culvert jet pipe is controlled by the culvert actuating cylinder component 9, so that the gas discharge direction of the culvert in the engine is changed, and the engine can obtain the magnitude and the direction of the required vector thrust.
Preferably, the centering rotation of the moving ball shell 7 around the fixed ball shell 6 has 3 degrees of freedom, so that the thrust direction obtained by the engine can be adjusted in three dimensions.
Preferably, the bypass lance is configured to:
according to the vector thrust required by the engine, the angle of the culvert contraction section adjusting sheet 10 relative to the axis of the bypass spray pipe is adjusted through the culvert contraction section adjusting sheet actuating cylinder 12, and the angle of the culvert expansion section adjusting sheet 11 relative to the axis of the bypass spray pipe is adjusted through the culvert expansion section adjusting sheet actuating cylinder 13, so that the gas discharge direction of the bypass spray pipe is changed, and the engine can obtain the required vector thrust.
Preferably, the inner and outer culvert first ram 14 and inner and outer culvert second ram 15 are configured to:
when the movable spherical shell 7 rotates around the fixed spherical shell 6 in a centering way and the culvert adjusting sheet 8 rotates relative to the tail end of the movable spherical shell 7, the movable spherical shell is kept still, so that the culvert contraction section adjusting sheet 10 and the culvert expansion section adjusting sheet 11 move along with the movable spherical shell 7 and the culvert adjusting sheet 8, and the gas discharge direction of an inner culvert and the gas discharge direction of an outer culvert of the engine are linked with each other; or
When the movable spherical shell 7 rotates around the fixed spherical shell 6 in a centering way and the culvert adjusting sheet 8 rotates relative to the tail end of the movable spherical shell 7, the deflection positions of the culvert contraction section adjusting sheet 10 and the culvert expansion section adjusting sheet 11 are coordinated, so that the exhaust direction of the culvert gas of the engine is relatively independent from the exhaust direction of the culvert gas.
Therefore, the engine has a simple structure, vector thrust can be realized, the third foreign culvert gas can be used for injection, the engine thrust is increased, meanwhile, the third foreign culvert gas and the inner culvert gas are mixed, the temperature of engine tail jet flow can be reduced, exhaust noise is reduced, and the infrared stealth and sound stealth effects of the engine are effectively improved.
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the flow path of the adaptive variable cycle engine includes: the culvert comprises an inner culvert 1, a first culvert 2, a second culvert 3 and a third culvert 4. The airflow of the third culvert 4 of the self-adaptive variable cycle engine is not mixed with the first culvert 2 and the second culvert 3 all the time and is directly sprayed out, and the third culvert 4 has larger mass flow and still has great utilization value, so that a new exhaust spray pipe form is needed, and the third culvert gas is better utilized.
The method is suitable for the exhaust system of the self-adaptive variable-cycle engine, and is used for better utilizing the third foreign gas and realizing vector control.
As shown in fig. 2, the present invention provides a nozzle structure based on an adaptive variable cycle engine, the flow path portion of which includes a third bypass flow path (bypass gas flow path) 4 and a nozzle structure bypass flow path 5, and the gas flowing through the bypass 1, the first bypass 2 and the second bypass 3 flows into the nozzle structure bypass flow path 5.
The structural part of the nozzle structure comprises an inner duct spherical convergence binary vectoring nozzle and an outer duct binary contraction and expansion injection vectoring nozzle, and the nozzle structure specifically comprises the following components: the device comprises a fixed spherical shell 6, a movable spherical shell 7, an inner culvert adjusting sheet 8, an inner culvert actuator assembly 9, an outer culvert contraction section adjusting sheet 10, an outer culvert expansion section adjusting sheet 11, an outer culvert contraction section adjusting sheet actuator cylinder 12, an outer culvert expansion section adjusting sheet actuator cylinder 13, an inner and outer culvert first actuator cylinder 14 and an inner and outer culvert second actuator cylinder 15.
The two ends of the inside and outside culvert first actuating cylinders 14 are respectively hinged to the front ends of the outside culvert contraction section adjusting pieces 10 and a first hinged point 71 on the outer side of the movable spherical shell 7, one end of the inside and outside culvert second actuating cylinders 15 is hinged to a hinged point of the outside culvert contraction section adjusting pieces 10 and the outside culvert expansion section adjusting pieces 11, and the other end of the inside and outside culvert second actuating cylinders is hinged to a second hinged point 81 on the inside culvert adjusting pieces 8.
As shown in fig. 3, the endoprosthesis nozzle comprises: the device comprises a fixed spherical shell 6, a movable spherical shell 7, a culvert adjusting sheet 8 and a culvert actuator cylinder assembly 9. Wherein, the inner spherical shell is a fixed spherical shell 6, the outer spherical shell is a movable spherical shell 7, and the inner spherical shell and the outer spherical shell are connected in a matching way through a key groove structure. A cylinder body 91, a first end of which is fixedly arranged outside the movable spherical shell 7; a first connecting rod 92, a first end of which is connected to a second end of the actuator cylinder body 91, and a second end of which is connected to a hinge point of the inner duct adjusting piece 8 and the fixed spherical shell 7; and a second connecting rod 93 having a first end connected to the second end of the actuator cylinder body 91 and a second end connected to the second hinge point 81.
As shown in fig. 4, the bypass nozzle includes: the external culvert contraction section adjusting plate comprises an external culvert contraction section adjusting plate 10, an external culvert expansion section adjusting plate 11, an external culvert contraction section adjusting plate actuator cylinder 12 and an external culvert expansion section adjusting plate actuator cylinder 13. The outer culvert contraction section adjusting sheet 10 is controlled through an outer culvert contraction section adjusting sheet actuator cylinder 12, and the outer culvert expansion section adjusting sheet 11 is controlled through an outer culvert expansion section adjusting sheet actuator cylinder 13.
When the movable spherical shell 7 rotates around the fixed spherical shell 6 in a centering way and the inner culvert adjusting sheet 8 rotates relative to the tail end of the movable spherical shell 7, the inner culvert first actuating cylinder 14 and the inner culvert second actuating cylinder 15 are kept motionless, so that the outer culvert contraction section adjusting sheet 10 and the outer culvert expansion section adjusting sheet 11 move along with the movable spherical shell 7 and the inner culvert adjusting sheet 8, and the inner culvert gas discharge direction and the outer culvert gas discharge direction of the engine are linked mutually.
When the movable spherical shell 7 rotates around the fixed spherical shell 6 in a centering mode and the inner culvert adjusting sheet 8 rotates relative to the tail end of the movable spherical shell 7, the deflection positions of the outer culvert contraction section adjusting sheet 10 and the outer culvert expansion section adjusting sheet 11 are coordinated through the inner culvert first actuating cylinder 14 and the outer culvert second actuating cylinder 15, so that the exhaust direction of inner culvert gas and the exhaust direction of outer culvert gas of the engine are relatively independent.
Therefore, the technical scheme of the invention can be summarized into a nozzle structure based on the self-adaptive variable-cycle engine, which is suitable for an exhaust system of the self-adaptive variable-cycle engine and comprises an inner-duct nozzle and an outer-duct nozzle. Specifically, the inner-duct nozzle is a spherical convergent binary expansion vectoring nozzle, and the outer-duct nozzle is a binary convergent expansion injection vectoring nozzle.
Based on the technical scheme, the invention can at least realize at least one of the following technical effects:
through the connection of the internal and external culvert first actuating cylinders 14 and the internal and external culvert second actuating cylinders 15, the linkage control of the internal and external culvert spray pipes can be realized, vector propulsion can be realized, meanwhile, the cold air of the third external culvert can inject the internal culvert gas, the mixing of the internal culvert gas and the external culvert gas is promoted, the exhaust temperature of the engine is reduced, and the backward infrared stealth performance is improved.
Gas can draw the effect to the 4 gaseous formation of third culvert drawing in the inner culvert, and the gaseous mixture of inside and outside culvert reduces exhaust temperature and restraines exhaust system's infrared radiation, improves exhaust velocity and reduces exhaust noise, the effectual infrared stealthy and the stealthy effect of sound that improves the engine. In addition, the exhaust injection increases the thrust of the engine, and the total thrust of the engine is greater than the sum of the thrust when the inner culvert gas and the outer culvert gas are separately discharged.
The vector thrust that interior duct spray tube and outer duct spray tube all can realize relative independence or linkage, the cooperation through pressurized strut 14 and pressurized strut 15 changes the flow area of third culvert 4, thereby control third culvert flow, coordinate engine complete machine flow and match, and simultaneously, the change of third culvert flow and the difference of the deflection position of outer culvert contraction section regulating blade 10 and outer culvert expansion section regulating blade 11 have changed the gaseous flow direction of third culvert, and then adjust interior duct spray tube flow area, thereby coordinate the distribution of flow.
So far, some specific embodiments of the present invention have been described in detail by way of examples, but it should be understood by those skilled in the art that the above examples are only for illustrative purposes and are not intended to limit the scope of the present invention. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114810414A (en) * | 2022-04-19 | 2022-07-29 | 清华大学 | Vector adjustment nozzle and adaptive variable cycle engine |
| CN114856857A (en) * | 2022-05-12 | 2022-08-05 | 中国航发四川燃气涡轮研究院 | Integrated type round-square casing with multiple channels |
| CN115163329A (en) * | 2022-07-26 | 2022-10-11 | 中国航发沈阳发动机研究所 | An adaptive variable cycle engine exhaust structure |
| CN115614176A (en) * | 2022-08-29 | 2023-01-17 | 中国航发四川燃气涡轮研究院 | Infrared and radar comprehensive stealth device based on internal and external culvert structure integration |
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| US6067793A (en) * | 1996-12-26 | 2000-05-30 | Sener, Ingenieria Y Sistemas, S.A. | Variable geometry axisymmetric nozzle with 2-d thrust vectoring intended for a gas turbine engine |
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| CN115614176A (en) * | 2022-08-29 | 2023-01-17 | 中国航发四川燃气涡轮研究院 | Infrared and radar comprehensive stealth device based on internal and external culvert structure integration |
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