CN114251188B - Spray pipe structure based on adaptive variable cycle engine and operation method thereof - Google Patents

Spray pipe structure based on adaptive variable cycle engine and operation method thereof Download PDF

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Publication number
CN114251188B
CN114251188B CN202111576650.7A CN202111576650A CN114251188B CN 114251188 B CN114251188 B CN 114251188B CN 202111576650 A CN202111576650 A CN 202111576650A CN 114251188 B CN114251188 B CN 114251188B
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culvert
spherical shell
adjusting sheet
engine
nozzle
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CN114251188A (en
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王强
郝健辛
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Beihang University
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Beihang University
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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
    • 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
    • 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
    • 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
    • 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

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 and comprises an inner-duct spray pipe and an outer-duct spray pipe, wherein the inner-duct spray pipe is a spherical convergent binary-divergent vectoring spray pipe, and the outer-duct spray pipe is a binary convergent-divergent ejector vectoring spray pipe. The invention can better utilize the third bypass gas of the self-adaptive variable cycle engine to fully mix the third bypass gas with the main flow before the third bypass gas is discharged, 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

Spray pipe structure based on adaptive variable-cycle engine and operation method thereof
Technical Field
The invention belongs to the technical field of aero-engine design, and particularly relates to a spray pipe structure based on an adaptive variable cycle engine and an operation method of the spray pipe structure.
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 envelope, low oil consumption, long aircraft range, automatic matching of inlet flow, good flying/generating combination performance, good stealth performance, contribution to thermal management design and the like, and is deeply valued by advanced countries of world aircraft engines.
The adaptive cycle engine has more working modes, and fig. 1 shows a flow structure of the adaptive variable cycle engine, which includes an inner bypass 1, a first outer bypass 2, a second outer bypass 3 and a fourth outer bypass 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 and an operation method thereof, and adopts a scheme of combining a spherical convergent binary expansion vectoring nozzle and a binary injection vectoring nozzle, so that third bypass gas of the adaptive variable-cycle engine is better utilized and fully mixed with a main flow before being exhausted, 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 is larger 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 invention, a nozzle arrangement is provided for installation in an exhaust system of an adaptive variable cycle aircraft engine and comprising an intravaginal nozzle and an extraductal 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, which is a spherical shell structure with two open ends, and the air inlet end of which is arranged on the fixed spherical shell in a way of centering and rotating around the spherical center of the fixed spherical shell, and the air outlet end of which is closer to the axis of the inner duct nozzle than the air inlet end of which is arranged on the fixed 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:
and the inner duct actuating cylinder assembly is connected between the movable spherical shell and the inner duct adjusting sheet so as to adjust the angle between the movable spherical shell and the inner duct 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 spherical shell is located on the radial outer side of the fixed spherical shell, and the movable spherical shell is in fit connection with the fixed spherical shell through a key groove structure, so that the movable spherical shell performs centering rotation around the fixed spherical shell.
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 point of the outer culvert contraction section regulating piece and the outer culvert expansion section regulating piece, and the second end of the inner culvert second actuating cylinder is hinged to a second hinged point on the inner culvert regulating 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.
In another aspect of the invention, there is provided a method of operating a ducted jet according to the foregoing jet structure, the ducted jet being 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 culvert 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 culvert spray pipe is adjusted through the culvert expansion section adjusting sheet actuating cylinder, so that the gas discharge direction of the culvert spray pipe is changed, and the engine can obtain the required vector thrust.
Preferably, the inner and outer culvert first and second 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 way and the culvert regulating plate rotates relative to the tail end of the movable spherical shell, the deflection positions of the culvert contraction section regulating plate and the culvert expansion section regulating plate are coordinated, so that the exhaust directions of inner culvert gas and outer culvert gas of the engine are relatively independent.
Therefore, the engine has a simple structure, can realize vector thrust, can play an injection role by utilizing the third bypass gas, increases the thrust of the engine, can reduce the temperature of the tail jet flow of the engine and the exhaust noise by mixing the third bypass gas and the bypass gas, and effectively improves the infrared stealth and sound stealth effects of the engine.
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-inner culvert, 2-first outer culvert, 3-second outer culvert, 4-third outer culvert, 5-nozzle structure inner culvert flow channel, 6-fixed spherical shell, 7-movable spherical shell, 8-inner culvert adjusting sheet, 9-inner culvert actuating cylinder assembly, 91-actuating cylinder body, 92-first connecting rod, 93-second connecting rod, 10-outer culvert contraction section adjusting sheet, 11-outer culvert expansion section adjusting sheet, 12-outer culvert contraction section adjusting sheet actuating cylinder, 13-outer culvert expansion section adjusting sheet actuating cylinder, 14-inner culvert first actuating cylinder and 15-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 present invention or its applications 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 actuating cylinder body 91, the first end 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 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.
In another aspect of the invention, there is provided a method of operating a ducted nozzle according to the foregoing nozzle structure, the ducted nozzle being 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 bypass 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 inner culvert and the outer culvert first actuating cylinders 14 are respectively hinged at the front ends of the outer culvert contraction section adjusting pieces 10 and at first hinged joints 71 at the outer sides of the movable spherical shells 7, one end of the inner culvert and the outer culvert second actuating cylinders 15 is hinged at hinged joints of the outer culvert contraction section adjusting pieces 10 and the outer culvert expansion section adjusting pieces 11, and the other end of the inner culvert and the outer culvert second actuating cylinders is hinged at second hinged joints 81 on the inner 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. The actuating cylinder body 91, the first end is fixedly arranged outside the movable spherical shell 7; a first end of the first connecting rod 92 is connected to a second end of the actuator cylinder body 91, and a second end of the first connecting rod is connected to a hinge point between the inner duct adjusting plate 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 extravascular nozzle includes: the external culvert contracting section adjusting plate comprises an external culvert contracting section adjusting plate 10, an external culvert expanding section adjusting plate 11, an external culvert contracting section adjusting plate actuator cylinder 12 and an external culvert expanding 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 way and the inner culvert regulating blade 8 rotates relative to the tail end of the movable spherical shell 7, the deflection positions of the outer culvert contraction section regulating blade 10 and the outer culvert expansion section regulating blade 11 are coordinated through the inner culvert first actuating cylinder 14 and the inner 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-divergent vectoring nozzle, and the outer-duct nozzle is a binary convergent-divergent 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.
Gaseous can form the ejection effect to 4 gaseous formation in the third culvert in the interior culvert, and the gaseous mixture of interior culvert and exterior 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.
Inner duct spray tube and outer duct spray tube all can realize the vector thrust of relative independence or linkage, 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 lamella 10 and outer culvert expansion section regulating lamella 11, the gaseous flow direction of third culvert has been changed, and then adjust inner 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)

1. A nozzle structure based on an adaptive variable-cycle engine is characterized in that the nozzle structure is arranged in an exhaust system of the adaptive variable-cycle aircraft engine and comprises an inner-duct nozzle and an outer-duct nozzle which is radially positioned outside the inner-duct nozzle;
the endoprosthesis nozzle includes:
-a spherical shell (6) with symmetrical openings at both ends, wherein the openings at both ends of the spherical shell (6) are perpendicular to the axis of the inner duct nozzle;
-a moving spherical shell (7) having a spherical shell structure with two open ends, an air inlet end of the moving spherical shell being arranged on the fixed spherical shell (6) in a manner of centering and rotating around the spherical center of the fixed spherical shell (6), 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
-a culvert regulator blade (8) hinged at its inlet end to the outlet end of the ball-moving shell (7) so that the angle between its inner wall surface and the axis of the culvert pipe is adjustable and at its outlet end farther from the axis of the culvert pipe than at its inlet end;
the bypass nozzle includes:
-a culvert contraction section regulating blade (10) with its outlet end closer to the axis of the culvert pipe than its inlet end; and
-a culvert expansion segment adjustment flap (11) hinged at its inlet end to the outlet end of the culvert contraction segment adjustment flap (10) so that the angle between its inner wall surface and the axis of the culvert pipe is adjustable and its outlet end is further from the axis of the culvert pipe than its inlet end.
2. The lance structure of claim 1, wherein the ducted lance further comprises:
the culvert actuating cylinder assembly (9) is connected between the movable spherical shell (7) and the culvert adjusting sheet (8) so as to adjust the angle between the movable spherical shell (7) and the culvert adjusting sheet (8).
3. The nozzle structure of claim 1, wherein the bypass nozzle 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 pipe.
4. A nozzle structure according to claim 2, characterized in that the movable ball shell (7) is located at the radial outer side of the fixed ball shell (6), and the movable ball shell (7) and the fixed ball shell (6) are in fit connection through a key groove structure so that the movable ball shell (7) rotates around the fixed ball shell (6) in a centering way.
5. The spout structure of claim 2 further comprising:
the two ends of the inner and outer culvert first actuating cylinders (14) are respectively hinged to the front end of the outer culvert contraction section adjusting sheet (10) and a first hinge point (71) on the outer side of the movable spherical shell (7); and
and the first end of the inner and outer culvert second actuating cylinder (15) is hinged to a hinged point of the outer culvert contraction section adjusting sheet (10) and the outer culvert expansion section adjusting sheet (11), and the second end of the inner and outer culvert second actuating cylinder is hinged to a second hinged point (81) on the inner culvert adjusting sheet (8).
6. A nozzle arrangement according to claim 5, characterized in that the endoprosthesis cartridge assembly (9) comprises:
the actuating cylinder body (91) is fixedly arranged at the outer side of the movable spherical shell (7) at a first end;
a first connecting rod (92), the first end of which is connected to the second end of the actuator cylinder body (91), and the second end of which is connected to the hinge point of the connotation adjusting sheet (8) and the movable spherical shell (7); and
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).
7. A method of operating the nozzle arrangement of claim 5, wherein 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 (7) rotating around the fixed spherical shell (6) in a centering way is controlled through 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 through the culvert actuating cylinder assembly (9) so as to change the gas discharge direction of the culvert in the engine, so that the engine can obtain the magnitude and the direction of the required vector thrust.
8. Method for operating a nozzle arrangement according to claim 7, characterized in that the centring rotation of the moving spherical shell (7) around the centring spherical shell (6) has 3 degrees of freedom, so that the thrust direction obtained by the engine can be adjusted in three dimensions.
9. The method of operating the nozzle structure of claim 3, wherein the bypass nozzle 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 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 as to change the gas discharge direction of the bypass spray pipe, so that the engine can obtain the required vector thrust.
10. A method of operating a nozzle arrangement according to claim 7, wherein the first and second rams (14, 15) are configured to:
when the movable spherical shell (7) rotates around the fixed spherical shell (6) in a centering way and the culvert regulating plate (8) rotates relative to the tail end of the movable spherical shell (7), the movable spherical shell keeps still, so that the culvert contraction section regulating plate (10) and the culvert expansion section regulating plate (11) move along with the movable spherical shell (7) and the culvert regulating plate (8), and the exhaust direction of the culvert gas of the engine and the exhaust direction of the culvert gas are mutually linked; or
When the movable spherical shell (7) rotates around the fixed spherical shell (6) in a centering mode 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 and the exhaust direction of the culvert gas are relatively independent.
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