CN114738795B - Support plate stabilizer with gas mixing function and integrated afterburner - Google Patents
Support plate stabilizer with gas mixing function and integrated afterburner Download PDFInfo
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- CN114738795B CN114738795B CN202210393950.XA CN202210393950A CN114738795B CN 114738795 B CN114738795 B CN 114738795B CN 202210393950 A CN202210393950 A CN 202210393950A CN 114738795 B CN114738795 B CN 114738795B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/16—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
- F23R3/18—Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/60—Support structures; Attaching or mounting means
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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
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
Abstract
In order to solve the problems of insufficient combustion and increased difficulty in ignition and flame stabilization caused by forward movement of a backflow area and a combustion area in the existing afterburner integrated design scheme, the invention provides a support plate stabilizer with a gas mixing function and an integrated afterburner. The middle part of the support plate stabilizer is provided with two symmetrical open cavities, the open cavities have the effect of mixing gas, the open cavities can replace a mixer in a traditional afterburner, the structure of the afterburner is simplified, and because the external air flows into the internal duct through holes on the front wall surface of the open cavities to be mixed with the internal air, the mixing distance of the internal air and the external air is shortened, the mixing effect of the internal air and the external air is enhanced, the mixing effect of the rear fuel and the mixed gas is facilitated, the uniformity of fuel distribution is improved, in addition, the oxygen content of the external air is higher than that of the internal air, the oxygen content of the mixed gas is improved after the external air and the internal air are mixed, and the external air and the internal air are combusted simultaneously, so that the combustion is more complete, and the flame stability and the combustion efficiency are improved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a support plate stabilizer with a gas mixing function and an integrated afterburner.
Background
Afterburner development has been about 80 years old, and while afterburner mass is about 20% of the engine, thrust is greatly enhanced. In general, the thrust can be improved by 40% to 50% after the turbojet engine is started and boosted, and the thrust improvement of the turbofan engine can be even more than 70%. Thrust lifting brings about lifting of maneuvering performance of the flight and expansion of flight envelope, so that development of the afterburner is crucial for military fighters. The flame stabilizer in the conventional afterburner is directly mounted in the main stream, and the air flow flows through the flame stabilizer, forming a recirculation zone behind it for organizing combustion, improving the stability of the flame. However, conventional flame holders can cause flow blockage, resulting in unavoidable flow losses.
In the 90 s of the 20 th century, an integrated design scheme of an afterburner and a turbine rear frame is proposed internationally, and a rectifying support plate and a flame stabilizer in the afterburner are integrally designed to form a support plate stabilizer. The scheme eliminates the traditional flame stabilizer, can effectively reduce flow blockage and reduce flow loss. The fuel oil adopts near-matching technology, the fuel oil is transversely sprayed out from two sides of the rectifying support plate, and the flame is stabilized by utilizing a backflow area formed at the rear of the rectifying support plate. This solution results in the recirculation zone of the afterburner being moved forward as a whole, as well as the combustion zone, but this forward movement is disadvantageous for afterburner. On one hand, the oxygen content in the air flow is reduced, the external air flow with more oxygen and the internal air flow with less oxygen in the afterburner are mixed behind the mixer, the fuel starts to burn before the mixer due to the forward movement of the combustion area, and at the moment, only the internal air flow with less oxygen participates in combustion, which is very unfavorable for the full combustion of the fuel; on the other hand, the flow speed of the air flow is increased, so that the residence time of fuel drops is shortened, the atomization effect of the fuel is poor, the fuel mass distribution in a backflow area behind the rectifying support plate is uneven, and the difficulty of ignition and flame stabilization is greatly increased. In addition, the outside of the rectifying support plate in the scheme is exposed to high Wen Nahan airflow, the temperature of the outer side wall of the support plate is high, and the thermal stress born by the support plate is large.
Disclosure of Invention
In order to solve the technical problems that the prior afterburner integrated design scheme leads the backflow area and the combustion area to move forward, so that the combustion is insufficient, the ignition and flame stabilization difficulties are greatly increased, the invention provides a support plate stabilizer with a gas mixing function and an integrated afterburner. The invention is provided with two open cavities in the middle of the support plate stabilizer, and the open cavities have the function of a mixer and can replace the mixer in the traditional afterburner; besides, the open concave cavity can enable the support plate stabilizer to form the front channel and the rear channel to distribute the outer culvert air flow, and the outer culvert air flow is led into the open concave cavity without increasing the blocking area of the support plate, and meanwhile the inclined rear wall surface of the open concave cavity enables the outer culvert air flow to smoothly flow to the rear side, and the outer culvert air flow clings to the outer side wall surface of the support plate stabilizer, so that the support plate stabilizer can be effectively cooled. Compared with the prior art, when the support plate stabilizer provided by the invention is adopted to form the afterburner, the traditional flame stabilizer and the traditional mixer can be omitted, and the number of parts and the flow blocking loss of air flow are reduced. In addition, the support plate stabilizer ensures that the inner and outer air flows can be mixed in advance at the open concave cavity, the oxygen content of the combustion air flow in the backflow area is improved, the turbulence degree of the air flow in the mixing process is increased, the atomization quality of fuel oil is improved, the difficulty of ignition and flame stabilization can be effectively reduced, and the flame stability and the combustion efficiency are improved.
The technical scheme of the invention is as follows:
the support plate stabilizer with the air mixing function is characterized in that: the support plate stabilizer comprises a support plate stabilizer front channel, a connecting plate and a support plate stabilizer rear channel which are sequentially connected along the air flow direction, wherein two open cavities which are symmetrically distributed relative to the connecting plate are formed by the rear wall surface of the support plate stabilizer front channel, the connecting plate and the front wall surface of the support plate stabilizer rear channel;
a baffle plate for shunting is arranged in the front channel of the support plate stabilizer, and a plurality of air holes for introducing air flow in the front channel of the support plate stabilizer into the open type concave cavity are uniformly formed in the rear wall surface of the front channel of the support plate stabilizer along the length direction of the front channel;
a plurality of uniformly distributed main fuel injection holes are formed in the left side wall and the right side wall of the back channel of the support plate stabilizer, and an air injection hole for injecting air jet flow to slow down the air flow speed at the position of the main fuel injection hole is formed in front of each main fuel injection hole; a plurality of on-duty fuel injection holes for forming on-duty flames are uniformly formed on the rear wall surface of the support plate stabilizer rear channel.
Further, a blunt body for rectification is arranged on the flow-facing surface of the front channel of the support plate stabilizer.
Further, the depth of each open cavity is 1/3-2/5W, and the width is 3/5-1W; w is the width of the tail end of the support plate stabilizer.
Further, the air holes on the back wall surface of the front channel of the support plate stabilizer are round holes; the diameter of the round holes is 3/20-1/4W, and the number of the round holes is 8-12.
Further, the aperture of the main fuel injection hole is 0.5mm-2.0mm, and the number of the main fuel injection holes is 6-15; the aperture of the air injection hole is 1-2mm; the aperture of the fuel injection hole on duty is 0.5mm-1.5mm, and the number of the fuel injection holes is 6-15.
Further, the blocking ratio of the stent stabilizer is 0.25-0.30.
The invention also provides an integrated afterburner, which comprises an afterburner body, a rear duct ejector, a plurality of support plate stabilizers and a center cone which are coaxially arranged from outside to inside in sequence; the plurality of support plate stabilizers are distributed on the outer wall of the central cone in a radial manner along the circumference; the method is characterized in that: the support plate stabilizer adopts the support plate stabilizer.
Further, the trailing rear wall of the strut stabilizer is radially provided with a rake angle.
Further, the inclination angle is 60 degrees to 75 degrees.
The beneficial effects of the invention are as follows:
1. the middle part of the support plate stabilizer is provided with two symmetrical open cavities, the open cavities have the effect of mixing gas, and can replace a mixer in a traditional afterburner, so that the integrated design of the mixer and the support plate stabilizer is realized, the structure of the afterburner is simplified, and because the external air flow flows into the internal duct through the holes on the front wall surface of the open cavities to be mixed with the internal air flow, compared with the traditional afterburner, the internal air flow and the external air flow are mixed in advance, the mixing distance of the internal air flow and the external air flow is shortened, the mixing effect of the internal air flow and the external air flow is enhanced, meanwhile, the exchange of the internal air flow and the external air flow in the mixing process increases the turbulence of the mixed gas, the mixing of fuel and the mixed gas at the rear is facilitated, the uniformity of fuel is improved, and in addition, the oxygen content of the mixed gas is improved after the external air flow and the internal air flow are mixed, and the external air flow are combusted simultaneously, so that the flame stability and the combustion efficiency are improved.
2. The support plate stabilizer has the functions of rectifying, mixing gas and stabilizing flame, can replace a turbine rectifying support plate, a mixer and a flame stabilizer in the traditional afterburner, reduces the number of parts forming the afterburner, reduces the complexity and the additional quality of a system, improves the compactness of the structure and shortens the length of the afterburner.
3. When the support plate stabilizer is adopted to form the afterburner, the traditional flame stabilizer can be omitted, the flow blockage of air flow is reduced, and the overall pressure recovery performance of the afterburner is improved.
4. According to the invention, the oil injection rod is arranged in the back channel of the support plate stabilizer, and the oil injection rod is cooled by using the external air flow entering the back channel of the support plate stabilizer, so that the fuel coking and the part ablation are prevented, and the service life and the reliability of the oil injection rod are improved; meanwhile, the external air flow entering the back channel of the support plate stabilizer can reach the support plate, the center cone is cooled, and the service life and reliability of the center cone are improved.
5. The air jet flow of the air jet holes can improve the penetration distance of fuel oil and the fuel oil mass distribution; the switching from small stress application to full stress application is realized by reasonably controlling the opening and closing of the fuel injection hole of the support plate stabilizer.
6. After the integrated afterburner is assembled, the radial inclination angle of the rear wall of the tail of the support plate stabilizer relative to the horizontal mask promotes the flame to spread along the radial and axial directions on the basis of stable combustion of flame, realizes the stable flame and the combined flame of the afterburner, forms a good combustion structure, is beneficial to the combustion and improves the combustion efficiency.
7. When the invention works, the external culvert air flow flowing into the front channel of the support plate stabilizer flows out of the round hole and then covers (or is close to) the outer surface of the support plate stabilizer, and the external culvert air flow is isolated from the height Wen Lailiu, so that the support plate stabilizer can be effectively cooled.
Drawings
FIG. 1 is a schematic view of the overall structure of a mixer and strut stabilizer integrated afterburner.
FIG. 2 is a schematic view of the structure of an integrated afterburner cone and strut stabilizer.
FIG. 3 is an overall cross-sectional view of a mixer and a strut stabilizer integrated afterburner.
Fig. 4 is a schematic structural view of the stent stabilizer.
FIG. 5 is a schematic illustration of jet air and fuel injection for a strut stabilizer.
Reference numerals:
the device comprises a 1-boosting cylinder, a 2-heat shield, a 3-rear duct ejector, a 4-support plate stabilizer, a 5-center cone, a 6-front end blunt body, a 7-round hole, an 8-open concave cavity, a 9-jet hole, a 10-main fuel injection hole, a 11-duty fuel injection hole, a 12-support plate stabilizer front channel, a 13-support plate stabilizer rear channel, a 14-air jet, a 15-main fuel and a 16-duty fuel.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figures 1-3, the afterburner integrating the mixer and the support plate stabilizer comprises an afterburner body 1, a rear duct ejector 3, a support plate stabilizer 4 and a center cone 5 which are coaxially arranged from outside to inside in sequence. An outer duct is formed between the boosting cylinder body 1 and the rear duct ejector 3. An inner duct is formed between the rear duct ejector 3 and the central cone 5. One end of the support plate stabilizer 4 is connected with the rear duct ejector 3, and the other end is connected with the center cone 5. A heat shield 2 is also arranged between the stress application cylinder 1 and the support plate stabilizer 4, one end of the heat shield 2 is connected with the tail end of the rear duct ejector 3, and a gap is arranged between the heat shield 2 and the stress application cylinder 1 and is used for passing through the external air flow.
As shown in fig. 4, a plurality of strut stabilizers 4 are circumferentially and radially distributed on the outer wall of the central cone 5; defining the forward end of the upstream face of the support plate stabilizer, wherein each support plate stabilizer comprises a support plate stabilizer front channel 12, a connecting plate and a support plate stabilizer rear channel 13 which are sequentially connected along the air flow direction, and the rear wall face of the support plate stabilizer front channel 12, the front wall face of the connecting plate and the front wall face of the support plate stabilizer rear channel 13 jointly form an open cavity 8, two open cavities 8 are symmetrically distributed on the left side and the right side of the connecting plate; the front support plate stabilizer channel 12 and the rear support plate stabilizer channel 13 are airflow channels extending from the rear duct ejector 3 to the direction of the center cone 5; a baffle plate for diversion is further arranged in the front channel 12 of the support plate stabilizer, so that the external air flow flows into the two open cavities 8 more uniformly from the rear wall surface of the front channel 12 of the support plate stabilizer; a plurality of round holes 7 (in other embodiments, holes in other forms can be adopted, but the flow loss of the round holes is minimum) are uniformly formed on the rear wall surface of the front channel 12 of the support plate stabilizer (namely, the front wall surface of the open concave cavity 8) along the length direction of the front channel, and the external air flow in the front channel 12 of the support plate stabilizer can enter the connotation through the round holes 7 so as to be mixed with the internal air flow and participate in subsequent combustion; the inner part of the back channel 13 of the support plate stabilizer is provided with an air channel and an oil channel, the air channel is an external air channel communicated with the inner part of the center cone 5, and the oil channel comprises a main fuel oil channel and an on-duty fuel oil channel; the left side wall and the right side wall of the back channel 13 of the support plate stabilizer are respectively provided with a plurality of direct-injection main fuel injection holes 10 uniformly distributed along the length direction, the front of each main fuel injection hole 10 is also provided with an air injection hole 9, the air injection holes 9 are used for injecting air jet flow, the direction of the air jet flow is perpendicular to the connotation air flow, the air flow speed at the position of the main fuel injection hole 10 can be slowed down, the penetration distance of fuel is increased, the fuel distribution is improved, and the fuel is diffused and combusted at the two sides of the support plate stabilizer to form main flames; a plurality of direct injection type on-duty fuel injection holes 11 are uniformly formed in the rear wall surface of the support plate stabilizer rear channel 13 along the length direction, and the fuel injection holes 11 can inject fuel into a back flow area behind the support plate stabilizer to form on-duty flame, so that flame stability is improved.
The center cone 5 is a typical component in an afterburner for deceleration diffusion of the connotation gas flow, and is an existing unit.
In order to promote flame to spread radially and axially and realize stress application flame combination and form a good combustion structure, when the support plate stabilizer is assembled, the rear wall of the tail part (the rear wall where the direct-injection type on-duty fuel injection hole 11 is positioned) is obliquely arranged at a certain inclination angle in the radial direction, and because the inclination angle influences the flame spreading effect, experiments prove that the inclination angle is preferably 60-75 degrees.
In order to rectify the high-speed incoming flow, the invention also arranges a blunt body 6 at the front end of the support plate stabilizer, which is used for changing the flow direction of the high-speed incoming flow (connotation airflow) to achieve the rectification effect.
Preferably: the depth of a single open concave cavity 8 on each support plate stabilizer is 1/3-2/5W, and the width is 3/5-1W; the diameter of the round holes 7 formed on the rear wall surface (namely the front wall surface of the open concave cavity 8) of the front channel 12 of the support plate stabilizer is 3/20-1/4W, and the number of the round holes is 8-12; w is the width of the tail end of the plate stabilizer, i.e. the width of the back channel of the plate stabilizer, as shown in FIG. 5; 6-15 main fuel injection holes 10 with the same specification and the same number and 0.5-2.0 mm aperture are respectively arranged on the left and right side walls of the back channel 13 of the support plate stabilizer, so as to ensure the similarity of combustion tissues at the two sides of the support plate stabilizer and ensure the combustion stability of afterburning; the aperture of the jet holes 9 arranged in front of the main fuel jet holes 10 is 1-2mm, the number of the jet holes is equal to that of the main fuel jet holes 10, and the positions of the jet holes are in one-to-one correspondence with the main fuel jet holes 10 (the jet holes are used for increasing the penetration depth of the main fuel, and the longer jet distance of the fuel can improve the uniformity of fuel distribution and is beneficial to the atomization and evaporation of the fuel, but the effect of too many jet holes on the penetration distance of the fuel is not obvious and the total pressure loss can be increased); 6-15 duty fuel injection holes 11 with the aperture of 0.5-1.5 mm are formed in the rear wall surface of the support plate stabilizer rear channel 13; the ratio of the area of the culvert flow passage blocked by the support plate stabilizer is set to be the blocking ratio of the support plate stabilizer, and the blocking ratio of the support plate stabilizer is designed to be 0.25-0.30 under the condition of ensuring the total pressure recovery performance, and the blocking ratio in the range is suitable in the balance of the benefits of the total pressure loss and the size of the backflow area.
The principle of the invention is as follows:
the external air flow flows into the afterburner along the axial direction from the external duct formed by the afterburner cylinder body 1 and the rear duct ejector 3, and the external air flow is used for participating in combustion, cooling and providing air jet flow sprayed out by the air jet holes 9.
The flow of the culvert gas into the afterburner is divided into four paths: an external air flow flows into the support plate stabilizer 4 through the support plate stabilizer front channel 12 and mainly participates in combustion; the second path of external air flow flows into the support plate through the support plate stabilizer rear channel 13 and is used for cooling the center cone 5 and providing air jet flow for the air jet holes 9; the third path of external air flow flows in from the channel between the stress application cylinder body 1 and the heat shield 2 and is used for cooling the heat shield 2; the fourth ambient air flow flows into the combustion zone through the small holes in the heat shield 2 for improving the ignition conditions.
The inner air flow flows into the afterburner from the inner channel formed by the rear channel ejector 3 and the central cone 5, and the rectification is realized under the action of the support plate stabilizer 4.
After the external air flow mainly participating in combustion enters the front channel 12 of the support plate stabilizer, the external air flow is divided into two parts by the partition boards in the support plate stabilizer, so that the external air flow is ensured to uniformly flow out from the round holes 7 on the front wall surface of the open type concave cavity 8 symmetrically distributed in fig. 4, the external air flow flowing out from the round holes 7 is mixed with the internal air flow rectified by the front end blunt body 6 at the open type concave cavity 8 on the support plate stabilizer 4, the mixing distance of the air flows is shortened, the two air flows are subjected to heat and mass exchange in the mixing process, the turbulence degree of mixed air is increased, the mixing progress of subsequent oil and gas is accelerated, and therefore, the fuel distribution uniformity and the combustion efficiency are improved.
The outer culvert air flow for cooling the center cone 5 and providing air jet flows in from the back channel 13 of the support plate stabilizer, one part of the outer culvert air flow flows into the center cone 5 at the bottom of the support plate stabilizer 4 along the back channel 13 of the support plate stabilizer so as to cool the wall surface of the center cone 5, and the other part of the outer culvert air flow is sprayed out from the air spraying holes 9 in fig. 4 to form air jet 14 shown in fig. 5; because the front of each main fuel injection hole 10 is provided with the air injection hole 9, the jet direction of the air injection hole 9 is vertical to the wall surface, and the air jet 14 interacts with the connotation incoming flow, the air flow speed at the main fuel injection hole 10 is slowed down, the tangential velocity component of the main fuel 15 is reduced, the penetration depth and the injection distance of the main fuel are increased, and the longer injection distance can improve the uniformity of fuel distribution, thereby being beneficial to the atomization and evaporation of the fuel.
The evenly mixed air flow and the on-duty fuel 16 are mixed and combusted in a low-speed backflow area behind the support plate stabilizer 4 to form on-duty flame, which is favorable for flame stabilization, and meanwhile, the on-duty flame propagates radially and axially along the rear wall surface of the support plate stabilizer 4 to realize flame combination, form a good combustion structure, enable the mixed air to be fully combusted and improve combustion efficiency.
The working condition from small stress application to full stress application can be changed by reasonably controlling the opening and closing of the fuel injection hole 11 on the support plate stabilizer 4: when the working condition of small stress application is switched on, the duty fuel injection holes 11 on the back wall surface of the support plate stabilizer 4 in fig. 4 are all opened, and the main fuel injection holes 10 on the two side wall surfaces are all closed; when the full-force operation is conducted, the main fuel injection holes 10 on the two side wall surfaces of the supporting plate stabilizer 4 and the duty fuel injection holes 11 on the rear wall surface in fig. 4 are all opened.
Claims (9)
1. Support plate stabilizer with mix gas function, its characterized in that: the support plate stabilizer comprises a support plate stabilizer front channel, a connecting plate and a support plate stabilizer rear channel which are sequentially connected along the air flow direction, wherein two open cavities which are symmetrically distributed relative to the connecting plate are formed by the rear wall surface of the support plate stabilizer front channel, the connecting plate and the front wall surface of the support plate stabilizer rear channel;
a baffle plate for shunting is arranged in the front channel of the support plate stabilizer, and a plurality of air holes for introducing air flow in the front channel of the support plate stabilizer into the open type concave cavity are uniformly formed in the rear wall surface of the front channel of the support plate stabilizer along the length direction of the front channel; the front channel of the support plate stabilizer is used for enabling one path of external air flow to flow into the support plate stabilizer from the front channel of the support plate stabilizer and flow into the two open cavities through the air holes formed in the rear wall surface of the front channel of the support plate stabilizer;
a plurality of uniformly distributed main fuel injection holes are formed in the left side wall and the right side wall of the back channel of the support plate stabilizer, and an air injection hole for injecting air jet flow to slow down the air flow speed at the position of the main fuel injection hole is formed in front of each main fuel injection hole; a plurality of duty fuel injection holes for forming duty flames are uniformly formed on the rear wall surface of the rear channel of the support plate stabilizer; the back channel of the support plate stabilizer is used for enabling one path of external air flow to flow into the support plate stabilizer so as to cool the center cone and provide air jet flow for the air jet holes.
2. The branching plate stabilizer with a gas mixing function as set forth in claim 1, wherein: and a blunt body for rectification is arranged on the flow facing surface of the front channel of the support plate stabilizer.
3. The branching plate stabilizer with a gas mixing function according to claim 1 or 2, characterized in that: the depth of each open concave cavity is 1/3-2/5W, and the width is 3/5-1W; w is the width of the tail end of the support plate stabilizer.
4. A strip stabilizer with air mixing function according to claim 3, characterized in that: the air holes on the back wall surface of the front channel of the support plate stabilizer are round holes; the diameter of the round holes is 3/20-1/4W, and the number of the round holes is 8-12.
5. The branching plate stabilizer with a gas mixing function as set forth in claim 4, wherein: the aperture of the main fuel injection hole is 0.5mm-2.0mm, and the number of the main fuel injection holes is 6-15; the aperture of the air injection hole is 1-2mm; the aperture of the fuel injection hole on duty is 0.5mm-1.5mm, and the number of the fuel injection holes is 6-15.
6. The branching plate stabilizer with a gas mixing function as set forth in claim 5, wherein: the blocking ratio of the support plate stabilizer is 0.25-0.30.
7. The integrated afterburner comprises an afterburner body, a rear duct ejector, a plurality of support plate stabilizers and a center cone which are coaxially arranged from outside to inside in sequence; the plurality of support plate stabilizers are distributed on the outer wall of the central cone in a radial manner along the circumference; the method is characterized in that: the strut stabilizer adopts the strut stabilizer of any one of claims 1 to 6.
8. The integrated afterburner of claim 7, wherein: the rear wall of the tail part of the support plate stabilizer is provided with an inclination angle along the radial direction.
9. The integrated afterburner of claim 8, wherein: the inclination angle is 60-75 degrees.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210393950.XA CN114738795B (en) | 2022-04-14 | 2022-04-14 | Support plate stabilizer with gas mixing function and integrated afterburner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210393950.XA CN114738795B (en) | 2022-04-14 | 2022-04-14 | Support plate stabilizer with gas mixing function and integrated afterburner |
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| CN114738795A CN114738795A (en) | 2022-07-12 |
| CN114738795B true CN114738795B (en) | 2023-06-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183271B (en) * | 2022-07-21 | 2023-08-22 | 中国航发沈阳发动机研究所 | Thermal jet ignition afterburner |
| CN115183274B (en) * | 2022-07-21 | 2023-08-04 | 中国航发沈阳发动机研究所 | Connotation ignition afterburner |
| CN115200038B (en) * | 2022-07-21 | 2023-08-22 | 中国航发沈阳发动机研究所 | Afterburner adopting air-cooled serial support plates for rectification |
| CN115200042B (en) * | 2022-07-21 | 2023-08-22 | 中国航发沈阳发动机研究所 | Afterburner adopting air-cooled tandem and split support plate rectification |
| CN115419917B (en) * | 2022-07-29 | 2024-06-04 | 西安航天动力研究所 | Heterogeneous multiphase flow mixing flame stabilizing device and combined power engine combustion chamber |
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| CN111380074B (en) * | 2020-03-18 | 2021-08-06 | 南京航空航天大学 | Intelligent adjusting system for air flow distribution of combustion chamber and working method thereof |
| CN113864819B (en) * | 2021-09-14 | 2022-10-11 | 南京航空航天大学 | Afterburner with air cooling structure |
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