Support plate stabilizer structure suitable for afterburner and capable of enhancing fuel atomization

Abstract

The invention discloses a support plate stabilizer structure for enhancing fuel oil atomization and suitable for an afterburner, which is used for improving the fuel oil atomization effect and the combustion stability, and comprises two support plate outer edge frames, a support plate tail edge frame, a fuel oil injection rod and the like, and a support plate mixing channel is formed between the two support plate outer edge frames; and a plurality of cooling air cavities are formed in the main body part so as to prevent key parts from being ablated in a high-temperature environment. First fuel oil impacts the fan-shaped channels through the oil injection holes to form an oil film, is further atomized under the shearing action of airflow and is mixed with air, and premixed gas is formed and then enters the concave cavity to be combusted. According to the design, flames in the concave cavity can be kept stable under the extreme conditions of low temperature, low pressure and the like, so that the ignition and flameout boundary of the combustion chamber is widened, meanwhile, high-temperature fuel gas in the concave cavity can heat transverse jet flow of second fuel oil, and the evaporation and mixing efficiency of the second fuel oil is improved. By means of the integrated design, the number of components is reduced, the flow resistance in the non-stress-application state is reduced, and meanwhile the thrust-weight ratio is increased.

Description

Technical Field

[0001] This invention belongs to the field of afterburner technology for aero-engines and relates to flame stabilization and combustion enhancement devices for afterburners. Specifically, it relates to a support plate stabilizer structure for enhancing fuel atomization in afterburners, which plays a role in widening the quench boundary and improving combustion efficiency in the combustion organization of afterburners, and meets the requirements of high thrust-to-weight ratio and low flow resistance combustion performance in the integrated design of afterburners. Background Technology

[0002] The afterburner is a key component of modern high-performance aero engines. Its main function is to rapidly increase the engine's output thrust in a short period of time, improving the aircraft's maneuverability and enabling it to possess superior maneuverability and acceleration performance. Turbojet and turbofan engines with afterburners exhibit excellent thrust characteristics in both subsonic and supersonic flight conditions, meeting the high-performance requirements of aircraft during takeoff, climb, pursuit, and acceleration. Therefore, developing advanced afterburner technology is particularly important for improving the overall performance of aero engines.

[0003] Currently, the technological development of afterburners mainly focuses on the following aspects: First, it requires efficient and stable combustion under low flow resistance conditions, and a simple structure to facilitate a higher thrust-to-weight ratio. Second, afterburners need a well-designed fuel injection system to ensure rapid atomization and uniform distribution of fuel in the combustion zone after injection. Fuel atomization efficiency directly determines the completeness and efficiency of combustion. Traditional afterburners mainly consist of a fuel supply system, flame stabilizer, combustion chamber casing, and nozzle. The fuel supply ring is typically installed upstream of the flame stabilizer, controlling the fuel concentration distribution downstream of the stabilizer to achieve efficient and stable combustion. While this structure meets basic functional requirements, it suffers from several major problems:

[0004] First, the traditional afterburner has a complex structure with numerous components, resulting in a large overall mass and hindering the improvement of the engine's thrust-to-weight ratio. Second, the complex structural layout increases flow losses within the airflow channels, creating significant flow resistance, which, especially in non-afterburning operation, significantly reduces engine performance. Furthermore, traditional fuel injection and atomization devices are inefficient, leading to incomplete fuel-air mixing and affecting combustion efficiency and stability. In addition, the longer combustion chamber length not only increases the overall size of the engine but also its weight.

[0005] In recent years, with the increasing performance requirements of aero-engines, the design of afterburners has gradually evolved from distributed combustion components to integrated designs. The new generation of integrated afterburners requires the integration of the functions of various components. By integrating multiple subsystems such as fuel supply, flame stabilization, and cooling, the number of components is reduced to simplify the structure, lower drag losses in non-afterburning states, shorten the afterburner length, reduce the afterburner mass, and simultaneously improve fuel atomization quality and air-fuel mixing efficiency, thereby further increasing the thrust-to-weight ratio. However, achieving these technical goals still faces many challenges. Traditional separate designs struggle to simultaneously meet the requirements of efficient fuel atomization, uniform fuel distribution, and flame stability. Especially under extreme operating conditions such as low temperature and low pressure, ensuring sufficient fuel atomization and stable combustion, maintaining component reliability and durability while simplifying the structure, and achieving lightweight design while ensuring performance all require in-depth research.

[0006] In summary, the development of afterburner technology faces challenges in several aspects, including structural simplification, performance improvement, and enhanced adaptability. Therefore, developing a new type of afterburner component that can effectively enhance fuel atomization performance, improve combustion stability, and meet integrated design requirements is a pressing technical problem to be solved in the field of aero-engines. Summary of the Invention

[0007] (I) Purpose of the Invention

[0008] To address the shortcomings and deficiencies of existing afterburners, such as numerous components, complex structure, poor combustion stability, and low combustion efficiency under low flow resistance, and to meet the requirements of integrated afterburner design, this invention proposes a support plate stabilizer structure for enhanced fuel atomization suitable for afterburners. Through an innovative design of the support plate's outer frame and mixing channel layout, a fan-shaped channel is set within the support plate's outer frame. After the first fuel injection, an oil film forms on the channel surface, and further atomization and air mixing are achieved under the shearing action of the airflow within the mixing channel. This generates a fuel-air premixed gas that enters the concave cavity for stable combustion. The high-temperature airflow within the concave cavity heats the lateral jet of the second fuel, promoting its evaporation and mixing, thereby improving combustion efficiency and stability. This structural design not only enhances fuel atomization and evaporation performance and improves the degree of fuel-air mixing, thus enhancing the combustion performance of the afterburner and widening the ignition / quench boundary of the combustion chamber, but also meets the technical requirements of integrated afterburners for lightweight design, high thrust-to-weight ratio, and high-efficiency combustion.

[0009] (II) Technical Solution

[0010] To achieve the objective of this invention and solve its technical problems, the present invention adopts the following technical solution:

[0011] A support plate stabilizer structure for enhancing fuel atomization in afterburners, used to improve fuel atomization, optimize air mixing efficiency, and improve combustion stability, includes at least a fuel injector rod, an outer edge frame of the support plate, and a tail edge frame of the support plate. Specifically:

[0012] --The outer edge frame of the support plate includes a first outer edge frame body and a second outer edge frame body disposed opposite to each other in the width direction of the stabilizer, and the slit between the two forms a support plate mixing channel extending along the length direction of the stabilizer, wherein:

[0013] The two outer frame bodies have the same structure, both being columnar structures extending along the height of the stabilizer. They include a main body with a roughly rectangular cross-section and a fan-shaped part disposed on the front wall of the main body. The fan-shaped part smoothly transitions with the outer wall of the main body to form an aerodynamic surface with a tapered front end. The inner wall of the fan-shaped part includes a flat surface at its front end and a concave fan-shaped surface at its rear end. The flat surface is coplanar with the inner wall of the main body. The tail end face of the fan-shaped part is integrally formed on the front wall of the main body, and the width of the tail end face is smaller than that of the front wall of the main body, so that a stepped concave fan-shaped channel is formed between the concave fan-shaped surface on the inner side of the fan-shaped part and the front wall of the main body.

[0014] The main body is provided with a first fuel injector mounting hole and a second fuel injector mounting hole that extend through its entire height. The first fuel injector mounting hole is located near the front wall of the main body, and its inner wall is provided with a plurality of slots that extend through the front wall of the main body and communicate with the fan-shaped channel along the height direction. The second fuel injector mounting hole is located near the rear wall of the main body, and its inner wall is provided with a plurality of slots that extend through the outer wall of the main body along the height direction.

[0015] --The fuel injection rod includes a first fuel injection rod and a second fuel injection rod, both of which adopt a Y-shaped design. The two branch injection rods of the first fuel injection rod are respectively set in the first fuel injection rod mounting holes of the outer edge frame of the two support plates, and the two branch injection rods of the second fuel injection rod are respectively set in the second fuel injection rod mounting holes of the outer edge frame of the two support plates. Each branch injection rod is provided with an injection hole that corresponds one-to-one with the slot hole on the inner wall of the fuel injection rod mounting hole.

[0016] --The support plate tail edge frame is located downstream of the tail end of the support plate outer edge frame. It is a columnar structure extending along the height direction of the stabilizer. The front wall of its main body faces the support plate mixing channel and forms a concave cavity space between it and the rear wall of the main body of the two support plate outer edge frames. At the center of the front wall, there is a concave cavity partition that is perpendicular to the wall and extends along the height direction of the stabilizer. The front end of the concave cavity partition extends upstream to the outlet position of the support plate mixing channel and divides the concave cavity space into two independent areas arranged opposite to each other and connected to the support plate mixing channel in the width direction.

[0017] (III) Technical Effects

[0018] Compared with the prior art, the fuel atomization enhanced support plate stabilizer of the present invention has the following beneficial and significant technical effects:

[0019] (1) This invention designs a mixing channel, a concave fan-shaped surface, and a fan-shaped groove in the outer frame of the support plate. This allows the first fuel to be injected from the injection hole into the fan-shaped groove within the outer frame of the support plate, impacting the concave fan-shaped surface to form a stable oil film. The formed oil film is further atomized and mixed under the shearing action of the airflow in the mixing channel of the support plate, forming a uniform fuel-air premixed gas. This process effectively improves the mixing efficiency of fuel and air, thereby enhancing the overall combustion performance of the combustion chamber. Due to the improved atomization quality, combustion is more complete, which helps to reduce emissions and increase thrust output.

[0020] (2) By setting up a concave cavity structure and designing flame stability, the present invention enables the flame in the concave cavity to burn stably under extreme conditions such as low temperature and low pressure after the premixed gas enters the concave cavity for combustion, thereby widening the ignition and quenching boundary of the combustion chamber, improving combustion efficiency and combustion performance, and ensuring that the engine can maintain a good working state under different operating conditions. At the same time, the high temperature gas in the concave cavity can also heat the lateral jet of the second fuel, causing it to evaporate and mix into the recirculation zone at the tail edge of the support plate for stable combustion, thereby improving the combustion performance of the combustion chamber.

[0021] (3) The integrated structure design of the stabilizer plate adopted in this invention not only reduces the number of components but also reduces flow resistance loss in non-afterburning states. This structural simplification helps reduce the overall weight of the engine, improves the thrust-to-weight ratio, and thus enhances the aircraft's maneuverability and economy. Furthermore, the simplified structure also helps reduce manufacturing and maintenance costs and improve production efficiency. In addition, this invention effectively solves the problem of material ablation under high-temperature environments through the design of cooling air chambers. The design of the cooling air chamber at the leading edge of the stabilizer plate, the fuel injector cooling air chamber, and the concave cavity cooling air chamber ensures that key components maintain stable performance under high-temperature conditions, extending their service life. This cooling solution not only improves structural safety but also provides protection for the engine operating under extreme conditions. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of an afterburner equipped with the fuel atomization enhancement stabilizer of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the support plate stabilizer structure for enhancing fuel atomization according to the present invention.

[0025] Figure 3 This is a schematic cross-sectional view of the center section of the support plate stabilizer structure for enhancing fuel atomization according to the present invention;

[0026] Figure 4 This is a side view of the structure of the fuel atomization enhancement plate stabilizer of the present invention;

[0027] Figure 5 This is a front view of the structure of the fuel atomization enhancement plate stabilizer of the present invention;

[0028] Figure 6 This is a cross-sectional schematic diagram of the first fuel injection rod of the present invention;

[0029] Figure 7 This is a cross-sectional schematic diagram of the second fuel injection rod of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 101-Engine outer bypass channel, 102-Engine inner bypass channel, 103-Center cone, 104-Fuel passage, 105-Support plate stabilizer, 1-First fuel injector rod, 2-Second fuel injector rod, 3-Bearing plate, 4-Connecting plate, 5-Mounting plate, 6-First support plate outer edge frame, 7-Second support plate outer edge frame, 8-Support plate tail edge frame, 9-Stabilizer mounting seat, 201-Support plate mixing channel, 202-Support plate leading edge cooling chamber, 203-Injector rod cooling chamber, 204-Concave cavity cooling chamber, 205-Concave cavity cooling vent, 206-Concave cavity space, 207-Support plate tail edge cooling chamber, 208-Support plate cooling vent. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0033] This invention aims to propose a support plate stabilizer structure for enhanced fuel atomization suitable for afterburners. Through an innovative design of the support plate's outer frame and mixing channel layout, a fan-shaped channel is set within the outer frame. After the first fuel injection, an oil film forms on the channel surface, and further atomization and air mixing are achieved under the shearing action of the airflow within the mixing channel. This generates a fuel-air premixed gas that enters a concave cavity for stable combustion. The high-temperature airflow within the concave cavity heats the lateral jet of the second fuel, promoting its evaporation and mixing, thereby improving combustion efficiency and stability. This structural design not only enhances fuel atomization and evaporation performance and improves the degree of fuel-air mixing, thus enhancing the combustion performance of the afterburner and widening the ignition / quench boundary of the combustion chamber, but also meets the technical requirements of integrated afterburners for lightweight design, high thrust-to-weight ratio, and efficient combustion.

[0034] Figure 1 The diagram shows an overall schematic of an afterburner equipped with the fuel atomization enhancement stabilizer of this invention. The afterburner structure includes an outer bypass channel 101, an inner channel 102, and a central cone 103, forming the main framework of the combustion chamber. In this integrated afterburner design, the fuel passage 104 and the stabilizer 105 are integrated, resulting in a more compact layout and reduced component count, thereby optimizing the airflow distribution within the combustion chamber. Simultaneously, cooling air from the outer bypass channel 101 is used to cool the fuel passage 104 and the stabilizer 105. This cooling air enters the internal structure of the stabilizer through a dedicated cooling air chamber and cooling air holes, effectively reducing component temperature and preventing thermal damage under high-temperature operating conditions.

[0035] Figure 2 This is a three-dimensional structural schematic diagram of the support plate stabilizer for enhancing fuel atomization in an afterburner according to the present invention. Figure 3 This is a schematic cross-sectional view of the center section of the support plate stabilizer structure. (See diagram below.) Figure 2 , 3As shown, the support plate stabilizer structure of the present invention is used to enhance the fuel atomization effect of the afterburner, optimize the air mixing efficiency and combustion stability, and includes: a first fuel injection rod 1, a second fuel injection rod 2, a load-bearing plate 3, a connecting plate 4, a mounting plate 5, a first support plate outer edge frame 6, a second support plate outer edge frame 7, a support plate tail edge frame 8, a stabilizer mounting base 9 and other components and structures.

[0036] Specifically, in the enhanced fuel atomization stabilizer structure of the present invention, the outer frame bodies 6 and 7 of the two supports have the same structure, both being columnar structures extending along the height direction of the stabilizer. Each includes a main body I with a generally rectangular cross-section and a fan-shaped part II disposed on the front wall of the main body I. The fan-shaped part II smoothly transitions to the outer wall of the main body I, forming a conical aerodynamic shape surface at its front end. The inner wall of the fan-shaped part II includes a straight surface II-1 at its front end and a concave fan-shaped surface II-2 at its rear end. The straight surface II-1 is coplanar with the inner wall of the main body I. The tail end face of the fan-shaped part II is integrally formed on the front wall of the main body I, and the tail end face... The width of the end face is smaller than the front wall of the main body I, so that the concave fan-shaped surface II-2 on the inner side of the fan-shaped part II forms a stepped concave fan-shaped channel between the front wall of the main body I; the main body I is provided with a first fuel injector mounting hole I-1 and a second fuel injector mounting hole I-2 that penetrate its entire height. The first fuel injector mounting hole I-1 is arranged near the front wall of the main body I, and its inner wall is provided with a number of slots that penetrate the front wall of the main body I and communicate with the fan-shaped channel along the height direction. The second fuel injector mounting hole I-2 is arranged near the rear wall of the main body I, and its inner wall is provided with a number of slots that penetrate the outer wall of the main body I along the height direction.

[0037] The fuel injection rod includes a first fuel injection rod 1 and a second fuel injection rod 2, both of which adopt a Y-shaped design. The two branch injection rods of the first fuel injection rod 1 are respectively set in the first fuel injection rod mounting hole I-1 of the outer edge frame of the two support plates, and the two branch injection rods of the second fuel injection rod 2 are respectively set in the second fuel injection rod mounting hole I-2 of the outer edge frame of the two support plates. Each branch injection rod is provided with an injection hole that corresponds one-to-one with the slot hole on the inner wall of the fuel injection rod mounting hole.

[0038] The support plate tail edge frame 8 is located downstream of the tail end of the support plate outer edge frame. It is a columnar structure extending along the height direction of the stabilizer. The front wall of its main body 8-1 faces the support plate mixing channel 201 and forms a concave cavity space 206 between it and the rear wall of the main body I of the two support plate outer edge frames. A concave cavity partition 8-2 is provided at the center of the front wall, which is perpendicular to the wall and extends along the height direction of the stabilizer. The front end of the concave cavity partition 8-2 extends upstream to the outlet of the support plate mixing channel 201 and divides the concave cavity space 206 into two independent areas arranged opposite to each other and connected to the support plate mixing channel 201 in the width direction.

[0039] More specifically, in this invention, the first support plate outer edge frame 6 and the second support plate outer edge frame 7 constitute the support plate outer edge frame. Both have identical structures and are welded to the stabilizer mounting base 9 in a relatively opposite arrangement. The slit between the two support plate outer edge frames 6 and 7 forms a support plate mixing channel 201. The mainstream gas in the inner channel 102 atomizes, mixes, and evaporates the fuel jet from the first fuel injection rod 1 through the mixing channel, forming a fuel-air premixed gas. The support plate tail edge frame 8 is welded to the stabilizer mounting base 9, forming a cavity 206 on the support plate stabilizer together with the support plate outer edge frames 6 and 7 and the stabilizer mounting plate 5. The fuel-air premixed gas in the mixing channel 201 enters the cavity to organize combustion. The load-bearing plate 3, connecting plate 4, and mounting plate 5 are welded together to form the mounting bracket for the support plate stabilizer. The load-bearing plate 3 connects the heat shield and the engine combustion chamber casing. The outer edge frame 6 of the first support plate, the outer edge frame 7 of the second support plate, and the tail edge frame 8 of the support plate are welded to the mounting plate 5, thereby fixing the support plate stabilizer to the casing of the engine combustion chamber.

[0040] Figure 3 This is a schematic cross-sectional view of the center section of the support plate stabilizer for enhancing fuel atomization according to the present invention. Figure 4 This is a side view of the support plate stabilizer for enhancing fuel atomization according to the present invention. Figure 5 This is a front view of the fuel atomization enhancement stabilizer of the present invention. (Combined with...) Figures 2-5 The mixing channel 201 is located in the center of the support plate stabilizer and is a narrow air slit. The mainstream air enters the concave cavity 206 through the mixing channel 201 to organize combustion. The outer edge frame bodies 6 and 7 of the support plate have the same structure. Both the outer edge frame bodies 6 and 7 of the support plate are provided with a front edge air chamber 202, a fuel injector rod cooling air chamber 203, and a concave cavity cooling air chamber 204. Specifically:

[0041] The fan-shaped portion of the outer frame body 6 and 7 of the support plate is preferably configured as a hollow structure, and its inner cavity is formed as a front edge cooling air chamber 202 of the support plate that is connected to an external cooling air source. The front edge cooling air chamber 202 of the support plate is arranged through the height direction of the fan-shaped portion II, and several cooling air holes connected to the front edge cooling air chamber 202 are evenly opened along the height direction on the outer wall surface and / or the inner straight surface of the fan-shaped portion II, so as to improve its cooling effect and heat resistance while ensuring the structural strength of the fan-shaped portion.

[0042] In addition, a fuel injector cooling air chamber 203 is preferably provided inside the main body I of the outer frame 6 and 7 of the support plate. The fuel injector cooling air chamber 203 is connected to an external cooling air source. It is arranged to run through the main body along the height direction and is located between the first fuel injector mounting hole I-1 and the second fuel injector mounting hole I-2 in the length direction of the stabilizer. Several cooling air holes are distributed along the height direction on the inner wall of the fuel injector cooling air chamber 203, passing through the inner and / or outer wall surfaces of the main body I. These holes are used to guide the cooling airflow to cover the inner and / or outer wall surfaces of the main body I, forming a stable cooling air film layer. This effectively reduces the temperature of each fuel injector and the main body, and improves the temperature control effect during the fuel atomization process.

[0043] Preferably, a recessed cooling air chamber 204 is provided inside the main body of the outer edge frame of the support plate. The recessed cooling air chamber 204 is connected to an external cooling air source and is arranged to run through the height of the main body. On the inner wall of the recessed cooling air chamber 204, there are a number of recessed air holes 205 distributed along the height direction, which pass through the rear wall of the main body and are connected to the recessed space. These holes can be used to cool the front wall of the recessed cavity 206 and prevent the recessed cavity from being burned by high-temperature combustion gas.

[0044] Preferably, a cooling air chamber 207 extending through the entire height of the support plate tail edge frame 8 is provided within the main body of the support plate tail edge frame 8. The cooling air chamber 207 is connected to an external cooling air source, and several support plate air holes 208 are distributed along the height direction on its inner wall, passing through the rear wall of the main body and communicating with the external environment. These air holes are used to cool the rear wall surface of the support plate tail edge frame 8 and prevent the wall surface of the support plate tail edge frame 8 from being burned. At the same time, the cooling airflow in the support plate tail edge cooling air chamber 207 also cools the rear wall surface of the recess 206, preventing the wall surface of the support plate tail edge frame 8 from being burned by the high-temperature gas in the recess 206.

[0045] More preferably, the external cooling air source is the cooling gas in the engine bypass channel 101. The tops of the cooling air chamber 202 at the front edge of the support plate, the cooling air chamber 203 at the fuel injector rod, the cooling air chamber 204 at the concave cavity, and the cooling air chamber 207 at the rear edge of the support plate are all connected to the engine bypass channel 101. The cooling of each cavity is achieved by introducing the cooling gas in the engine bypass channel 101.

[0046] Figure 6This is a cross-sectional schematic diagram of the first fuel injector rod of the present invention. The first fuel injector rod 1 adopts a Y-shaped design. After the fuel inlet, the first fuel injector rod 1 is divided into two injector rods, which are respectively installed in the injector rod mounting holes of the outer edge frame body 6 of the first support plate and the outer edge frame body 7 of the second support plate. The injector holes on the injector rods correspond to the slots on the fan-shaped channel. The first fuel is injected from the injector holes into the fan-shaped channel in the outer edge frame of the support plate, and forms an oil film by impacting the fan-shaped surface. Under the shearing action of the airflow in the mixing channel, it is further atomized and mixed to form a premixed fuel-air mixture. Preferably, the concave fan-shaped surface II-2 of the fan-shaped part II of the outer edge frame bodies 6 and 7 of the two support plates is processed with micro-groove textures distributed along the height direction to improve the adhesion of fuel on the concave fan-shaped surface II-2, thereby forming a more stable oil film after the fuel impacts the concave fan-shaped surface II-2, enhancing the atomization effect of the fuel in the mixing channel 201, and making the mixing of fuel and air more uniform.

[0047] Figure 7 This is a cross-sectional schematic diagram of the second fuel injector rod of the present invention. The second fuel injector rod 2 has a similar structure to the first fuel injector rod 1, both adopting a Y-shaped design. The injection holes correspond to the slots opened on the outer walls of the first support plate outer edge frame 6 and the second support plate outer edge frame 7. The second fuel is directly injected into the mainstream air, and the resulting transverse jet is further evaporated by the high-temperature combustion gas in the concave cavity 206, and enters the recirculation zone at the trailing edge of the support plate for combustion. Preferably, the fuel supply systems of both the first fuel injector rod 1 and the second fuel injector rod 2 are equipped with solenoid valves and fuel flow sensors, and are connected to the engine control system to achieve precise control of the fuel injection quantity and timing, and automatically adjust the fuel distribution ratio according to different flight states and environmental conditions to optimize combustion efficiency and stability.

[0048] Preferably, the concave cavity baffle 8-2 has multi-layered guide vanes distributed along the height direction on both sides of its surface. These guide vanes guide the airflow within the concave cavity 206 to flow along both sides of the baffle, thereby forming a stable airflow distribution within the concave cavity region. This avoids turbulence and uneven flow fields, thereby enhancing the mixing effect of fuel and air and further improving combustion stability. Furthermore, the leading edge of the concave cavity baffle 8-2 is preferably machined into a cone shape to guide the airflow in the support plate mixing channel 201 to smoothly enter the concave cavity region on both sides, forming a symmetrical and uniform flow field distribution. This improves the flow efficiency of the airflow and optimizes the thermal management effect within the combustion chamber.

[0049] The stabilizer structure of this invention achieves multi-stage enhancement of fuel atomization and airflow mixing by setting a composite structure of a fan-shaped part and a main body on the outer frame of the support plate, combined with the flow field design of the concave fan-shaped channel and the mixing channel of the support plate, and with the dual-path injection system of the Y-shaped fuel injector. At the same time, the use of a concave cavity space design with baffles and a multi-cavity cooling system effectively improves the flame stability performance and structural reliability, providing a strong guarantee for the efficient and stable operation of the afterburner.

[0050] The objectives of this invention have been fully and effectively achieved through the above embodiments. Those skilled in the art will understand that this invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments described above. Although the invention has been described with reference to what is currently considered the most practical and preferred embodiments, it should be understood that the invention is not limited to the disclosed embodiments, and any modifications that do not depart from the functional and structural principles of the invention will be included within the scope of the claims.

Claims

1. A stabilizer structure for enhancing fuel atomization in an afterburner, comprising at least a fuel injector rod, an outer edge frame of the stabilizer, and a tail edge frame of the stabilizer, characterized in that: --The outer edge frame of the support plate includes a first outer edge frame body and a second outer edge frame body disposed opposite to each other in the width direction of the stabilizer, and the slit between the two forms a support plate mixing channel extending along the length direction of the stabilizer, wherein: The two outer frame bodies have the same structure, both being columnar structures extending along the height of the stabilizer. They include a main body with a roughly rectangular cross-section and a fan-shaped part disposed on the front wall of the main body. The fan-shaped part smoothly transitions with the outer wall of the main body to form an aerodynamic surface with a tapered front end. The inner wall of the fan-shaped part includes a flat surface at its front end and a concave fan-shaped surface at its rear end. The flat surface is coplanar with the inner wall of the main body. The tail end face of the fan-shaped part is integrally formed on the front wall of the main body, and the width of the tail end face is smaller than that of the front wall of the main body, so that a stepped concave fan-shaped channel is formed between the concave fan-shaped surface on the inner side of the fan-shaped part and the front wall of the main body. The main body is provided with a first fuel injector mounting hole and a second fuel injector mounting hole that extend through its entire height. The first fuel injector mounting hole is located near the front wall of the main body, and its inner wall is provided with a plurality of slots that extend through the front wall of the main body and communicate with the fan-shaped channel along the height direction. The second fuel injector mounting hole is located near the rear wall of the main body, and its inner wall is provided with a plurality of slots that extend through the outer wall of the main body along the height direction. --The fuel injection rod includes a first fuel injection rod and a second fuel injection rod, both of which adopt a Y-shaped design. The two branch injection rods of the first fuel injection rod are respectively set in the first fuel injection rod mounting holes of the outer edge frame of the two support plates, and the two branch injection rods of the second fuel injection rod are respectively set in the second fuel injection rod mounting holes of the outer edge frame of the two support plates. Each branch injection rod is provided with an injection hole that corresponds one-to-one with the slot hole on the inner wall of the fuel injection rod mounting hole. --The support plate tail edge frame is located downstream of the tail end of the support plate outer edge frame. It is a columnar structure extending along the height direction of the stabilizer. The front wall of its main body faces the support plate mixing channel and forms a concave cavity space between it and the rear wall of the main body of the two support plate outer edge frames. At the center of the front wall, there is a concave cavity partition that is perpendicular to the wall and extends along the height direction of the stabilizer. The front end of the concave cavity partition extends upstream to the outlet position of the support plate mixing channel and divides the concave cavity space into two independent areas arranged opposite to each other and connected to the support plate mixing channel in the width direction.

2. The support plate stabilizer structure for enhanced fuel atomization in an afterburner as described in claim 1, characterized in that: The support plate stabilizer structure also includes a plate-shaped stabilizer mounting base. The bottom of the first support plate outer edge frame, the second support plate outer edge frame, and the support plate tail edge frame are all fixedly connected to the stabilizer mounting base by welding.

3. The support plate stabilizer structure for enhanced fuel atomization in an afterburner as described in claim 1, characterized in that: The stabilizer structure further includes a top mounting bracket, which includes at least a mounting plate, two connecting plates, and a load-bearing plate. The tops of the outer edge frame of the first support plate, the outer edge frame of the second support plate, and the tail edge frame of the support plate are all fixedly connected to the bottom surface of the mounting plate by welding. The two connecting plates are welded to the left and right sides of the top surface of the mounting plate in a relatively opposite manner. The load-bearing plate is used to connect the heat shield and the casing of the engine combustion chamber, and the tops of the two connecting plates are welded and fixed to the bottom surface of the load-bearing plate.

4. The support plate stabilizer structure for enhancing fuel atomization in an afterburner according to any one of claims 1 to 3, characterized in that: The fan-shaped part of the outer edge frame of the support plate is a hollow structure, and its inner cavity is formed into a front edge cooling air cavity of the support plate that is connected to an external cooling air source. The front edge cooling air cavity of the support plate is arranged through the height direction of the fan-shaped part, and several cooling air holes that are connected to the front edge cooling air cavity of the support plate are evenly opened along the height direction on the outer wall and / or inner straight surface of the fan-shaped part.

5. The support plate stabilizer structure for enhanced fuel atomization in an afterburner as described in claim 4, characterized in that: The main body of the outer edge frame of the support plate is also provided with a fuel injector cooling air chamber. The fuel injector cooling air chamber is connected to an external cooling air source. It is arranged to run through the main body along the height direction and is located between the first fuel injector mounting hole and the second fuel injector mounting hole in the length direction of the stabilizer. Several cooling air holes that pass through the inner and / or outer walls of the main body are distributed along the height direction on the inner wall of the fuel injector cooling air chamber.

6. The support plate stabilizer structure for enhanced fuel atomization in an afterburner as described in claim 5, characterized in that: The main body of the outer edge frame of the support plate is also provided with a concave cooling air chamber that is connected to an external cooling air source. The chamber is arranged to run through the height of the main body, and several concave air holes that pass through the rear wall of the main body and are connected to the concave space are provided on its inner wall along the height direction.

7. The support plate stabilizer structure for enhanced fuel atomization in an afterburner as described in claim 6, characterized in that: The main body of the support plate tail edge frame is also provided with a tail edge cooling air chamber that runs through its entire height. The cooling air chamber is connected to an external cooling air source, and several support plate air holes that pass through the rear wall of the main body and communicate with the external environment are distributed along the height direction on its inner wall.

8. The support plate stabilizer structure for enhanced fuel atomization in an afterburner as described in claim 7, characterized in that: The tops of the cooling air chamber at the leading edge of the support plate, the cooling air chamber at the fuel injector rod, the cooling air chamber at the concave cavity, and the cooling air chamber at the trailing edge of the support plate are all connected to the outer bypass channel of the engine.

9. The support plate stabilizer structure for enhancing fuel atomization in an afterburner according to any one of claims 1 to 3, characterized in that: The concave fan-shaped surface of the outer edge frame of the two plates is machined with micro-groove textures distributed along the height direction to improve the adhesion of fuel on the concave fan-shaped surface, thereby forming a more stable oil film after the fuel impacts the concave fan-shaped surface.

10. The support plate stabilizer structure for enhancing fuel atomization in an afterburner according to any one of claims 1 to 3, characterized in that: The concave cavity partition is provided with guide vanes distributed along the height direction on both sides of the concave cavity partition to guide the airflow in the concave cavity to flow along both sides of the partition. The front edge of the concave cavity partition is processed into a cone shape to guide the airflow in the mixing channel of the support plate to smoothly enter the concave cavity side areas.

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