Inner wall components for particle separators and aircraft engines

Abstract

This invention discloses an inner wall assembly for a particle separator and an aero-engine, comprising a first outer wall layer disposed on the windward flow channel surface, a second outer wall layer disposed on the leeward flow channel surface, an inner wall layer disposed on the inner side, a sandwich layer disposed between the first outer wall layer and the inner wall layer, a first mounting edge, and a second mounting edge. The first end of the first outer wall layer, the first end of the sandwich layer, and the first end of the inner wall layer are mounted on the first mounting edge. The second end of the sandwich layer and the second end of the first outer wall layer are respectively connected to the first end of the second outer wall layer. The second end of the second outer wall layer and the second end of the inner wall layer are respectively mounted on the second mounting edge. The second mounting edge is provided with a first air bleed structure for introducing anti-icing hot gas into the inner wall assembly. A first air bleed chamber is formed between the second outer wall layer and the inner wall layer, a second air bleed chamber is formed between the sandwich layer and the inner wall layer, and a third air bleed chamber is formed between the sandwich layer and the first outer wall layer. The sandwich layer is provided with a second air bleed structure for guiding the anti-icing hot gas in the second air bleed chamber to the third air bleed chamber.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and in particular, to an inner wall assembly for a particle separator. Furthermore, this invention also relates to an aero-engine comprising the aforementioned inner wall assembly for a particle separator. Background Technology

[0002] Helicopters often need to take off, land, and hover in environments with heavy dust and sand, such as mountainous areas, deserts, icy surfaces, and sea surfaces. Large amounts of sand, dust, snow, and other foreign matter, or sea salt spray, are sucked into the engine. Without prior protective measures, this dust and sand can severely damage the helicopter engine, causing compressor blade erosion and resulting in deterioration of engine performance, leading to reduced power, increased fuel consumption, and ultimately a significantly shortened engine lifespan. Therefore, an intake protection device—a particle separator—needs to be added to the front of the engine to protect it, ensuring operational stability and extending its service life in dusty and sandy working environments. Practice has shown that engines equipped with particle separators have a lifespan more than 10 times longer than those without.

[0003] Integral inertial particle separators are mainly available in structures with pre-swirling blades and bladeless designs. The working principle of an integral inertial particle separator is based on the difference in inertial force generated when sand and dust particles turn within a curved flow channel. Solid particles with greater inertial force are thrown to the periphery and discharged through the outer cleaning channel. During this process, the windward side of the arched inner flow channel of the particle separator bears a large amount of sand and dust scouring, while the leeward side only experiences a small amount of sand and dust collisions. For particle separators with pre-swirling blades, the blades give the air entering the particle separator flow channel and its contained foreign matter a circumferential velocity. Under the action of inertia, larger foreign matter is thrown against the outer wall of the flow channel and enters the cleaning flow, eventually being discharged outside the machine. Compared to particle separators with blades, bladeless integral particle separators have a relatively simple structure, lighter weight, and lower cost. However, the internal flow channel is steeper to provide particles with greater centrifugal force, causing them to be thrown to the periphery, thus concentrating the particles for discharge through the outer cleaning channel. Due to its steep, hump-shaped internal flow channel design, the bladeless particle separator has a large frontal area, making it more prone to icing in low-temperature environments. The intake of ice will negatively impact engine efficiency. Therefore, bladeless particle separators need to possess a certain degree of anti-icing capability. However, existing technologies often employ a single anti-icing hot air channel design. This involves creating a cavity within the inner wall components to allow hot air drawn from the compressor to pass through, achieving anti-icing at low temperatures through heat exchange between the hot air and the cold wall surface.

[0004] To meet the design requirements of the engine's overall structure and function under special operating conditions, the inner flow channel wall needs to have anti-icing capabilities. Existing designs often employ a single anti-icing hot gas channel, where hot gas first enters the component from the inlet of the hot gas channel at the rear end, heats the flow channel wall through the internal cavity of the component, and then enters the main flow channel from the outlet of the hot gas channel at the front end of the component. Although this meets the functional requirements, it has drawbacks such as a small bonding surface at the front end of the component, lower overall structural strength, and the outgoing hot gas potentially affecting the main flow channel. Summary of the Invention

[0005] This invention provides an inner wall component for a particle separator and an aero-engine to solve the technical problems of poor heat exchange effect, low structural strength, and induced draft affecting the mainstream in the design of single anti-icing hot gas channels of bladeless particle separators in the prior art.

[0006] According to one aspect of the present invention, an inner wall assembly for a particle separator is provided, comprising a first outer wall layer disposed on the windward flow channel surface of the particle separator and having a shape matching the corresponding position of the inner flow channel of the particle separator; a second outer wall layer disposed on the leeward flow channel surface of the particle separator and having a shape matching the corresponding position of the inner flow channel of the particle separator; an inner wall layer disposed on the inner side of the inner wall assembly; a sandwich layer disposed between the first outer wall layer and the inner wall layer; a first mounting edge disposed at a first end of the inner wall assembly; and a second mounting edge disposed at a second end of the inner wall assembly. The first end of the first outer wall layer, the first end of the sandwich layer, and the first end of the inner wall layer are mounted on the first mounting edge, and the second end of the sandwich layer and the second end of the first outer wall layer are mounted on the first mounting edge. The first end of the second outer wall layer and the second end of the inner wall layer are respectively connected to the first end of the second outer wall layer. The second end of the second outer wall layer and the second end of the inner wall layer are respectively installed on the second mounting edge. The second mounting edge is provided with a first air intake structure for introducing anti-icing hot air into the inner wall assembly. A first air intake cavity communicating with the first air intake structure is formed between the second outer wall layer and the inner wall layer. A second air intake cavity communicating with the first air intake cavity is formed between the interlayer and the inner wall layer. A third air intake cavity is formed between the interlayer and the first outer wall layer. The interlayer is provided with a second air intake structure for guiding the anti-icing hot air in the second air intake cavity to the third air intake cavity. A third air intake structure is formed at the connection position between the first outer wall layer and the second outer wall layer for guiding the anti-icing hot air in the third air intake cavity to the main flow channel.

[0007] As a further improvement to the above technical solution, the outer surface of the interlayer is provided with a first support rib along the axial direction, and a plurality of the first support ribs are evenly distributed circumferentially along the outer surface of the interlayer; the outer surface of the inner wall layer is provided with a second support rib along the axial direction, and a plurality of the second support ribs are evenly distributed circumferentially along the outer surface of the inner wall layer.

[0008] As a further improvement to the above technical solution, the circumferential distribution positions of the first support rib and the second support rib are matched, and the first outer wall layer, the interlayer, and the inner wall layer are fitted with fasteners corresponding to the circumferential positions of the first support rib and the second support rib.

[0009] As a further improvement to the above technical solution, a first support boss is formed on the outer surface of the first end of the second outer wall layer. A plurality of first support bosses are evenly distributed along the circumference of the second outer wall layer. The first support bosses are used to support the inner wall of the second end of the first outer wall layer. The inner wall of the first outer wall layer, the outer wall of the second outer wall layer, and two adjacent first support bosses enclose each other to form the third air-drawing structure.

[0010] As a further improvement to the above technical solution, a second support protrusion is formed on the outer surface of the inner wall layer corresponding to the connection position of the interlayer and the second outer wall layer. A plurality of second support protrusions are evenly distributed along the circumference of the inner wall layer. The second support protrusions are used to support the second end inner wall of the interlayer. The inner wall of the interlayer, the outer wall of the inner wall layer and two adjacent second support protrusions enclose and form an airflow channel, so that the first air intake chamber and the second air intake chamber are connected.

[0011] As a further improvement to the above technical solution, the positions of the first support boss and the second support boss are matched, and the first outer wall layer, the second outer wall layer, the interlayer, and the inner wall layer are fitted with fasteners corresponding to the positions of the first support boss.

[0012] As a further improvement to the above technical solution, the thickness of the first outer wall layer is 0.75-0.85mm, the thickness of the interlayer is 1.2-1.5mm, and the thickness of the inner wall layer is 1.2-1.5mm.

[0013] As a further improvement to the above technical solution, the cross-sectional area of ​​the first air intake chamber gradually decreases from the second end to the first end.

[0014] As a further improvement to the above technical solution, the first mounting edge, the second mounting edge, and the first outer wall layer are made of metal materials, while the interlayer, the inner wall layer, and the second outer wall layer are made of composite materials.

[0015] According to another aspect of the invention, an aircraft engine is also provided, including a particle separator comprising the aforementioned inner wall assembly for the particle separator.

[0016] The present invention has the following beneficial effects:

[0017] This inner wall assembly is positioned at the hump-shaped location on the inner surface of the particle separator's flow channel. The first and second mounting edges connect to the inner surface, respectively. By separately configuring a first outer wall layer on the windward flow channel surface and a second outer wall layer on the leeward flow channel surface, it can be manufactured using different materials to meet varying impact resistance and weight reduction requirements, ensuring functional application while optimizing overall weight. Based on the split outer wall structure, a first and second outer wall layer are configured. A sandwich layer is provided between the inner wall layer and the first outer wall layer, and a second air intake structure is installed within this sandwich layer. Hot air is introduced from the first air intake structure on the second mounting edge via a compressor into the first and second air intake chambers, and then through the sandwich layer... The second air intake structure guides the third air intake chamber between the first outer wall layer and the interlayer. The interlayer separates and compresses the space between the first outer wall layer and the inner wall layer, increasing the airflow velocity, enhancing convective heat transfer, and improving the heat transfer effect. When the hot air in the second air intake chamber enters the third air intake chamber through the second air intake structure, it simultaneously generates a jet impact on the first outer wall layer, further improving the anti-icing effect of the first outer wall layer. Its anti-icing capability is specifically optimized, effectively improving the impact resistance and anti-icing capability of the first outer wall layer, which is the main impact area and prone to icing. The air is discharged through the third air intake structure, and its exhaust direction is the same as that of the mainstream, thus mixing with the mainstream and effectively avoiding affecting the mainstream.

[0018] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, 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. In the drawings:

[0020] Figure 1 This is a schematic diagram of the particle separator according to a preferred embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the inner wall assembly according to a preferred embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view of the inner wall assembly according to a preferred embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the air intake of the inner wall assembly in a preferred embodiment of the present invention. Figure 1 ;

[0024] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0025] Figure 6 This is a schematic diagram of the sandwich structure of a preferred embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the inner wall layer of a preferred embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the air duct of the inner wall assembly in a preferred embodiment of the present invention. Figure 2 ;

[0028] Figure 9 This is a schematic diagram of the air duct of the inner wall assembly in a preferred embodiment of the present invention. Figure 3 .

[0029] Legend:

[0030] 1. First mounting edge; 2. First outer wall layer; 3. Interlayer; 4. Inner wall layer; 5. Second outer wall layer; 6. Partition; 7. Second mounting edge; 8. Rivet; 9. First support rib; 10. Second air intake structure; 11. Second support rib; 12. First support boss; 13. First air intake structure; 14. Third air intake structure. Detailed Implementation

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0032] like Figures 1 to 9 As shown, the inner wall assembly for the particle separator in this embodiment includes a first outer wall layer 2 disposed on the windward flow channel surface of the particle separator and matching the shape of the corresponding position of the inner flow channel of the particle separator; a second outer wall layer 5 disposed on the leeward flow channel surface of the particle separator and matching the shape of the corresponding position of the inner flow channel of the particle separator; an inner wall layer 4 disposed on the inner side of the inner wall assembly; a sandwich layer 3 disposed between the first outer wall layer 2 and the inner wall layer 4; a first mounting edge 1 disposed at the first end of the inner wall assembly; and a second mounting edge 7 disposed at the second end of the inner wall assembly. The first end of the first outer wall layer 2, the first end of the sandwich layer 3, and the first end of the inner wall layer 4 are mounted on the first mounting edge 1. The second end of the sandwich layer 3 and the second end of the first outer wall layer 2 are respectively mounted on the first mounting edge 1. The first end of the second outer wall layer 5 is connected, and the second end of the second outer wall layer 5 and the second end of the inner wall layer 4 are respectively installed on the second mounting edge; the second mounting edge 7 is provided with a first air intake structure 13 for introducing anti-icing hot air into the inner wall assembly; a first air intake cavity is formed between the second outer wall layer 5 and the inner wall layer 4 and communicates with the first air intake structure 13; a second air intake cavity is formed between the interlayer 3 and the inner wall layer 4 and communicates with the first air intake cavity; a third air intake cavity is formed between the interlayer 3 and the first outer wall layer 2; the interlayer 3 is provided with a second air intake structure 10 for guiding the anti-icing hot air in the second air intake cavity to the third air intake cavity; a third air intake structure 14 is formed at the connection position of the first outer wall layer 2 and the second outer wall layer 5 for guiding the anti-icing hot air in the third air intake cavity out to the main channel.

[0033] In this embodiment, the particle separator used in the inner wall assembly is a bladeless, integral inertial particle separator. The first outer wall layer 2 matches the windward side of the inner profile of the particle separator's inner flow channel and needs to withstand the erosion and impact of foreign objects such as sand and dust. However, due to space constraints and heat transfer requirements, the wall thickness of the windward flow channel surface is designed to be relatively thin. Therefore, the first outer wall layer 2 is made of metal, preferably titanium alloy, to improve its resistance to sand and dust abrasion and foreign object impact. In one embodiment, the first mounting edge 1, the second mounting edge 7, and the first outer wall layer 2 are all made of metal. Layer 3, inner wall layer 4, and second outer wall layer 5 are made of composite materials. It should be noted that the use of composite materials to replace metal parts in interlayer 3, inner wall layer 4, and second outer wall layer 5 fully utilizes the lightweight and high strength characteristics of composite materials to meet functional requirements while significantly reducing the overall weight of the component. On the other hand, the first outer wall layer 2 is a location that is prone to freezing at low temperatures. Since metal materials have good thermal conductivity and higher heat exchange efficiency than composite materials, the temperature of the first outer wall is higher. The hot air introduced from the compressor has a better heating effect on the first outer wall layer 2, effectively improving the anti-icing effect of the component.

[0034] Understandably, this inner wall assembly is positioned at the hump-shaped location on the inner surface of the particle separator's flow channel. The first mounting edge 1 and the second mounting edge 7 are respectively connected to the inner surface. By separately setting a first outer wall layer 2 on the windward flow channel surface and a second outer wall layer 5 on the leeward flow channel surface, each part can be manufactured based on different materials according to different impact resistance and weight reduction requirements, ensuring functional application while optimizing the overall weight. Based on the split outer wall structure, the first outer wall layer 2 and the second outer wall layer 5 are set. An interlayer 3 is set between the inner wall layer 4 and the first outer wall layer 2, and a second air intake structure 10 is set in the interlayer 3. Hot air is introduced from the compressor into the first air intake chamber and the second air intake chamber through the first air intake structure 13 on the second mounting edge 7. The air is then guided by the second air intake structure 10 of the interlayer 3 to the third air intake chamber between the first outer wall layer 2 and the interlayer 3. The interlayer 3 separates and compresses the space between the first outer wall layer 2 and the inner wall layer 4, increasing the airflow velocity, strengthening convective heat transfer, and improving the heat transfer effect. When the hot air in the second air intake chamber enters the third air intake chamber through the second air intake structure 10, it simultaneously generates a jet impact on the first outer wall layer 2, further improving the anti-icing effect of the first outer wall layer 2. Its anti-icing capability is specifically optimized, effectively improving the impact resistance and anti-icing capability of the first outer wall layer 2, which is the main impact area and the location prone to icing. The air is discharged through the third air intake structure 14, and its exhaust direction is the same as the mainstream, thus mixing with the mainstream and effectively avoiding affecting the mainstream.

[0035] It should be noted that the first air intake structure 13 is a strip-shaped air intake groove opened along the second mounting edge 7 in the circumferential direction, and multiple air intake grooves are evenly distributed along the circumference of the second mounting edge 7; the second air intake structure 10 is an air intake hole evenly distributed in the interlayer 3, which guides the hot air in the second air intake chamber to the third air intake chamber; the air intake hole is preferably arranged perpendicular to the surface of the interlayer 3 to form a jet to the first outer wall layer 2, thereby improving the anti-icing effect.

[0036] In one embodiment, the cross-sectional area of ​​the first air intake chamber gradually decreases from the second end to the first end to increase the flow rate of the introduced hot air, further increasing the flow rate of the introduced hot air in the second air intake structure 10 and improving the jet effect; similarly, the second air intake chamber and the third air intake chamber can also be designed with a cross-section that gradually decreases along the air intake direction.

[0037] In one embodiment, a first support rib 9 is provided axially on the outer surface of the interlayer 3, and multiple first support ribs 9 are evenly distributed circumferentially along the outer surface of the interlayer 3; a second support rib 11 is provided axially on the outer surface of the inner wall layer 4, and multiple second support ribs 11 are evenly distributed circumferentially along the outer surface of the inner wall layer 4. The first support ribs 9 support the inner surface of the first outer wall layer 2, ensuring the cavity structure of the third air intake chamber and guiding the airflow; similarly, the second support ribs 11 support the inner surface of the interlayer 3, realizing the cavity structure of the second air intake chamber and guiding the airflow; a circumferentially evenly distributed partition 6 is provided between the inner wall layer 4 and the second outer wall layer 5 for support, ensuring the cavity structure of the first air intake chamber and guiding the airflow.

[0038] Furthermore, the circumferential distribution positions of the first support rib 9 and the second support rib 11 are matched. The first outer wall layer 2, the interlayer 3, and the inner wall layer 4 are fitted with fasteners corresponding to the circumferential positions of the first support rib 9 and the second support rib 11. The fasteners are rivets 8 and sealant. Based on the arrangement of the first support rib 9 and the second support rib 11, the multi-layer structure at the front end of this inner wall component is realized. The multi-layer structure is connected and fixed by rivets 8 and sealant. The connection method is relatively simple, reducing the manufacturing difficulty and increasing the structural strength of the entire part while improving the feasibility of the process.

[0039] In one embodiment, a first support boss 12 is formed on the outer surface of the first end of the second outer wall layer 5. Multiple first support bosses 12 are evenly distributed around the circumference of the second outer wall layer 5. The first support bosses 12 are used to support the inner wall of the second end of the first outer wall layer 2. The inner wall of the first outer wall layer 2, the outer wall of the second outer wall layer 5, and two adjacent first support bosses 12 enclose each other to form an air outlet groove, i.e., a third air intake structure 14. Similarly, a second support boss is formed on the outer surface of the inner wall layer 4 at the connection position between the interlayer 3 and the second outer wall layer 5. Multiple second support bosses are evenly distributed around the circumference of the inner wall layer 4. The second support bosses are used to support the inner wall of the second end of the interlayer 3. The inner wall of the interlayer 3, the outer wall of the inner wall layer 4, and two adjacent second support bosses enclose each other to form an airflow channel, so that the first air intake chamber and the second air intake chamber are connected.

[0040] Furthermore, the positions of the first support boss 12 and the second support boss are matched, and the first outer wall layer 2, the second outer wall layer 5, the interlayer 3 and the inner wall layer 4 are fixed with fasteners corresponding to the positions of the first support boss 12. By setting the support bosses, the first outer wall layer 2, the second outer wall layer 5, the interlayer 3 and the inner wall layer 4 are further stabilized and fixed, ensuring the communication between the first air intake chamber and the second air intake chamber and the stability of the exhaust channel of the third air intake structure 14. The fasteners are rivets 8 and sealant. The multi-layer structure is connected and fixed by rivets 8 and sealant. The connection method is relatively simple, reducing the manufacturing difficulty and increasing the structural strength of the entire part while improving the feasibility of the process.

[0041] On the other hand, the first end of the interlayer 3 is bent inward to fit the surface of the first mounting edge 1, and the first end of the inner wall layer 4 is bent outward to fit the surface of the first mounting edge 1. The bent portions of the interlayer 3 and the inner wall layer 4 overlap and fit the surface of the first mounting edge 1. The bent portions of both and the first mounting edge 1 are also uniformly distributed with fasteners along the circumference, i.e., rivets 8 are inserted and fixed with sealant. The second end of the second outer wall layer 5 and the second end of the inner wall layer 4 are overlapped with the two ends of the second mounting edge 7 to avoid interference with the first air intake structure 13.

[0042] In one embodiment, the thickness of the first outer wall layer 2 is 0.75-0.85 mm, usually around 0.8 mm in practice; the thickness of the interlayer 3 is 1.2-1.5 mm; the thickness of the inner wall layer 4 is 1.2-1.5 mm; and the surface finish of the particle separator flow channel should not exceed Ra3.2 to ensure minimal airflow loss.

[0043] On the other hand, this preferred embodiment also provides an aero-engine including a particle separator, which utilizes the aforementioned inner wall assembly for the particle separator.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An inner wall assembly for a particle separator, characterized in that, The assembly includes a first outer wall layer (2) disposed on the windward flow channel surface of the particle separator and matching the shape of the corresponding position of the inner flow channel of the particle separator; a second outer wall layer (5) disposed on the leeward flow channel surface of the particle separator and matching the shape of the corresponding position of the corresponding position of the inner flow channel of the particle separator; an inner wall layer (4) disposed on the inner side of the inner wall assembly; a sandwich layer (3) disposed between the first outer wall layer (2) and the inner wall layer (4); a first mounting edge (1) disposed at the first end of the inner wall assembly; and a second mounting edge (7) disposed at the second end of the inner wall assembly. The first end of the first outer wall layer (2), the first end of the sandwich layer (3), and the first end of the inner wall layer (4) are mounted on the first mounting edge (1). The second end of the sandwich layer (3) and the second end of the first outer wall layer (2) are respectively connected to the first end of the second outer wall layer (5). The second end of the second outer wall layer (5) and the second end of the inner wall layer (4) are respectively installed on the second mounting edge; the second mounting edge (7) is provided with a first air intake structure (13) for introducing anti-icing hot gas into the inner wall assembly; a first air intake cavity is formed between the second outer wall layer (5) and the inner wall layer (4) and communicates with the first air intake structure (13); a second air intake cavity is formed between the interlayer (3) and the inner wall layer (4) and communicates with the first air intake cavity; a third air intake cavity is formed between the interlayer (3) and the first outer wall layer (2); the interlayer (3) is provided with a second air intake structure (10) for guiding the anti-icing hot gas in the second air intake cavity to the third air intake cavity; a third air intake structure (14) is formed at the junction of the first outer wall layer (2) and the second outer wall layer (5) for guiding the anti-icing hot gas in the third air intake cavity out to the main channel.

2. The inner wall assembly for a particle separator according to claim 1, characterized in that, The outer surface of the interlayer (3) is provided with a first support rib (9) along the axial direction, and a plurality of the first support ribs (9) are evenly distributed circumferentially along the outer surface of the interlayer (3); the outer surface of the inner wall layer (4) is provided with a second support rib (11) along the axial direction, and a plurality of the second support ribs (11) are evenly distributed circumferentially along the outer surface of the inner wall layer (4).

3. The inner wall assembly for a particle separator according to claim 2, characterized in that, The first support rib (9) and the second support rib (11) are circumferentially distributed and positioned. The first outer wall layer (2), the interlayer (3), and the inner wall layer (4) are fitted with fasteners corresponding to the circumferential positions of the first support rib (9) and the second support rib (11).

4. The inner wall assembly for a particle separator according to claim 1, characterized in that, A first support boss (12) is formed on the outer surface of the first end of the second outer wall layer (5). A plurality of first support bosses (12) are evenly distributed along the circumference of the second outer wall layer (5). The first support bosses (12) are used to support the inner wall of the second end of the first outer wall layer (2). The inner wall of the first outer wall layer (2), the outer wall of the second outer wall layer (5), and two adjacent first support bosses (12) enclose and form the third air intake structure (14).

5. The inner wall assembly for a particle separator according to claim 4, characterized in that, The outer surface of the inner wall layer (4) protrudes to form a second support protrusion at the connection position between the interlayer (3) and the second outer wall layer (5). Multiple second support protrusions are evenly distributed along the circumference of the inner wall layer (4). The second support protrusions are used to support the second end inner wall of the interlayer (3). The inner wall of the interlayer (3), the outer wall of the inner wall layer (4), and two adjacent second support protrusions enclose and form an airflow channel, so that the first air intake chamber and the second air intake chamber are connected.

6. The inner wall assembly for a particle separator according to claim 5, characterized in that, The first support boss (12) is positioned to match the second support boss, and the first outer wall layer (2), the second outer wall layer (5), the interlayer (3), and the inner wall layer (4) are fitted with fasteners corresponding to the positions of the first support boss (12).

7. The inner wall assembly for a particle separator according to any one of claims 1-6, characterized in that, The thickness of the first outer wall layer (2) is 0.75-0.85 mm, the thickness of the interlayer (3) is 1.2-1.5 mm, and the thickness of the inner wall layer (4) is 1.2-1.5 mm.

8. The inner wall assembly for a particle separator according to any one of claims 1-6, characterized in that, The cross-sectional area of ​​the first air intake chamber gradually decreases from the second end to the first end.

9. The inner wall assembly for a particle separator according to any one of claims 1-6, characterized in that, The first mounting edge (1), the second mounting edge (7) and the first outer wall layer (2) are made of metal material, and the interlayer (3), the inner wall layer (4) and the second outer wall layer (5) are made of composite material.

10. An aircraft engine, characterized in that, Includes a particle separator, which utilizes the inner wall assembly for a particle separator as described in any one of claims 1-9.

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