Engine combustion chamber with outlet flow pre-swirl

Abstract

The application relates to an engine combustion chamber with an outlet flow pre-rotation, which comprises a casing, a flame tube and a flow guide. The casing has a containing cavity, one end of the containing cavity is provided with an inlet, and the other end is provided with an outlet. The flame tube is arranged in the containing cavity. The inlet is provided with a front flow guide, and / or a rear flow guide is arranged on the tube wall of the flame tube; the front flow guide and the rear flow guide are used to make the flow of the outlet flow into a turbine guide vane or directly into a turbine blade at a certain angle with the engine axis direction. That is, through the flow guide of the application, the engine combustion chamber outlet gas can flow into the turbine guide vane or directly into the turbine blade along a preset direction, thereby greatly reducing the load of the turbine guide vane, that is, the consistency of the turbine guide vane and the strength design thereof can be reduced, the design difficulty of the turbine guide vane is reduced, the structure of the turbine guide vane is simplified, and the design difficulty and the weight of the turbine are reduced.

Description

Technical Field

[0001] This application relates to the field of engine combustion chamber technology, and in particular to an engine combustion chamber with outlet flow pre-swirl. Background Technology

[0002] The engine combustion chamber is located in front of the turbine. Compressed air from the compressor enters the engine combustion chamber, and fuel is injected into the combustion chamber at the same time. The combustion of fuel can improve the work capacity of the compressed air so as to drive the turbine to do work.

[0003] An engine combustion chamber typically includes a diffuser, flame tube, swirler, and nozzles. The flow direction of the combustion gases exiting the combustion chamber is relatively chaotic, requiring a turbine guide to direct the flow and accelerate the gases before they enter the turbine. Therefore, the turbine guide bears significant aerodynamic and thermal loads, necessitating substantial consistency, strength, and cooling gas consumption design. Summary of the Invention

[0004] Therefore, it is necessary to provide an engine combustion chamber with outlet flow pre-swirl to address the issues that turbine guide vanes need to bear large aerodynamic and temperature loads, and require large consistency design, strength design, and cold air consumption.

[0005] An engine combustion chamber with outlet flow pre-swirl, the engine combustion chamber comprising:

[0006] A housing, wherein the housing has a receiving cavity, one end of which has an inlet and the other end has an outlet;

[0007] The flame tube is disposed within the receiving cavity;

[0008] The inlet is provided with a front guide vane, and / or the flame tube is provided with a rear guide vane on its wall;

[0009] The front deflector is used to ensure that the incoming flow from the outlet flows into the turbine guide at a certain angle to the engine axis or directly into the turbine blades, and the rear deflector is used to ensure that the incoming flow from the outlet flows into the turbine guide at a certain angle to the engine axis or directly into the turbine blades.

[0010] In one embodiment, the engine combustion chamber is an annular combustion chamber, the casing includes an inner casing and an outer casing located around the inner casing, and the receiving cavity is formed between the inner casing and the outer casing; the flame tube includes an inner cylinder wall and an outer cylinder wall located around the inner cylinder wall.

[0011] In one embodiment, the rear guide vane is provided on the inner cylinder wall and the outer cylinder wall respectively, and the cooling holes are provided on the inner cylinder wall and the outer cylinder wall respectively;

[0012] The engine combustion chamber includes an intake cyclone separator disposed between the inner cylinder wall and the outer cylinder wall. The intake cyclone separator is located at one end of the inner cylinder wall and the outer cylinder wall near the inlet. An outer ring is formed between the outer casing and the outer cylinder wall, and an inner ring is formed between the inner casing and the inner cylinder wall.

[0013] The incoming flow from the inlet is divided into three paths: the first path enters the outer ring of the combustion chamber and then enters the flame tube through the rear guide and cooling holes on the outer cylinder wall; the second path enters the flame tube through the intake swirl diffuser; and the third path enters the inner ring of the combustion chamber and then enters the flame tube through the rear guide and cooling holes on the inner cylinder wall.

[0014] In one embodiment, the rear guide tube includes a plurality of guide tubes arranged in a ring around the axial direction of the flame tube on the tube wall, and each guide tube passes through the tube wall of the flame tube and extends into the flame tube.

[0015] In one embodiment, the rear guide vane includes a plurality of guide vanes disposed on the cylinder wall, the plurality of guide vanes being arranged in a ring around the axial direction of the flame tube.

[0016] In one embodiment, the flow direction of the rear diffuser is inclined to the circumferential tangential direction of the flame tube.

[0017] In one embodiment, the flow direction of the rear guide is inclined to the axial direction of the flame tube.

[0018] In one embodiment, the air inlet cyclone is inclined axially to the flame tube.

[0019] In one embodiment, the axial direction of the air inlet cyclone is inclined to the axial direction of the flame tube, and the axial directions of the air inlet cyclone and the axial direction of the rear guide are both inclined to the same side relative to the axial direction of the flame tube.

[0020] In one embodiment, the front deflector includes a plurality of guide vanes surrounding the inlet of the engine combustion chamber, the engine combustion chamber including a fuel injector and a flame stabilizer;

[0021] Along the direction from the inlet to the outlet, the front guide vane, the fuel injector, and the flame stabilizer are arranged in sequence; or, the guide vane has multiple fuel injection ports, the fuel injector is connected to the fuel injection ports, the fuel injection ports are used to inject fuel, and the guide vane is also used as a flame stabilizer or the jet ejected from the guide vane is used to form a flame stabilizer.

[0022] In one embodiment, the engine combustion chamber is a single-tube combustion chamber or an annular combustion chamber, the axial direction of the flame tube is inclined to the axial direction of the engine combustion chamber, and the axial direction of the flame tube is perpendicular to the radial direction of the engine combustion chamber.

[0023] In one embodiment, the combustion chamber includes:

[0024] A housing, wherein the housing has a receiving cavity, one end of which has an inlet and the other end has an outlet;

[0025] The flame tube is disposed within the receiving cavity;

[0026] An inlet cyclone separator is located at the inlet position;

[0027] When the engine combustion chamber is an annular combustion chamber, the axial direction of the intake cyclone is inclined to the axial direction of the engine;

[0028] When the engine combustion chamber is a single-tube combustion chamber or annular tube combustion chamber, the axial direction of the intake cyclone is inclined to the axial direction of the engine, and the axial direction of the flame tube is inclined to the axial direction of the engine.

[0029] In the aforementioned engine combustion chamber with pre-swirling flow at the outlet, when a front guide vane is installed at the inlet, the incoming flow enters the combustion chamber from the inlet. Under the guidance of the front guide vane, the incoming flow flows into the combustion chamber at a certain angle to the engine axis. At this time, fuel is injected from the fuel injector, and the fuel and air burn in the flame tube. The high-temperature combustion gas, also carried by the incoming flow, flows out of the combustion chamber at a certain angle to the engine axis and flows into the turbine guide vane or directly into the turbine blades, driving the turbine to do work. When a rear guide vane is installed on the wall of the flame tube, the incoming flow enters the flame tube through the rear guide vane on the wall of the flame tube. Similarly, it carries the high-temperature combustion gas and flows out of the combustion chamber from the outlet along a pre-swirling direction at a certain angle to the engine axis, entering the turbine guide vane or directly into the turbine blades, driving the turbine to do work. When a front guide vane is installed at the inlet and a rear guide vane is installed on the wall of the flame tube, the high-temperature combustion gas can also flow out of the engine combustion chamber outlet along a pre-swirling direction at a certain angle to the engine axis. That is, this application can change the flow direction of the combustion gas at the engine combustion chamber outlet, so that the gas can flow into the turbine guide vane or directly into the turbine blades, significantly reducing the load on the turbine guide vane. This, in turn, reduces the density and strength design of the turbine guide vane, lowers the design difficulty of the turbine guide vane, simplifies the turbine guide vane structure, and eliminates the turbine guide vane, thereby reducing the design difficulty and weight of the turbine. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a structure in one embodiment where the flow guide is installed on the wall of the flame tube.

[0031] Figure 2 This is a schematic diagram of the distribution structure of the guides on the cross-section of the flame tube along the axial direction in one embodiment.

[0032] Figure 3 This is a schematic diagram of a flow deflector installed at the inlet of an engine combustion chamber in one embodiment.

[0033] Figure 4 This is a schematic diagram of the inclined flame tube in a single-tube combustion chamber in one embodiment.

[0034] Figure 5 This is a schematic diagram of the engine combustion chamber structure when the intake cyclone is tilted in one embodiment.

[0035] Reference numerals: 110, Inner casing; 120, Outer casing; 130, Inlet swirl diffuser; 140, Inner ring of the combustion chamber; 150, Outer ring of the combustion chamber; 160, Inlet; 170, Outlet; 200, Flame tube; 210, Inner tube wall; 220, Outer tube wall; 310, Front diffuser; 320, Rear diffuser; 400, Diffuser; 500, Flame stabilizer; 600, Fuel injector. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] See Figure 1 and Figure 3This application discloses an engine combustion chamber with a pre-swirling outlet 170. The engine combustion chamber includes a casing, a flame tube 200, and a flow deflector. The casing has a receiving cavity with an inlet 160 at one end and an outlet 170 at the other end. The flame tube 200 is disposed within the receiving cavity. A front flow deflector 310 is provided at the inlet 160, and / or a rear flow deflector 320 is provided on the wall of the flame tube 200. The front flow deflector 310 is used to ensure that the incoming flow from the outlet 170 flows into the turbine guide vane or directly into the turbine blades at a certain angle to the engine axis. The rear flow deflector 320 is used to ensure that the incoming flow from the outlet 170 flows into the turbine guide vane or directly into the turbine blades at a certain angle to the engine axis.

[0043] Air and / or fuel gas enter the engine combustion chamber from inlet 160° to burn with fuel. For ease of description, air and / or fuel gas will be collectively referred to as the incoming flow. The angle between the direction of the incoming flow and the engine axis is -60° to +60°, which can be adjusted according to the guide direction of the turbine guide vane or the turbine blade guide direction. The direction of the incoming flow can be the same as or different from the guide direction of the turbine guide vane or the turbine blade guide direction, as long as the axial impact of the incoming flow on the turbine guide vane is reduced.

[0044] In this embodiment, when the inlet 160 is equipped with a front guide vane 310, the incoming flow enters the engine combustion chamber from the inlet 160. Under the guidance of the front guide vane 310, the incoming flow flows into the engine combustion chamber at a certain angle to the engine axis. At this time, fuel is injected from the fuel injector 600, and the fuel and air burn in the flame tube 200. The high-temperature combustion gas can also flow out of the engine combustion chamber outlet 170 at a certain angle to the engine axis under the entrainment effect of the incoming flow, and flows into the turbine guide vane or directly into the turbine blades to drive the turbine to do work. When the flame tube 200 is equipped with a rear guide vane 320, the incoming flow enters the flame tube 200 from the rear guide vane 320 on the wall of the flame tube 200. It can also carry the high-temperature combustion gas generated by combustion, and flow out of the engine combustion chamber outlet 170 along a pre-swirl direction at a certain angle to the engine axis, and enter the turbine guide vane or directly into the turbine blades to drive the turbine to do work. When the inlet 160 is equipped with a front guide vane 310, and the flame tube 200 is equipped with a rear guide vane 320, the high-temperature combustion gas can also flow out of the engine combustion chamber outlet 170 along a pre-swirl direction at a certain angle to the engine axis. That is, this application can change the flow direction of the combustion gas at the engine combustion chamber outlet 170, so that the gas can flow into the turbine guide vane or directly into the turbine blades, significantly reducing the load on the turbine guide vane, thereby reducing the density and strength design of the turbine guide vane, lowering the design difficulty of the turbine guide vane, simplifying the turbine guide vane structure, and eliminating the turbine guide vane, thus reducing the design difficulty and weight of the turbine.

[0045] For ease of description below, the direction in which the incoming flow forms a certain angle with the engine axis is defined as the preset incoming flow direction.

[0046] Combination Figure 1 In some embodiments, the engine combustion chamber is an annular combustion chamber, the casing includes an inner casing 110 and an outer casing 120 located around the inner casing 110, and a receiving cavity is formed between the inner casing 110 and the outer casing 120; the flame tube 200 includes an inner tube wall 210 and an outer tube wall 220 located around the inner tube wall 210.

[0047] Furthermore, rear guide vanes 320 are respectively provided on the inner cylinder wall 210 and the outer cylinder wall 220, and cooling holes are also respectively provided on the inner cylinder wall 210 and the outer cylinder wall 220; the engine combustion chamber includes an intake cyclone separator 130 disposed between the inner cylinder wall 210 and the outer cylinder wall 220, the intake cyclone separator 130 being located at the end of the inner cylinder wall 210 and the outer cylinder wall 220 near the inlet 160, an outer ring 150 of the combustion chamber is formed between the outer casing 120 and the outer cylinder wall 220, and the inner casing A combustion chamber ring 140 is formed between 110 and the inner cylinder wall 210; the incoming flow from the inlet 160 is divided into three paths: the first path enters the outer ring 150 of the combustion chamber and enters the flame tube 200 through the rear guide 320 and cooling holes on the outer cylinder wall 220; the second path enters the flame tube 200 through the intake swirl diffuser 130; and the third path enters the combustion chamber ring 140 and enters the flame tube 200 through the rear guide 320 and cooling holes on the inner cylinder wall 210.

[0048] In this embodiment, the engine combustion chamber includes a fuel injector 600 disposed between the inner cylinder wall 210 and the outer cylinder wall 220. A second stream enters the flame tube 200 from the intake cyclone separator 130, while the fuel injector 600 injects fuel, causing the fuel to burn with air to generate high-temperature gas. Meanwhile, the first and third streams can enter the flame tube 200 from the rear guide vane 320 and the cooling holes, respectively. The stream entering from the rear guide vane 320 is used to change the direction of the high-temperature gas. The streams entering from the rear guide vane 320 and the cooling holes can also regulate the temperature field at the outlet 170, so that the high-temperature gas flows into the turbine guide vane or directly into the turbine blades according to the preset flow direction.

[0049] Furthermore, the engine combustion chamber includes a diffuser 400 disposed at inlet 160. The incoming flow enters the engine combustion chamber from inlet 160, is decelerated and diffused in the diffuser 400, and then splits into three paths entering the flame tube 200. The rear guide vane can function as a main combustion port and / or a mixing port.

[0050] In some embodiments, combined Figure 1 and Figure 2 The rear diffuser 320 includes multiple diffuser tubes, which are arranged in a ring around the axial direction of the flame tube 200 on the tube wall. Each diffuser tube passes through the tube wall of the flame tube 200 and extends into the flame tube 200.

[0051] In this embodiment, multiple guide pipes are respectively provided on the inner cylinder wall 210 and the outer cylinder wall 220, arranged in a ring around the flame tube 200. The guide pipes pass through the inner cylinder wall 210 and the outer cylinder wall 220, so that the incoming flow from the first and third paths can enter the flame tube 200 under the guidance of the guide pipes, and flow into the turbine guide or directly into the turbine blades along the preset incoming flow direction with the high-temperature gas in the flame tube 200.

[0052] Furthermore, the guide pipe located on the outer cylinder wall 220 extends through the outer cylinder wall 220 into the flame tube 200, and the guide pipe located on the inner cylinder wall 210 extends through the outer cylinder wall 220 into the flame tube 200, which can further enhance the guiding effect of the guide pipe on the incoming flow.

[0053] Specifically, the length of the guide pipe located on the outer cylinder wall 220 is shorter than the length of the guide pipe located on the inner cylinder wall 210, so that the air flow rate entering from the combustion chamber ring 140 and the combustion chamber outer ring 150 per unit time is the same, and further ensures that the airflow direction of the outlet 170 flows out in the preset swirling direction.

[0054] Furthermore, combining Figure 2 The guide pipe located on the inner wall 210 of the flame tube 200 is inclined in opposite directions to the guide pipe located on the outer wall 220 of the flame tube 200. For example, on the cross-section of the flame tube 200 along the axial direction, the sum of the angle between the guide pipe located on the inner wall 210 of the flame tube 200 and the tangent of the inner wall 210 and the angle between the guide pipe located on the outer wall 220 of the flame tube 200 and the tangent of the outer wall 220 is 180 degrees.

[0055] The diameter of the guide pipe located on the inner wall 210 of the flame tube 200 and the diameter of the guide pipe located on the outer wall 220 of the flame tube 200 are both larger than the diameter of the cooling holes on the flame tube 200, so that under the action of the incoming flow entering the flame tube 200 through the guide pipe, the high-temperature gas generated by combustion flows from the outlet 170 of the engine combustion chamber into the turbine guide or directly into the turbine blades in a preset incoming flow direction.

[0056] In other embodiments, the rear diffuser 320 includes a plurality of guide vanes disposed on the cylinder wall, the plurality of guide vanes being arranged in a ring around the axial direction of the flame tube 200.

[0057] In this embodiment, an annular hole is provided on the wall of the flame tube 200, and the rear guide vane 320 includes multiple guide vane grids, which are sequentially arranged in the annular hole.

[0058] In other embodiments, the flame tube 200 is provided with both a guide pipe and a guide vane grid, which are arranged sequentially along the axial direction of the flame tube 200.

[0059] In some embodiments, the flow direction of the rear diffuser 320 is inclined to the tangential direction of the circumferential direction of the flame tube 200.

[0060] Specifically, the rear guide vane and its corresponding position are tangential in the circumferential direction of the flame tube 200. This can also be interpreted as follows: within the axial cross-section, the guiding direction of the rear guide vane 320 is inclined radially to the flame tube 200, meaning the extension of the guiding direction does not pass through the axis of the flame tube 200. This allows the incoming flow passing through the rear guide vane 320 to rotate, and simultaneously, under the impact of the second incoming flow, it can enter the turbine guide vane along the pre-rotation direction.

[0061] Furthermore, the flow direction of the rear diffuser 320 is inclined to the axial direction of the flame tube 200.

[0062] The flow direction of the rear guide vane 320 is inclined to the radial direction of the flame tube 200, while also being able to advance along the axial direction of the flame tube 200, which helps to reduce the flow resistance of the incoming flow and improve combustion efficiency.

[0063] In some embodiments, the axial direction of the intake cyclone 130 is inclined to the axial direction of the flame tube 200. Furthermore, the axes of the intake cyclone 130 and the rear guide vane 320 are both inclined to the same side relative to the axial direction of the flame tube 200, so that the fuel injected from the intake cyclone 130 is aligned with the incoming flow direction after being guided by the rear guide vane 320. This facilitates the further flow of the high-temperature combustion gases into the turbine guide vane at a preset angle or directly into the turbine blades.

[0064] In particular, the axis of the air inlet cyclone separator 130 and the axis of the rear guide vane 320 are both inclined to the same side relative to the axis of the flame tube 200. That is, the axial direction of the air inlet cyclone separator 130 and the axial direction of the rear guide vane 320 can be the same or different, as long as they are inclined to the same side.

[0065] In other embodiments, combined with Figure 3 The front deflector 310 includes a plurality of guide vanes surrounding the inlet of the engine combustion chamber, which includes a fuel injector 600 and a flame stabilizer 500. The front deflector 310, the fuel injector 600 and the flame stabilizer 500 are arranged sequentially along the direction from the inlet 160 to the outlet 170.

[0066] In this embodiment, the incoming flow enters the engine combustion chamber from the inlet 160. Under the action of the front guide vane 310, the incoming flow enters the engine combustion chamber along a preset direction. At this time, the fuel injector 600 injects fuel, which is burned in the recirculation zone after the flame stabilizer 500. The high-temperature gas generated by combustion flows into the turbine guide vane or directly into the turbine blades from the outlet 170 of the engine combustion chamber at a preset angle. After expansion and acceleration, it drives the turbine to do work. The gas from the engine combustion chamber outlet 170 enters the turbine guide vane or directly into the turbine blades along the preset direction, which greatly reduces the load on the turbine guide vane. This reduces the density and strength design of the turbine guide vane, simplifies the design of the turbine guide vane, reduces the design difficulty of the turbine guide vane, simplifies the turbine guide vane structure, and reduces the design difficulty and weight of the turbine guide vane.

[0067] The flame stabilizer can be a pneumatic flame stabilizer or a blunt body stabilizer. The pneumatic stabilizer can be a planar jet flame stabilizer or a reverse jet flame stabilizer.

[0068] In some other embodiments, unlike the embodiments described above, the guide vane is provided with multiple fuel injection ports, the fuel injector 600 is connected to the fuel injection ports, the fuel injection ports are used to inject fuel, and the guide vane is also used as a flame stabilizer or the jet ejected from the guide vane is used to form a flame stabilizer.

[0069] In some embodiments, combined with Figure 4 The engine combustion chamber is either a single-tube combustion chamber or an annular combustion chamber. The flame tube 200 is inclined to the axial direction of the engine combustion chamber, and the axial direction of the flame tube 200 is perpendicular to the radial direction of the engine combustion chamber. That is, multiple flame tubes are arranged in a ring around the axial direction of the engine combustion chamber, and each flame tube is inclined to the axial direction of the engine combustion chamber.

[0070] In this embodiment, based on the guide provided at the inlet 160 of the engine combustion chamber, the axial tilt of the flame tube 200 and the inner casing 110 further enhances the guiding effect on the incoming flow, so that the high-temperature gas generated by combustion flows into the turbine guide at a preset angle from the outlet 170 of the engine combustion chamber or directly into the turbine blades.

[0071] In some embodiments, the engine combustion chamber is the engine main combustion chamber or the engine turbine stage combustion chamber. The engine combustion chamber of this application is applicable to the fields of aero engines, gas turbines, or other industrial combustion devices.

[0072] One embodiment of this application also discloses an engine combustion chamber with an outlet flow pre-swirl. The combustion chamber includes a casing, a flame tube, and an intake swirler. The casing has a receiving cavity, with an inlet at one end and an outlet at the other. The flame tube is disposed within the receiving cavity. The intake swirler is disposed at the inlet position. (In conjunction with...) Figure 5 When the engine combustion chamber is an annular combustion chamber, the axis of the intake cyclone separator is tilted relative to the engine's axis, allowing the incoming flow to enter the turbine guide vane or directly into the turbine blades at a certain angle to the engine's axis. Similarly, when the engine combustion chamber is a single-tube or annular combustion chamber, the axis of the intake cyclone separator and the axis of the flame tube are both tilted relative to the engine's axis, allowing the incoming flow to enter the turbine guide vane or directly into the turbine blades at a certain angle to the engine's axis.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An engine combustion chamber with outlet flow pre-swirl, characterized in that, The engine combustion chamber includes: A housing, wherein the housing has a receiving cavity, one end of which has an inlet and the other end has an outlet; A flame tube is disposed within the receiving cavity; and includes an inner cylinder wall and an outer cylinder wall located around the periphery of the inner cylinder wall; The inlet is equipped with a front guide vane, and the flame tube is equipped with a rear guide vane on its wall. An air inlet cyclone is located between the inner cylinder wall and the outer cylinder wall and near the inlet end; wherein the axial direction of the air inlet cyclone is inclined to the axial direction of the flame tube; The front deflector is used to ensure that the incoming flow from the outlet flows into the turbine guide at a certain angle to the engine axis or directly into the turbine blades, and the rear deflector is used to ensure that the incoming flow from the outlet flows into the turbine guide at a certain angle to the engine axis or directly into the turbine blades.

2. The engine combustion chamber with outlet flow pre-swirl according to claim 1, characterized in that, The engine combustion chamber is an annular combustion chamber, and the casing includes an inner casing and an outer casing located around the inner casing. The receiving cavity is formed between the inner casing and the outer casing.

3. The engine combustion chamber with outlet flow pre-swirl according to claim 2, characterized in that, The rear flow guide is respectively provided on the inner cylinder wall and the outer cylinder wall; An outer combustion chamber annulus is formed between the outer casing and the outer cylinder wall, and an inner combustion chamber annulus is formed between the inner casing and the inner cylinder wall; The incoming flow from the inlet is divided into three paths: the first path enters the outer ring of the combustion chamber and enters the flame tube through the rear guide on the outer cylinder wall; the second path enters the flame tube through the intake swirl diffuser; and the third path enters the inner ring of the combustion chamber and enters the flame tube through the rear guide on the inner cylinder wall.

4. The engine combustion chamber with outlet flow pre-swirl according to claim 2, characterized in that, The rear guide tube includes multiple guide tubes, which are arranged in a ring around the axial direction of the flame tube on the tube wall, and each guide tube passes through the tube wall of the flame tube and extends into the flame tube.

5. The engine combustion chamber with outlet flow pre-swirl according to claim 2, characterized in that, The rear guide vane includes a plurality of guide vanes disposed on the cylinder wall, and the plurality of guide vanes are arranged in a ring around the axial direction of the flame tube.

6. The engine combustion chamber with outlet flow pre-swirl according to claim 2, characterized in that, The flow direction of the rear diffuser is inclined to the circumferential tangential direction of the flame tube.

7. The engine combustion chamber with outlet flow pre-swirl according to claim 6, characterized in that, The flow direction of the rear guide vane is inclined to the axial direction of the flame tube.

8. The engine combustion chamber with outlet flow pre-swirl according to claim 3, characterized in that, The axes of the air inlet cyclone separator and the rear diffuser are both inclined to the same side relative to the axis of the flame tube.

9. The engine combustion chamber with outlet flow pre-swirl according to claim 1, characterized in that, The engine combustion chamber is a single-tube combustion chamber or annular tube combustion chamber. The axial direction of the flame tube is inclined to the axial direction of the engine combustion chamber, and the axial direction of the flame tube is perpendicular to the radial direction of the engine.

10. The engine combustion chamber with outlet flow pre-swirl according to claim 1, characterized in that, When the engine combustion chamber is an annular combustion chamber, the axial direction of the intake cyclone is inclined to the axial direction of the engine; When the engine combustion chamber is a single-tube combustion chamber or annular tube combustion chamber, the axial direction of the intake cyclone is inclined to the axial direction of the engine, and the axial direction of the flame tube is inclined to the axial direction of the engine.

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