Detonation wave propagation direction induced air inlet pre-rotation structure of rotary detonation combustion chamber

Abstract

The invention relates to the technical field of aero-engines, and provides a rotary detonation combustion chamber detonation wave propagation direction induced air inlet pre-rotation structure which comprises an air inlet shell, an air inlet flow channel is formed in the air inlet shell, and the air inlet flow channel comprises an air inlet channel, a connecting channel, an expansion channel and a backflow channel. One end of the air inlet channel is used for introducing air and fuel, the other end communicates with the connecting channel, the small end of the expansion channel communicates with the end, away from the air inlet channel, of the connecting channel, and the large end of the expansion channel communicates with the combustion chamber. The inlet end of the backflow channel communicates with the end, away from the expansion channel, of the connecting channel, and the outlet end of the backflow channel communicates with the air inlet channel. A plurality of guide vanes which are arranged at intervals in the circumferential direction are arranged in the expansion channel, and a pre-swirling channel used for pre-swirling gas is formed between every two adjacent guide vanes. According to the detonation wave propagation direction induced air inlet pre-swirling structure of the rotary detonation combustion chamber, the control accuracy of the detonation wave mode in the combustion chamber can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft engines, and in particular to an intake pre-swirl structure for inducing the propagation direction of a detonation wave in a rotating detonation combustion chamber. Background Art

[0002] The rotating detonation combustor is a new type of combustion technology. Its basic principle is to use the rotating motion of the detonation wave in the combustion chamber to achieve an efficient and rapid combustion process. In the rotating detonation combustor, the fuel and oxidant are injected into a special combustion chamber with a certain shape and structure that can trigger the formation and propagation of the detonation wave. When the detonation wave rotates in the combustion chamber, it quickly mixes and ignites the fuel and oxidant, thereby releasing a large amount of energy. This technology has the advantages of fast combustion speed, high combustion efficiency and low emissions. As a new type of efficient propulsion technology, the rotating detonation combustor uses continuous detonation waves to generate thrust, so it has broad application prospects in aerospace, energy and other fields.

[0003] Reference Figure 1 In the prior art, the intake end of the rotating detonation combustion chamber 2 (hereinafter referred to as the combustion chamber 2) includes an inner annular wall 21 and an outer annular wall 22 which are coaxially sleeved. The inner annular wall 21 and the outer annular wall 22 are spaced apart to form an intake flow passage 11 for fuel and air to enter the combustion chamber 2. The intake flow passage 11 includes a straight channel 115 and an expansion channel 113 which are interconnected. The end of the straight channel 115 away from the expansion channel 113 is connected to the air intake end, and the end of the expansion channel 113 away from the straight channel 115 is connected to the combustion chamber 2, that is, a convergence-expansion intake scheme. In order to control the mode of the detonation wave, a complex combustion chamber 2 structure design or an external control system is usually adopted. Although these methods can achieve modal control to a certain extent, they increase the complexity and cost of the system, and therefore need to be further optimized. Summary of the invention

[0004] In order to improve the control accuracy of the detonation wave mode in the combustion chamber, the present application provides a structure for inducing intake pre-swirl in the propagation direction of the detonation wave in a rotating detonation combustion chamber.

[0005] The present application provides a rotating detonation combustion chamber detonation wave propagation direction inducing intake pre-swirl structure adopts the following technical solutions: A rotating detonation combustion chamber detonation wave propagation direction inducing intake pre-swirl structure, comprising an intake shell arranged at the combustion chamber entrance, an intake flow passage opened in the intake shell, the intake flow passage comprising an intake passage, a connecting passage, an expansion passage and a reflow passage, one end of the intake passage is used for introducing air and fuel, and the other end is connected to the connecting passage, the small end of the expansion passage is connected to the end of the connecting passage away from the intake passage, and the large end of the expansion passage is connected to the combustion chamber; the inlet end of the reflow passage is connected to the end of the connecting passage away from the expansion passage, and the outlet end of the reflow passage is connected to the intake passage; a plurality of guide vanes arranged at circumferential intervals are provided in the expansion passage, and a pre-swirl channel for pre-swirl gas is formed between two adjacent guide vanes.

[0006] By adopting the above-mentioned technical scheme, a pre-swirl channel is formed between two adjacent guide vanes through the arrangement of the intake housing, the intake flow channel and the guide vanes, and a plurality of guide vanes are arranged circumferentially to form a plurality of pre-swirl channels for pre-swirl the gas; the gas (air and fuel) is sequentially introduced into the combustion chamber through the intake flow channel and the pre-swirl channel, and the gas will rotate after being guided by the guide vanes, that is, the explosive mixture formed by the combination of air and fuel is pre-swirl, so that the explosive mixture rotates into the combustion chamber, and the rotation of the gas into the combustion chamber helps to form an orderly airflow structure, improves the mixing effect of the fuel and the air, and makes the detonation wave propagate in the combustion chamber in a more stable manner, which is beneficial to the modal control of the detonation wave.

[0007] The intake channel, connecting channel, expansion channel and reflux channel are combined to form a "Tesla valve" structure. The one-way flow characteristic of the Tesla valve is used to separate the forward channel for gas entering the combustion chamber from the reverse channel for pressure return and combustion product return, effectively reducing the resistance of pressure return and combustion product return to the forward-entering gas, so that the detonation boost can make up for the total pressure loss caused by the upper intake, thereby increasing the total pressure gain of the rotating detonation combustion chamber; in addition, a plurality of guide vanes are arranged in the expansion channel and are arranged at circumferential intervals, which have a certain resistance effect on pressure return and combustion product return, thereby reducing the total pressure loss of the combustion chamber.

[0008] Optionally, the reflux channel includes a straight section and an arc section, and the straight section and the connecting channel, as well as the expansion channel and the connecting channel are all connected in a straight line. One end of the arc section is connected to one end of the straight section away from the connecting channel, and the other end is connected to the air intake channel. The angle between the air intake channel and the straight section is an acute angle.

[0009] By adopting the above-mentioned technical scheme, in the process of gas entering the combustion chamber forwardly, the gas enters the combustion chamber through the intake channel, the connecting channel and the expansion channel in sequence. When the pressure wave and / or combustion product generated in the combustion chamber is returned, the pressure wave and / or combustion product passes through the expansion channel, the connecting channel, the straight section and the arc section in sequence. The straight section and the arc section constitute an arc-shaped reflow channel. The pressure wave and / or combustion product are returned through the arc-shaped reflow channel, and the returned pressure wave and / or combustion product are weakened by the arc-shaped reflow channel. Since the pressure wave and combustion product return channel and the air and fuel forward entry channel are two channels, the pressure wave and / or combustion product return has little effect on the forward entry of air and fuel, thereby reducing the total intake pressure loss and improving the total pressure gain of the rotating detonation combustion chamber.

[0010] Optionally, the side wall of the air intake housing close to the combustion chamber is provided with a coaxially arranged inner cylinder and an outer cylinder, the outer circumferential wall of the inner cylinder and the inner circumferential wall of the outer cylinder are spaced apart to form a connecting channel, one end of the connecting channel is connected to the large end of the expansion channel, and the other end is connected to the combustion chamber, and the expansion channel is connected to the combustion chamber through the connecting channel; an adjusting mechanism for adjusting the gas pre-swirl angle is provided in the connecting channel.

[0011] By adopting the above-mentioned technical scheme, through the setting of the adjustment mechanism, the gas pre-swirl angle can be adjusted by the adjustment mechanism according to the structural shape of the combustion chamber, that is, by controlling the gas pre-swirl angle, the entry direction of the gas into the combustion chamber can be controlled, and the mixing effect of the fuel and air can be improved. By controlling the rotation direction of the airflow, it works in coordination with the geometric shape of the combustion chamber to help form a stable detonation wave mode, so as to accurately control the detonation wave mode in the combustion chamber.

[0012] Optionally, the adjustment mechanism includes an adjustment plate and an adjustment assembly, wherein the adjustment plate is arranged in the connecting channel and is arranged in plurality at circumferential intervals around the inner cylinder, the plurality of adjustment plates are arranged corresponding to the plurality of guide vanes, one side of each of the adjustment plates is hinged to a side of the corresponding guide vane close to the connecting channel, and an adjustment channel is formed between two adjacent adjustment plates; the adjustment assembly is arranged in the outer cylinder to drive the free ends of all the adjustment plates to flip synchronously.

[0013] By adopting the above-mentioned technical scheme, through the arrangement of the adjustment sheet and the adjustment component, two adjacent adjustment sheets are combined to form an adjustment channel, and multiple adjustment sheets are combined to form multiple adjustment channels, and the multiple adjustment channels are arranged corresponding to the multiple pre-rotation channels; the free ends of all the adjustment sheets are driven to flip synchronously through the adjustment component, so that the inclination angle of the adjustment sheet can be changed, so that a certain angle is formed between the pre-rotation channel and the adjustment channel, and then the pre-rotation angle of the gas is changed when the gas passes through the pre-rotation channel and the adjustment channel in sequence.

[0014] Optionally, a rotating shaft is provided at one end of the adjusting piece, the rotating shaft is rotatably connected to the guide vane, and one side of the adjusting piece is hinged to the corresponding guide vane through the rotating shaft; a rotating groove is provided on the end face of the outer cylinder close to the combustion chamber, and an adjusting rod is provided on the free side of each adjusting piece, and one end of the adjusting rod is inserted into the rotating groove; the adjusting assembly includes an adjusting ring, a rotating part and a limiting part, the adjusting ring is rotatably installed in the rotating groove, and when the adjustment ring rotates around its own central axis, the adjusting ring drives all the adjusting pieces to flip synchronously through the adjusting rod; the rotating part is detachably arranged on the outer cylinder to drive the adjusting ring to rotate, and the limiting part is arranged on the outer cylinder to limit the free rotation of the adjusting ring.

[0015] By adopting the above-mentioned technical scheme, through the setting of the adjusting ring, the rotating part and the limiting part, the free end of each adjusting piece is inserted into the rotating groove through the adjusting rod and connected with the adjusting ring. When adjusting the gas pre-swirl angle, the adjusting ring is driven to rotate by the rotating part, and the adjusting ring can drive the free ends of all adjusting pieces to rotate around their corresponding rotating axes, thereby changing the direction of the adjusting channel to adjust the pre-swirl angle of the gas; after the adjustment is completed, the adjusting ring is limited by the limiting part to limit the free rotation of the adjusting ring to maintain the position of the adjusting piece, so that the gas can cut into the combustion chamber through a specific pre-swirl angle.

[0016] Optionally, the inner wall of the outer cylinder is provided with a plurality of first through-grooves connected to the rotating groove, and the plurality of first through-grooves are arranged corresponding to the plurality of adjusting plates, and each of the first through-grooves is arranged in an arc shape around the central axis of the rotating shaft, so as to allow an adjusting rod corresponding to the adjusting plate to extend into the rotating groove; the adjusting ring is provided with a plurality of second through-grooves, and the plurality of second through-grooves are arranged corresponding to the plurality of adjusting plates, and both ends of each of the second through-grooves are extended along the axial direction of the outer cylinder, so as to allow an adjusting rod corresponding to the adjusting plate to be inserted, and when the adjusting ring rotates around its own central axis, the adjusting ring pushes the adjusting rod through the inner wall of the second through-grooves, so as to force the adjusting rod to move along the arc of the first through-grooves.

[0017] By adopting the above-mentioned technical scheme, through the arrangement of the first through-groove and the second through-groove, the first through-groove is arranged in an arc shape, so that the free end of the adjusting plate can rotate around the central axis of the rotating shaft; one end of the adjusting rod of the adjusting plate is inserted into the second through-groove, so that the adjusting rod and the adjusting ring are connected, and when the adjusting ring rotates, the adjusting ring can push the adjusting rod through the inner wall of the second through-groove, forcing the adjusting rod to rotate around the central axis of the rotating shaft, thereby improving the convenience of adjusting the gas pre-rotation angle.

[0018] Optionally, the rotating member includes a mounting seat, a docking plate and a rotating plate, the docking plate and the rotating plate are respectively rotatably mounted on the two ends of the mounting seat, the side wall of the docking plate away from the mounting seat is provided with a docking rod, and the side wall of the adjusting ring is provided with a docking hole for the docking rod to be inserted; the side wall of the mounting seat close to the docking plate is provided with a mounting groove, the rotating plate is coaxially connected with the rotating rod, one end of the rotating rod away from the rotating plate extends into the mounting groove and is coaxially connected with a rotating gear, the side wall of the docking plate close to the mounting groove is coaxially connected with a rotating gear ring, and the rotating gear and the rotating gear ring are meshed for transmission.

[0019] By adopting the above-mentioned technical scheme, through the setting of the mounting seat, the docking plate and the rotating plate, when the gas pre-swirl angle is adjusted, the intake housing is removed from the combustion chamber, and then the docking rod of the docking plate is inserted into the docking hole, so that the docking plate and the adjustment ring are connected through the docking rod, and then the rotating plate is rotated. The docking plate can drive the adjustment ring to rotate under the action of the rotating gear and the rotating ring gear, thereby driving the free ends of all the adjustment plates to flip synchronously, thereby improving the convenience of adjusting the direction of the adjustment channel.

[0020] Optionally, a plurality of transition tooth groups are provided in the installation groove, and the plurality of transition tooth groups are arranged at intervals around the central axis of the rotating rod; each group of the transition tooth groups includes a plurality of transition gears rotatably installed on the inner wall of the installation groove, and the diameters of the plurality of transition gears gradually increase from the side close to the center position of the installation groove to the side away from the center position of the installation groove, and two adjacent transition gears are meshed for transmission; the rotating gear is meshed for transmission with the transition gear with the smallest diameter, and the rotating gear ring is meshed for transmission with the transition gear with the largest diameter, and the rotating gear and the rotating gear ring are meshed for transmission through a plurality of transition tooth groups.

[0021] By adopting the above technical solution and setting a plurality of transition gears, when the rotating plate rotates, the docking plate can be driven to rotate; the diameters of the plurality of transition gears gradually increase from the side close to the center position of the mounting groove to the side away from the center position of the mounting groove, so that when the rotating plate is controlled to rotate a certain angle, the rotation angle of the docking plate is much lower than the rotation angle of the rotating plate, so that the flip angle of the adjustment plate can be fine-tuned, thereby improving the accuracy of the gas pre-swirl angle adjustment.

[0022] Optionally, the limit member includes a limit rod and a limit spring, the limit rod is slidably installed in the rotating groove, the limit spring is installed between the limit rod and the inner wall of the rotating groove, and the limit spring normally forces the limit rod to be inserted into the docking hole of the adjusting ring to limit the free rotation of the adjusting ring; the docking holes are arranged in multiple around the central axis of the adjusting ring, and when the docking rod of the docking plate is inserted into the docking hole, the docking rod forces the limit rod to disengage from the docking hole.

[0023] By adopting the above-mentioned technical scheme, through the setting of the limit rod and the limit spring, the limit rod is inserted into the docking hole of the adjustment ring under the action of the limit spring, thereby limiting the free rotation of the adjustment ring, that is, fixing the flipping angle of the adjustment plate; when it is necessary to adjust the pre-rotation angle of the gas, the docking rod of the docking plate is inserted into the docking hole of the adjustment ring, and the docking rod can squeeze the limit rod out of the docking hole, thereby releasing the limiting effect on the adjustment ring. At this time, the adjustment ring can be rotated to adjust the flipping angle of the adjustment plate, thereby improving the operational convenience of the overall structure.

[0024] Optionally, a rotating channel is provided on the surface of the adjusting plate, and two adjacent adjusting channels are connected to each other through the rotating channel, and both ends of the rotating channel are respectively facing the outlet ends of the two adjacent adjusting channels; the adjusting plate is provided with an opening and closing part for opening and closing the rotating channel, and when the gas flows from the inlet end of the adjusting channel to the outlet end of the adjusting channel, the opening and closing part closes the rotating channel, and when the pressure of the combustion chamber and the combustion products are returned, the opening and closing part opens the rotating channel.

[0025] By adopting the above technical solution and setting the rotary channel, when the pressure wave and / or combustion product generated in the combustion chamber is transmitted back, the opening and closing member opens the rotary channel, and after the transmitted pressure wave and / or combustion product enters the regulating channel, part of the pressure wave and / or combustion product enters the adjacent regulating channel through the rotary channel, and collides with the pressure wave and / or combustion product in the adjacent regulating channel, thereby weakening the pressure wave and / or combustion product in the adjacent regulating channel, forming a first-level weakening. After the pressure wave and / or combustion product is transmitted back to the intake flow channel, the intake flow channel of the "Tesla valve" structure forms a second-level weakening of the transmitted pressure wave and / or combustion product, so that the pressure wave and / or combustion product transmission back has little effect on the forward entry of air and fuel, thereby reducing the total intake pressure loss and improving the total pressure gain of the rotating detonation combustion chamber.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the arrangement of the intake housing, intake flow channel and guide vanes, a pre-swirl channel is formed between two adjacent guide vanes, and a plurality of guide vanes are arranged circumferentially to form a plurality of pre-swirl channels for pre-swirl the gas; the gas (air and fuel) is sequentially introduced into the combustion chamber through the intake flow channel and the pre-swirl channel, and the gas will rotate after being guided by the guide vanes, that is, the explosive mixture formed by the combination of air and fuel is pre-swirl, so that the explosive mixture rotates into the combustion chamber, and the rotation of the gas into the combustion chamber helps to form an orderly airflow structure, improve the mixing effect of fuel and air, and make the detonation wave propagate in the combustion chamber in a more stable manner, which is beneficial to the mode of the detonation wave Control; the intake channel, connecting channel, expansion channel and reflux channel are combined to form a "Tesla valve" structure, which utilizes the one-way flow characteristics of the Tesla valve to separate the forward channel for gas entering the combustion chamber from the reverse channel for pressure return and combustion product return, effectively reducing the resistance of pressure return and combustion product return to the forward-entering gas, so that the detonation boost can make up for the total pressure loss caused by the upper intake, thereby increasing the total pressure gain of the rotating detonation combustion chamber; in addition, a plurality of guide vanes are arranged in the expansion channel and are arranged at circumferential intervals, which have a certain resistance effect on pressure return and combustion product return, thereby reducing the total pressure loss of the combustion chamber.

[0027] 2. Through the arrangement of the adjusting ring, the rotating member and the limiting member, the free end of each adjusting piece is inserted into the rotating groove through the adjusting rod to dock with the adjusting ring. When adjusting the gas pre-swirl angle, the adjusting ring is driven to rotate by the rotating member, and the adjusting ring can drive the free ends of all the adjusting pieces to rotate around their corresponding rotating axes, thereby changing the direction of the adjusting channel to adjust the gas pre-swirl angle; after the adjustment is completed, the adjusting ring is limited by the limiting member to limit the free rotation of the adjusting ring to maintain the position of the adjusting piece, so that the gas can cut into the combustion chamber at a specific pre-swirl angle; 3. Through the setting of the rotary channel, when the pressure wave and / or combustion product generated in the combustion chamber is transmitted back, the opening and closing part opens the rotary channel at this time. After the transmitted pressure wave and / or combustion product enters the regulating channel, part of the pressure wave and / or combustion product enters the adjacent regulating channel through the rotary channel, and collides with the pressure wave and / or combustion product in the adjacent regulating channel, thereby weakening the pressure wave and / or combustion product in the adjacent regulating channel, forming a first-level weakening. After the pressure wave and / or combustion product is transmitted back to the intake flow channel, the intake flow channel of the "Tesla valve" structure forms a second-level weakening of the returned pressure wave and / or combustion product, so that the pressure wave and / or combustion product transmission has little effect on the forward entry of air and fuel, thereby reducing the total intake pressure loss and improving the total pressure gain of the rotating detonation combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a partial cross-sectional view of an intake air passage in the background technology; Figure 2is a cross-sectional view of the overall structure of Example 1; Figure 3 is a schematic diagram of the structure of the guide vane embodied in Example 1; Figure 4 is a schematic diagram of the structure of the regulating mechanism of Example 2; Figure 5 is a schematic diagram of the structure of the regulating sheet embodied in Example 2; Figure 6 is a schematic structural diagram of the first cutting surface and the second cutting surface according to Embodiment 2; Figure 7 is a schematic diagram of the structure of the regulating channel embodied in Example 2; Figure 8 is a schematic structural diagram of a second penetration groove in Embodiment 2; Fig. 9 is an exploded schematic diagram of a transition tooth set embodying embodiment 2; Fig.10 is a schematic structural diagram of a transition gear according to Embodiment 2; Fig.11 is a partial cross-sectional view of a stopper according to Embodiment 2; Fig.12 It is a partial cross-sectional view of the rotary channel of Example 3.

[0029] Explanation of reference numerals: 1. air intake housing; 11. air intake channel; 111. air intake channel; 112. connecting channel; 113. expansion channel; 114. return channel; 1141. straight section; 1142. arc section; 115. straight channel; 12. guide vane; 121. pre-swirl channel; 13. inner cylinder; 131. second cutting surface; 14. outer cylinder; 141. rotating groove; 142. first penetration groove; 143. first cutting surface; 15. connecting channel; 151. installation area; 16. first main body; 17. second main body; 18. guide part; 2. combustion chamber; 21. inner ring wall; 22. outer ring wall; 3. adjustment Mechanism; 31. adjusting plate; 311. adjusting channel; 312. rotating shaft; 313. adjusting rod; 314. rotating channel; 315. meeting surface; 316. flip groove; 317. flip plate; 32. adjusting ring; 321. second penetration groove; 3211. pushing surface; 3212. limiting surface; 322. docking hole; 33. mounting seat; 331. mounting groove; 34. docking plate; 341. docking rod; 342. rotating gear ring; 343. docking ring; 35. rotating plate; 351. rotating rod; 352. rotating gear; 36. limiting rod; 37. limiting spring; 4. transition tooth group; 41. transition gear. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1 -Attached Fig.12 This application is described in further detail.

[0031] Reference Figure 1 The intake end of the rotating detonation combustion chamber 2 (hereinafter referred to as the combustion chamber 2) in the related art includes an inner annular wall 21 and an outer annular wall 22 which are coaxially sleeved. The inner annular wall 21 and the outer annular wall 22 are spaced apart to form an intake flow passage 11 for fuel and air to enter the combustion chamber 2. The intake flow passage 11 includes a straight channel 115 and an expansion channel 113 which are interconnected. One end of the straight channel 115 away from the expansion channel 113 is connected to the air intake end, and one end of the expansion channel 113 away from the straight channel 115 is connected to the combustion chamber 2, that is, a convergent-divergent intake scheme.

[0032] The detonation wave is a shock wave that causes the chemical reaction zone to rotate at high speed around the combustion chamber 2. The pressure at the location of the detonation wave is very high. Every time the detonation wave turns to a position, pressure feedback will occur, and the pressure feedback will cause the intake end of the combustion chamber 2 to be blocked. After the intake is blocked, the pressure decays relatively slowly, resulting in a longer intake recovery time. When the detonation wave turns back to its original position again, fresh air and the fuel required for the reaction have not had time to be replenished into the combustion chamber 2, causing the detonation wave to be extinguished.

[0033] The convergent-divergent intake scheme is essentially a supersonic intake scheme. A positive shock wave will be formed in the expansion channel 113. This positive shock wave can block the pressure feedback of the detonation wave. The Mach number of the supersonic intake is very high, and fresh air and fuel required for the reaction can be quickly replenished, solving the problem of slow intake recovery time. In order to control the mode of the detonation wave, a complex combustion chamber 2 structure design or an external control system is usually used. Although these methods can achieve mode control to a certain extent, they increase the complexity and cost of the system.

[0034] Embodiment 1: The embodiment of the present application discloses a structure for inducing intake pre-swirl in the propagation direction of detonation waves in a rotating detonation combustion chamber.

[0035] Reference Figure 2 A rotating detonation combustion chamber detonation wave propagation direction inducing intake pre-swirl structure, comprising an intake housing 1 installed at the inlet of a combustion chamber 2, the intake housing 1 and the outer wall of the combustion chamber 2 can be connected and fixed by a snap-fit ​​assembly, or can be connected and fixed by a bolt connection; an intake flow channel 11 is opened in the intake housing 1, the inlet end of the intake flow channel 11 is used to pass gas (air and fuel), and the outlet end of the intake flow channel 11 is connected to the interior of the combustion chamber 2.

[0036] Reference Figure 2The intake channel 11 includes an intake channel 111, a connecting channel 112, an expansion channel 113 and a return channel 114. The intake channel 111 is the inlet end of the intake channel 11, that is, one end of the intake channel 111 is used to introduce air and fuel, and the other end of the intake channel 111 is connected to the connecting channel 112; the small end of the expansion channel 113 is connected to the end of the connecting channel 112 away from the intake channel 111, and the large end of the expansion channel 113 is connected to the combustion chamber 2; the return channel 114 includes a straight section 1141 and an arc section 1142. The straight section 1141 and the connecting channel 112, and the expansion channel 113 and the connecting channel 112 are all connected in a straight line. One end of the arc section 1142 is connected to the end of the straight section 1141 away from the connecting channel 112, and the other end is connected to the intake channel 111. The angle between the intake channel 111 and the straight section 1141 is 30°-45°.

[0037] Such a design utilizes the one-way flow characteristic of the "Tesla valve" to separate the forward channel for air and fuel to enter the combustion chamber 2 from the reverse channel for pressure return and combustion product return, effectively reducing the obstacles of pressure return and combustion product return to the forward-entering air and fuel, so that the detonation boost can make up for the total pressure loss caused by the upper intake, thereby increasing the total pressure gain of the combustion chamber 2; at the same time, it avoids the high temperature of the combustion product return from igniting the reactants in advance, thereby reducing the impact of the combustion product return on the combustion chamber 2.

[0038] Reference Figure 2 In this embodiment, the air intake passage 111 and the return passage 114 separate the air intake housing 1 into a first main body portion 16, a second main body portion 17 and a guide portion 18. The guide portion 18 is located between the air intake passage 111 and the return passage 114. A first connecting column (not shown in the figure) located in the air intake passage 111 is installed between the first main body portion 16 and the guide portion 18. The two ends of the first connecting column are respectively fixed to the first main body portion 16 and the guide portion 18. A second connecting column (not shown in the figure) located in the return passage 114 is installed between the second main body portion 17 and the guide portion 18. The two ends of the second connecting column are respectively fixed to the second main body portion 17 and the guide portion 18. In this design, the first connecting column and the second connecting column are arranged so that the first main body portion 16, the second main body portion 17 and the guide portion 18 are connected as a whole.

[0039] Reference Figure 2 , Figure 3 In this embodiment, a plurality of guide vanes 12 are installed in the expansion channel 113, and the plurality of guide vanes 12 are arranged at intervals in the circumferential direction around the central axis of the intake casing 1, and a side of each guide vane 12 away from the combustion chamber 2 extends into the connecting channel 112; a pre-swirl channel 121 for pre-swirling the gas is formed between two adjacent guide vanes 12, and the plurality of guide vanes 12 separate the expansion channel 113 into a plurality of pre-swirl channels 121.

[0040] The implementation principle of Example 1 of the present application is as follows: a plurality of guide vanes 12 are arranged circumferentially to form a plurality of pre-swirl channels 121 for pre-swirl the gas; the gas is sequentially introduced into the combustion chamber 2 from the inlet flow channel 11 and the pre-swirl channel 121, and the gas will rotate after being guided by the guide vanes 12, i.e., the explosive mixture formed by the combination of air and fuel is pre-swirl, so that the explosive mixture rotates into the combustion chamber 2. The rotation of the gas into the combustion chamber 2 helps to form an orderly airflow structure, improves the mixing effect of the fuel and air, and makes the detonation wave propagate in the combustion chamber 2 in a more stable manner, which is beneficial to the modal control of the detonation wave.

[0041] In the process of gas entering the combustion chamber 2 in the forward direction, the gas passes through the intake channel 111, the connecting channel 112 and the expansion channel 113 in sequence to enter the combustion chamber 2. When the pressure wave and / or combustion product generated in the combustion chamber 2 is returned, the pressure wave and / or combustion product passes through the expansion channel 113, the connecting channel 112, the straight section 1141 and the arc section 1142 in sequence. The straight section 1141 and the arc section 1142 constitute an arc-shaped reflow channel 114. The pressure wave and / or combustion product are returned through the arc-shaped reflow channel 114, and the returned pressure wave and / or combustion product are weakened by the arc-shaped reflow channel 114. Since the pressure wave and combustion product return channel and the air and fuel forward entry channel are two channels, the return of the pressure wave and / or combustion product has little effect on the forward entry of air and fuel. In addition, multiple guide vanes 12 are arranged in the expansion channel 113 and are arranged at circumferential intervals, which form a certain obstruction effect on pressure feedback and combustion product feedback. The combination of the guide vanes 12 and the intake flow channel 11 can reduce the total intake pressure loss and increase the total pressure gain of the rotating detonation combustion chamber 2.

[0042] Embodiment 2: The embodiment of the present application discloses a structure for inducing intake pre-swirl in the propagation direction of detonation waves in a rotating detonation combustion chamber.

[0043] Reference Figure 4 , Figure 5 The difference between the structure for inducing intake pre-swirl in the detonation wave propagation direction of a rotating detonation combustion chamber disclosed in the embodiment of the present application and the embodiment 1 is that: In this embodiment, an inner cylinder 13 and an outer cylinder 14 are respectively installed on the side walls of the intake housing 1 close to the combustion chamber 2. The inner cylinder 13 and the outer cylinder 14 are coaxially arranged, and the outer cylinder 14 is sleeved on the outer peripheral side of the inner cylinder 13. The outer peripheral wall of the inner cylinder 13 and the inner peripheral wall of the outer cylinder 14 are spaced apart to form a connecting channel 15. One end of the connecting channel 15 is connected to the large end of the expansion channel 113, and the other end is connected to the combustion chamber 2. The expansion channel 113 is connected to the combustion chamber 2 through the connecting channel 15.

[0044] Reference Figure 5 , Figure 6In this embodiment, the inner circumferential wall of the outer cylinder 14 is provided with a plurality of first cutting surfaces 143, and the plurality of first cutting surfaces 143 are arranged circumferentially around the central axis of the outer cylinder 14; the outer circumferential wall of the inner cylinder 13 is provided with a plurality of second cutting surfaces 131, and the plurality of second cutting surfaces 131 are arranged circumferentially around the central axis of the inner cylinder 13; the plurality of first cutting surfaces 143 and the plurality of second cutting surfaces 131 are arranged one by one; an installation area 151 is formed between the first cutting surface 143 and the corresponding second cutting surface 131; the plurality of first cutting surfaces 143 and the plurality of second cutting surfaces 131 enable the connecting channel 15 to form a plurality of installation areas 151, and the plurality of installation areas 151 are arranged corresponding to the plurality of guide vanes 12.

[0045] Reference Figure 5 , Figure 6 , Figure 7 An adjusting mechanism 3 for adjusting the gas pre-swirl angle is installed in the connecting channel 15, and the adjusting mechanism 3 includes an adjusting piece 31 and an adjusting assembly. The number of the adjusting pieces 31 is set corresponding to the number of the installation areas 151 (that is, the number of the adjusting pieces 31 is set corresponding to the number of the guide vanes 12), and each adjusting piece 31 is installed in the corresponding installation area 151. A rotating shaft 312 is installed on one side of each adjusting piece 31, and the rotating shaft 312 is rotatably connected to the corresponding guide vane 12. One side of the adjusting piece 31 is hinged to the side of the corresponding guide vane 12 close to the connecting channel 15 through the rotating shaft 312, and an adjusting channel 311 is formed between two adjacent adjusting pieces 31.

[0046] Reference Figure 6 , Figure 7 A rotation groove 141 is provided on the end surface of the outer cylinder 14 close to the combustion chamber 2, and the rotation groove 141 is arranged in a ring shape around the central axis of the outer cylinder 14. For the convenience of description, the side of the adjusting plate 31 away from the rotating shaft 312 is defined as the free side of the adjusting plate 31. An adjusting rod 313 is fixed to the free side of the adjusting plate 31, and the axial direction of the adjusting rod 313 is arranged parallel to the axial direction of the rotating shaft 312; each first cutting surface 143 of the outer cylinder 14 is provided with a first through groove 142 connected to the rotation groove 141, and the first through groove 142 is arranged in an arc shape around the central axis of the corresponding rotating shaft 312, so as to allow the adjusting rod 313 of the corresponding adjusting plate 31 to extend into the rotation groove 141.

[0047] Reference Figure 4 , Figure 7 , Figure 8The adjusting assembly is arranged on the outer cylinder 14 to drive the free ends of all the adjusting pieces 31 to turn over synchronously. The adjusting assembly includes an adjusting ring 32, a rotating member and a limiting member. The adjusting ring 32 is annular in structure. The adjusting ring 32 is rotatably installed in the rotating groove 141 so as to be able to turn around its own central axis. A plurality of second penetration grooves 321 are provided on the outer peripheral wall of the adjusting ring 32. The plurality of second penetration grooves 321 all penetrate the inner peripheral wall of the adjusting ring 32. The plurality of second penetration grooves 321 are arranged corresponding to the plurality of adjusting pieces 31. Both ends of each second penetration groove 321 are extended along the axial direction of the outer cylinder 14 to allow the adjusting rod 313 of the corresponding adjusting piece 31 to be inserted. When the adjusting ring 32 rotates around its own central axis, the adjusting ring 32 pushes the adjusting rod 313 through the inner wall of the second penetration groove 321 to force the adjusting rod 313 to move along the arc of the first penetration groove 142, thereby driving all the adjusting pieces 31 to turn over synchronously.

[0048] Reference Figure 7 , Figure 8 It should be noted that the two opposite inner walls in the width direction of the second penetration groove 321 respectively form a pushing surface 3211 and a limiting surface 3212, and the pushing surface 3211 is used to push the adjustment rod 313 to move, that is, when the adjustment ring 32 rotates, the adjustment rod 313 is pushed by the pushing surface 3211 to drive the free end of the adjustment sheet 31 to flip, thereby adjusting the direction of the adjustment channel 311. The limiting surface 3212 is used to limit the maximum displacement range of the adjusting rod 313, and the distance between the pushing surface 3211 and the limiting surface 3212 is greater than the outer diameter of the adjusting rod 313; with such a design, during the intake stage, the gas acts on the adjusting plate 31, so that the peripheral wall of the adjusting rod 313 can abut against the pushing surface 3211. At this time, the direction of the adjusting channel 311 remains constant under the action of the pushing surface 3211. When the pressure wave and / or combustion product generated in the combustion chamber 2 is transmitted back, the pressure wave and / or combustion product generated in the combustion chamber 2 has a pushing effect on the adjusting plate 31, which can drive the free end of the adjusting plate 31 to swing, forcing the adjusting rod 313 to move to the limiting surface 3212, thereby increasing the head-on contact area of ​​the adjusting plate 31 with the pressure wave and / or combustion product, and improving the blocking effect on the return of the pressure wave and / or combustion product.

[0049] Reference Figure 4 , Fig. 9The rotating member is detachably arranged on the outer cylinder 14 to drive the adjusting ring 32 to rotate. The rotating member includes a mounting seat 33, a docking plate 34 and a rotating plate 35. The docking plate 34 and the rotating plate 35 are rotatably mounted on the two ends of the mounting seat 33 respectively, and the docking plate 34 and the rotating plate 35 are coaxially arranged; a plurality of docking rods 341 are fixedly installed on the side wall of the docking plate 34 away from the mounting seat 33, and the plurality of docking rods 341 are arranged at intervals around the central axis of the docking plate 34, and a plurality of docking holes 322 are opened on the side wall of the adjusting ring 32, and the plurality of docking holes 322 are arranged at intervals around the central axis of the adjusting ring 32, and the docking holes 322 are used for matching and inserting the docking rods 341. When the docking rods 341 are inserted into the docking holes 322, the docking plate 34 can drive the adjusting ring 32 to rotate.

[0050] Reference Fig. 9 , Fig.10 A mounting groove 331 is provided on the side wall of the mounting seat 33 near the docking plate 34, and a rotating rod 351 is fixedly installed on the side wall of the rotating plate 35 near the mounting seat 33. One end of the rotating rod 351 is coaxially fixed to the rotating plate 35, and the other end extends into the mounting groove 331 and is coaxially connected with a rotating gear 352; a docking ring 343 is coaxially fixed on the side wall of the docking plate 34 near the mounting groove 331, and the docking ring 343 is inserted into the mounting groove 331, and a rotating gear ring 342 is coaxially fixed on the inner circumferential wall of the docking ring 343.

[0051] The central axis of the rotating rod 351 is located at the center position of the installation groove 331, and multiple groups of transition tooth groups 4 are arranged in the installation groove 331, and the multiple groups of transition tooth groups 4 are arranged at intervals around the central axis of the rotating rod 351; each group of transition tooth groups 4 includes multiple transition gears 41 rotatably installed on the inner wall of the installation groove 331, and the diameters of the multiple transition gears 41 gradually increase from the side close to the center position of the installation groove 331 to the side away from the center position of the installation groove 331. The adjacent two transition gears 41 are meshed and transmitted, the rotating gear 352 is meshed and transmitted with the transition gear 41 with the smallest diameter, the rotating gear ring 342 is meshed and transmitted with the transition gear 41 with the largest diameter, and the rotating gear 352 and the rotating gear ring 342 are meshed and transmitted through the multiple groups of transition tooth groups 4.

[0052] Reference Figure 4 , Fig.11, a limit piece is arranged on the outer cylinder 14 to limit the free rotation of the adjusting ring 32. The limit pieces are provided in multiple groups and are arranged at intervals around the central axis of the outer cylinder 14. The multiple groups of limit pieces are arranged corresponding to the multiple docking rods 341; in this embodiment, the limit piece includes a limit rod 36 and a limit spring 37. The limit rod 36 is slidably installed in the rotation groove 141. One end of the limit spring 37 is fixedly connected to the limit rod 36, and the other end is fixedly connected to the inner wall of the rotation groove 141. The limit spring 37 normally forces the limit rod 36 to be inserted into the docking hole 322 of the adjusting ring 32 to limit the free rotation of the adjusting ring 32. When the docking rod 341 of the docking plate 34 is inserted into the docking hole 322, the docking rod 341 pushes the limit rod 36 out of the docking hole 322.

[0053] The implementation principle of Example 2 of the present application is: according to the structural shape of the combustion chamber 2, the gas pre-rotation angle is adjusted by the adjustment mechanism 3, that is, by controlling the gas pre-rotation angle, the entry direction of the gas into the combustion chamber 2 can be controlled, thereby improving the mixing effect of the fuel and air. By controlling the rotation direction of the airflow, it cooperates with the geometric shape of the combustion chamber 2 to help form a stable detonation wave mode, thereby accurately controlling the detonation wave mode in the combustion chamber 2.

[0054] When adjusting the pre-swirl angle of the gas, the intake housing 1 is separated from the combustion chamber 2, and then the docking rod 341 of the docking plate 34 is inserted into the docking hole 322 of the adjustment ring 32, and the docking rod 341 can squeeze the limiting rod 36 out of the docking hole 322, thereby releasing the limiting effect on the adjustment ring 32; at this time, rotating the rotating plate 35 can drive the adjustment ring 32 to rotate, and the diameter of the multiple transition gears 41 gradually increases from the side close to the center position of the mounting groove 331 to the side away from the center position of the mounting groove 331, so that when the rotating plate 35 is controlled to rotate a certain angle, the rotation angle of the docking plate 34 is much lower than the rotation angle of the rotating plate 35, so that the flipping angle of the adjustment plate 31 can be fine-tuned to improve the accuracy of the gas pre-swirl angle adjustment.

[0055] After the pre-rotation angle of the gas is adjusted, the docking rod 341 is pulled out of the adjustment ring 32, and the limit rod 36 can be inserted into the docking hole 322 under the action of the limit spring 37 to limit the free rotation of the adjustment ring 32 and improve the operational convenience of the overall structure.

[0056] The limiting surface 3212 of the second penetration groove 321 is used to limit the maximum displacement range of the adjustment rod 313. The distance between the pushing surface 3211 and the limiting surface 3212 is greater than the outer diameter of the adjustment rod 313, so that during the intake stage, the gas acts on the adjustment plate 31, so that the peripheral wall of the adjustment rod 313 can abut against the pushing surface 3211, and the direction of the adjustment channel 311 is kept constant under the action of the pushing surface 3211. When the pressure wave and / or combustion product generated in the combustion chamber 2 is transmitted back, the pressure wave and / or combustion product generated in the combustion chamber 2 has a pushing effect on the adjustment plate 31, which can drive the free end of the adjustment plate 31 to swing slightly, forcing the adjustment rod 313 to move and abut against the limiting surface 3212, thereby increasing the frontal contact area of ​​the adjustment plate 31 with the pressure wave and / or combustion product, and improving the blocking effect of the pressure wave and / or combustion product back transmission.

[0057] Embodiment 3: The embodiment of the present application discloses a structure for inducing intake pre-swirl in the propagation direction of detonation waves in a rotating detonation combustion chamber.

[0058] Reference Fig.12 The difference between the structure for inducing intake pre-swirl in the detonation wave propagation direction of a rotating detonation combustion chamber disclosed in the embodiment of the present application and the embodiment 2 is that: In this embodiment, a rotation channel 314 is opened on the surface of each adjustment plate 31, and two adjacent adjustment channels 311 are connected to each other through the rotation channel 314. The rotation channel 314 is "V" shaped, and the two ends of the rotation channel 314 are respectively facing the outlet ends of the two adjacent adjustment channels 311.

[0059] The regulating plate 31 is provided with an opening and closing member for opening and closing the rotary channel 314. When the gas flows from the inlet end of the regulating channel 311 to the outlet end of the regulating channel 311, the opening and closing member closes the rotary channel 314. When the pressure of the combustion chamber 2 and the combustion products are returned, the opening and closing member opens the rotary channel 314.

[0060] Reference Fig.12For ease of description, the surface of the regulating plate 31 close to the combustion chamber 2 is defined as the facing surface 315 (the facing surface 315 is the surface impacted when the pressure wave and / or the combustion product are transmitted back), the facing surface 315 is provided with a reversing groove 316, and one end of the rotating channel 314 close to the facing surface 315 is connected to the reversing groove 316; the opening and closing member includes a reversing plate 317 and a torsion spring, one side of the reversing plate 317 is hinged to the inner wall of the reversing groove 316, and the other side of the reversing plate 317 is defined as the free side of the reversing plate 317; the torsion spring (not shown in the figure) is installed at the hinge between the reversing plate 317 and the reversing groove 316, and the torsion spring normally forces the surface of the reversing plate 317 to be flush with the facing surface 315 and close to the end of the rotating channel 314 close to the facing surface 315, and when the pressure wave and / or the combustion product are transmitted back and impact the reversing plate 317, the free side of the reversing plate 317 is flipped into the reversing groove 316 to open the end of the rotating channel 314 close to the facing surface 315.

[0061] The implementation principle of Example 3 of the present application is: when the pressure wave and / or combustion product generated in the combustion chamber 2 is transmitted back, the pressure wave and / or combustion product is transmitted back to impact the flip plate 317 to open the rotation channel 314, and part of the pressure wave and / or combustion product enters the adjacent adjustment channel 311 through the rotation channel 314, and collides with the pressure wave and / or combustion product in the adjacent adjustment channel 311, thereby weakening the pressure wave and / or combustion product in the adjacent adjustment channel 311, forming a first-level weakening. After the pressure wave and / or combustion product is transmitted back to the intake flow channel 11, the intake flow channel 11 of the "Tesla valve" structure forms a second-level weakening of the returned pressure wave and / or combustion product, so that the pressure wave and / or combustion product transmission back has little effect on the forward entry of air and fuel, thereby reducing the total intake pressure loss and improving the total pressure gain of the rotating detonation combustion chamber 2.

[0062] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A structure for inducing intake pre-swirl in the propagation direction of detonation waves in a rotating detonation combustion chamber, characterized in that: The invention comprises an intake housing (1) arranged at the inlet of a combustion chamber (2), an intake flow passage (11) being provided in the intake housing (1), the intake flow passage (11) comprising an intake passage (111), a connecting passage (112), an expansion passage (113) and a return passage (114), one end of the intake passage (111) being used for introducing air and fuel, and the other end being connected to the connecting passage (112), the small end of the expansion passage (113) being connected to the connecting passage (112) and being away from the intake passage The expansion channel (111) is connected to one end of the expansion channel (113), and the large end of the expansion channel (113) is connected to the combustion chamber (2); the inlet end of the reflow channel (114) is connected to one end of the connecting channel (112) away from the expansion channel (113), and the outlet end of the reflow channel (114) is connected to the intake channel (111); a plurality of guide vanes (12) arranged at intervals in the circumferential direction are provided in the expansion channel (113), and a pre-swirl channel (121) for pre-swirl gas is formed between two adjacent guide vanes (12).

2. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 1, characterized in that: The reflux channel (114) comprises a straight section (1141) and an arc section (1142); the straight section (1141) and the connecting channel (112), as well as the expansion channel (113) and the connecting channel (112) are all connected in a straight line; one end of the arc section (1142) is connected to an end of the straight section (1141) away from the connecting channel (112), and the other end is connected to the air intake channel (111); and the angle between the air intake channel (111) and the straight section (1141) is an acute angle.

3. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 1, characterized in that: The side wall of the air intake housing (1) close to the combustion chamber (2) is provided with a coaxially arranged inner cylinder (13) and an outer cylinder (14); the outer peripheral wall of the inner cylinder (13) and the inner peripheral wall of the outer cylinder (14) are spaced apart to form a connecting channel (15); one end of the connecting channel (15) is connected to the large end of the expansion channel (113), and the other end is connected to the combustion chamber (2); the expansion channel (113) is connected to the combustion chamber (2) through the connecting channel (15); and an adjusting mechanism (3) for adjusting the gas pre-swirl angle is provided in the connecting channel (15).

4. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 3, characterized in that: The adjustment mechanism (3) comprises an adjustment sheet (31) and an adjustment assembly. The adjustment sheet (31) is arranged in the connection channel (15) and is arranged in a plurality at intervals around the circumference of the inner cylinder (13). The plurality of adjustment sheets (31) are arranged corresponding to the plurality of guide vanes (12). One side of each of the adjustment sheets (31) is hinged to a side of the corresponding guide vane (12) close to the connection channel (15), and an adjustment channel (311) is formed between two adjacent adjustment sheets (31). The adjustment assembly is arranged in the outer cylinder (14) to drive the free ends of all the adjustment sheets (31) to flip synchronously.

5. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 4, characterized in that: A rotating shaft (312) is provided at one end of the adjusting piece (31), and the rotating shaft (312) is rotatably connected to the guide vane (12), and one side of the adjusting piece (31) is hinged to the corresponding guide vane (12) through the rotating shaft (312); a rotating groove (141) is provided on the end surface of the outer cylinder (14) close to the combustion chamber (2), and an adjusting rod (313) is provided on the free side of each adjusting piece (31), and one end of the adjusting rod (313) penetrates into the rotating groove (141); The joint assembly comprises an adjusting ring (32), a rotating member and a limiting member. The adjusting ring (32) is rotatably mounted on the rotating groove (141). When the adjusting ring (32) rotates around its own central axis, the adjusting ring (32) drives all the adjusting plates (31) to turn synchronously through the adjusting rod (313). The rotating member is detachably arranged on the outer cylinder (14) to drive the adjusting ring (32) to rotate. The limiting member is arranged on the outer cylinder (14) to limit the free rotation of the adjusting ring (32).

6. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 5, characterized in that: The inner wall of the outer cylinder (14) is provided with a plurality of first penetration grooves (142) connected to the rotation groove (141), and the plurality of first penetration grooves (142) are arranged corresponding to the plurality of adjustment plates (31), and each of the first penetration grooves (142) is arranged in an arc shape around the central axis of the rotation shaft (312) so as to allow the adjustment rod (313) corresponding to the adjustment plate (31) to extend into the rotation groove (141); the adjustment ring (32) is provided with a plurality of second penetration grooves (321), and the plurality of second penetration grooves (321) are arranged corresponding to the plurality of adjustment plates (31). The through grooves (321) are arranged corresponding to a plurality of adjustment plates (31), and both ends of each of the second through grooves (321) are arranged to extend along the axial direction of the outer cylinder (14) so ​​as to be used for inserting an adjustment rod (313) corresponding to the adjustment plate (31). When the adjustment ring (32) rotates around its own central axis, the adjustment ring (32) pushes the adjustment rod (313) through the inner wall of the second through groove (321) to force the adjustment rod (313) to move along the arc of the first through groove (142).

7. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 5, characterized in that: The rotating member comprises a mounting seat (33), a docking plate (34) and a rotating plate (35); the docking plate (34) and the rotating plate (35) are respectively rotatably mounted on two ends of the mounting seat (33); a docking rod (341) is provided on a side wall of the docking plate (34) away from the mounting seat (33); a docking hole (322) for the docking rod (341) to be inserted is provided on a side wall of the adjusting ring (32); a mounting groove (331) is provided on a side wall of the mounting seat (33) close to the docking plate (34); a rotating rod (351) is coaxially connected to the rotating plate (35); one end of the rotating rod (351) away from the rotating plate (35) extends into the mounting groove (331) and is coaxially connected to a rotating gear (352); a side wall of the docking plate (34) close to the mounting groove (331) is coaxially connected to a rotating ring gear (342); the rotating gear (352) and the rotating ring gear (342) are meshed for transmission.

8. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 7, characterized in that: A plurality of transition tooth groups (4) are arranged in the installation groove (331), and the plurality of transition tooth groups (4) are arranged at intervals around the central axis of the rotating rod (351); each of the transition tooth groups (4) comprises a plurality of transition gears (41) rotatably installed on the inner wall of the installation groove (331), and the diameters of the plurality of transition gears (41) gradually increase from a side close to the center position of the installation groove (331) to a side away from the center position of the installation groove (331), and two adjacent transition gears (41) are meshed for transmission; the rotating gear (352) is meshed for transmission with the transition gear (41) with the smallest diameter, and the rotating gear ring (342) is meshed for transmission with the transition gear (41) with the largest diameter, and the rotating gear (352) and the rotating gear ring (342) are meshed for transmission via the plurality of transition tooth groups (4).

9. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 7, characterized in that: The limiting member comprises a limiting rod (36) and a limiting spring (37); the limiting rod (36) is slidably installed in the rotation groove (141); the limiting spring (37) is installed between the limiting rod (36) and the inner wall of the rotation groove (141); the limiting spring (37) normally forces the limiting rod (36) to be inserted into the docking hole (322) of the adjustment ring (32) to limit the free rotation of the adjustment ring (32); a plurality of docking holes (322) are arranged around the central axis of the adjustment ring (32); when the docking rod (341) of the docking plate (34) is inserted into the docking hole (322), the docking rod (341) forces the limiting rod (36) to disengage from the docking hole (322).

10. The structure for inducing intake pre-swirl in the propagation direction of detonation wave in a rotating detonation combustion chamber according to claim 4, characterized in that: A rotating channel (314) is provided on the surface of the regulating plate (31), and two adjacent regulating channels (311) are connected to each other through the rotating channel (314), and two ends of the rotating channel (314) are respectively oriented toward the outlet ends of the two adjacent regulating channels (311); the regulating plate (31) is provided with an opening and closing member for opening and closing the rotating channel (314), and when the gas flows from the inlet end of the regulating channel (311) to the outlet end of the regulating channel (311), the opening and closing member closes the rotating channel (314), and when the pressure of the combustion chamber (2) and the combustion products are returned, the opening and closing member opens the rotating channel (314).

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