A low-loss adjustable inlet device for a rotating detonation combustor

Abstract

This application relates to the technical field of detonation engines and discloses an inlet device for a low-loss adjustable rotary detonation combustion chamber, which includes a throat section for mixing hot air and fuel. An air inlet for inputting hot air and a fuel inlet for inputting fuel are provided in the throat section. The throat section includes a throat inner cylinder and a throat outer cylinder located outside the throat inner cylinder. A ring slot channel is provided between the throat inner cylinder and the throat outer cylinder. The ring slot channel communicates with the air inlet and the fuel inlet. An adjusting mechanism for regulating the size of the ring slot channel is provided on the throat outer cylinder. This application does not require repeated disassembly and replacement of the throat section when calculating the optimal mixing ratio of hot air and fuel, and has the effect of simple operation.

Description

Technical Field

[0001] The present application relates to the technical field of detonation engines, and in particular to a low-loss adjustable rotating detonation combustion chamber inlet device. Background Art

[0002] As a new concept engine, the detonation engine uses detonation combustion to consume the combustible mixture and then generate power. It has the advantages of high thermal cycle efficiency and simple structure. Rotating detonation is a form of detonation combustion. It occurs in the combustion chamber of the coaxial annular cavity structure. It only needs to be ignited once during operation. After that, as long as the supply of oxidant and fuel mixture is guaranteed, it can continuously provide stable thrust.

[0003] The rotating detonation engine in the prior art generally uses heated air as an oxidant. The hot air and fuel are mixed in the throat of the engine. The formed mixture then enters the detonation combustion ring together and detonates in the detonation combustion ring to generate thrust.

[0004] In the process of realizing the present application, the inventors found that the technology has at least the following problems: in order to make the mixture of hot air and fuel reach the maximum thrust when detonating, the hot air and fuel need to be mixed in a certain optimal ratio. In order to measure the size of the above-mentioned optimal mixing ratio, the input ratio of hot air and fuel needs to be repeatedly adjusted. This test process requires repeated disassembly and replacement of the throat section in the engine, which is cumbersome and needs to be improved. Summary of the invention

[0005] In order to solve the problem of repeatedly dismantling and replacing the throat section when calculating the optimal mixing ratio of hot air and fuel, the present application provides a low-loss adjustable rotating detonation combustion chamber inlet device.

[0006] The low-loss adjustable rotating detonation combustion chamber inlet device provided in the present application adopts the following technical solution:

[0007] A low-loss adjustable rotating detonation combustion chamber inlet device comprises a throat section for mixing hot air and fuel, wherein the throat section is provided with an air inlet for inputting hot air and an oil inlet for inputting fuel, the throat section comprises a throat inner tube and a throat outer tube located outside the throat inner tube, an annular gap channel is provided between the throat inner tube and the throat outer tube, the annular gap channel connects the air inlet and the oil inlet, and the throat outer tube is provided with an adjusting mechanism for adjusting the size of the annular gap channel.

[0008] By adopting the above technical solution, when the size of the fuel inlet is constant, in order to measure the optimal mixing ratio that generates the maximum thrust when hot air and fuel detonate, it can be achieved by controlling the intake air volume of the hot air, that is, by regulating the size of the annular gap channel for mixing the hot air and the fuel. In this application, the adjusting mechanism for controlling the size of the annular gap channel is directly arranged on the outer cylinder of the throat. During measurement, the operator only needs to operate the adjusting mechanism correspondingly to change the size of the annular gap channel and the mixing ratio of the hot air and the fuel. Compared with the method of frequently manually disassembling and replacing throat sections of different sizes, the operation convenience is higher.

[0009] Optionally, the adjusting mechanism includes a mounting seat arranged on the outer cylinder of the throat, a plurality of adjusting blocks rotatably connected to the mounting seat, and a driving component for driving the adjusting blocks to rotate synchronously. The annular gap channel is formed by enclosing the outer side wall of the inner cylinder of the throat and the adjusting blocks.

[0010] By adopting the above technical solution, usually, the inner cylinder of the throat is in a static state, so the inner diameter of the annular gap channel is constant. When adjusting the size of the annular gap channel, the driving component can be used to drive the adjusting blocks to rotate, so as to change the state of the adjusting blocks forming the outer wall of the annular gap channel, thereby realizing the adjustment of the outer diameter size of the annular gap channel. Each adjusting block is synchronously linked through the same driving component, with high adjustment efficiency and good integrity.

[0011] Optionally, the driving component includes a turntable rotatably arranged on the adjusting seat, a guiding cylinder arranged on the side of the adjusting block close to the turntable, and a positioning block arranged on the side of the adjusting block far from the turntable. The turntable is provided with guiding holes respectively and slidably matched with the guiding cylinders. The guiding holes extend along the radial direction of the turntable and are circumferentially distributed along the central axis of the turntable; the mounting seat is provided with positioning grooves respectively and slidably matched with the positioning blocks, and each positioning groove is circumferentially distributed along the central axis of the turntable; when the turntable rotates, the guiding cylinder will slide along the guiding hole and the positioning block will slide along the positioning groove, thereby driving the adjusting block to rotate.

[0012] By adopting the above technical solution, during the rotation of the turntable, the side wall of the guiding hole will generate a certain thrust on the guiding cylinder, causing the guiding cylinder to slide along the guiding hole and the adjusting block to rotate accordingly under the guiding action of the positioning block and the positioning groove, thereby realizing the synchronous contraction or expansion of each adjusting block. The structure is simple and the assembly is convenient.

[0013] Optionally, a lever is fixedly connected to the circumferential side wall of the turntable.

[0014] By adopting the above technical solution, the lever can be connected to an external adjusting motor to drive the turntable to rotate by using the adjusting motor, thereby increasing the lever arm when the turntable rotates, which is labor-saving and convenient.

[0015] Optionally, one side of the adjusting block is provided with an abutting block, and the other side is provided with an abutting groove that slidably cooperates with the adjacent abutting block; when the adjusting block rotates under the action of the driving component, the abutting block can slide along the abutting groove that slidably cooperates with itself.

[0016] By adopting the above technical solution, when the driving component is assembled in place, the abutting blocks connected to each adjusting block are respectively slidably arranged in the adjacent abutting grooves. With such a setting, not only can the integrity and linkage effect of the driving component be effectively enhanced, but also the relative movement of each adjusting block along the axial direction of the turntable can be hindered, which helps to improve the stability of the adjusting block during movement.

[0017] Optionally, the outer throat cylinder is provided with an air inlet guiding arc surface at the air inlet, and the air inlet guiding arc surface extends from the inner wall of the outer throat cylinder to the side wall of the adjusting block close to the inner throat cylinder.

[0018] By adopting the above technical solution, the air inlet guiding arc surface plays a guiding role when the hot air is input into the annular gap channel from the air inlet, which is beneficial to reducing the energy loss generated when the energy passes through the transition part between the air inlet section of the outer throat cylinder and the adjusting block.

[0019] Optionally, an air inlet transition block is provided on the side of the adjusting block facing the air inlet guiding arc surface, and an air inlet transition arc surface is provided at one end of the air inlet transition block facing the inner throat cylinder; when the driving component works, the air inlet transition arc surface, the air inlet guiding arc surface, and the side surface of the adjusting block close to the inner throat cylinder can form a smooth transition in at least one state.

[0020] By adopting the above technical solution, the air inlet transition arc surface can reduce the height difference formed between the air inlet section of the outer throat cylinder and the adjusting block, and plays a further guiding role when the hot air is fed, so that the air flow is not likely to pass through a suddenly constricted flow channel during the input process, which is beneficial to further reducing the energy loss generated when the hot air is input.

[0021] Optionally, the outer throat cylinder is provided with an air outlet guiding arc surface on the side of the annular gap channel far from the air inlet, and the air outlet guiding arc surface extends from the inner wall of the outer throat cylinder to the side wall of the adjusting block close to the inner throat cylinder.

[0022] By adopting the above technical solution, the air outlet guiding arc surface plays a guiding role when the hot air is output from the annular gap channel, which is beneficial to reducing the energy loss generated when the energy passes through the transition part between the adjusting block and the air outlet section of the outer throat cylinder.

[0023] Optionally, an air outlet transition block is provided on the side of the adjusting block facing the air outlet guiding arc surface, and an air outlet transition arc surface is provided at one end of the air outlet transition block facing the inner throat cylinder; when the driving component works, the air outlet transition arc surface, the air outlet guiding arc surface, and the side surface of the adjusting block close to the inner throat cylinder can form a smooth transition in at least one state.

[0024] By adopting the above technical solution, the air outlet transition arc surface can reduce the height difference formed between the adjusting block and the air outlet section of the throat outer cylinder, and play a further guiding role when the mixture of hot air and fuel is discharged, so that the mixture is not likely to pass through a suddenly expanding flow channel during the output process, which is beneficial to further reducing the energy loss generated when the mixture is output.

[0025] Optionally, an oil storage ring cavity is formed in the throat inner cylinder, and an oil passage communicating the oil storage ring cavity with the outside is provided, and the oil inlet is opened on the cavity wall of the oil storage ring cavity.

[0026] By adopting the above technical solution, when refueling, the fuel can be input into the oil storage ring cavity through the opening on the side of the oil passage communicating with the outside, and then input into the ring gap channel through the oil inlet. The oil inlet is opened on the throat inner cylinder and will not affect the control action of the adjusting mechanism.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. An adjusting mechanism is provided on the throat outer cylinder. When calculating the optimal mixing ratio of hot air and fuel, the size of the ring gap channel can be adjusted through the adjusting mechanism without repeatedly disassembling and replacing the throat section, and the operation is simple;

[0029] 2. The adjustment of the size of the ring gap channel is realized by rotating the dial rod and then driving the adjusting block to rotate by the turntable, with a simple structure and convenient operation;

[0030] 3. The intake guiding arc surface and the intake transition arc surface play a guiding role when the hot air is fed, and the air outlet guiding arc surface and the air outlet transition arc surface play a guiding role when the mixture is discharged, which helps to reduce the energy loss generated during the transmission process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a side view of an embodiment of the present application.

[0032] Figure 2 is a schematic cross-sectional view of an embodiment of the present application.

[0033] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0034] Figure 4 is a schematic structural view of the adjusting mechanism in an embodiment of the present application.

[0035] Figure 5 is an exploded schematic view of the adjusting mechanism in an embodiment of the present application, mainly showing the structure of the positioning groove.

[0036] Figure 6 is an exploded schematic view of the adjusting mechanism from another perspective in an embodiment of the present application, mainly showing the structure of the positioning block.

[0037] Figure 7 It is a schematic structural diagram when two adjacent adjusting blocks are assembled.

[0038] Description of the reference numerals:

[0039] 1. Drainage section; 11. Drainage inner cylinder; 12. Drainage outer cylinder; 13. Support; 131. Connecting rod; 14. Drainage ring cavity; 2. Throat section; 21. Throat inner cylinder; 211. Oil storage ring cavity; 212. Oil passage; 213. Oil inlet; 22. Throat outer cylinder; 221. Intake air guiding arc surface; 222. Exhaust gas guiding arc surface; 23. Intake air port; 24. Annular gap passage; 3. Detonation combustion cylinder; 4. Adjusting mechanism; 41. Mounting seat; 411. Rotating groove; 412. Positioning groove; 42. Adjusting block; 421. Abutting block; 422. Abutting groove; 423. Intake air transition block; 424. Intake air transition arc surface; 425. Exhaust gas transition block; 426. Exhaust gas transition arc surface; 43. Driving assembly; 431. Turntable; 432. Guide cylinder; 433. Positioning block; 434. Guide hole; 44. Pusher rod. Detailed implementation manners

[0040] The following further elaborates on this application Figure 1-7 in conjunction with the attached drawings.

[0041] The embodiment of this application discloses an inlet device for a low-loss adjustable rotating detonation combustor.

[0042] Refer to Figure 1 , Figure 2 , the inlet device for a low-loss adjustable rotating detonation combustor includes a drainage section 1 for draining hot air and a throat section 2 for mixing hot air and fuel. The side of the throat section 2 far from the drainage section 1 is connected to a detonation combustion cylinder 3, and the mixture of hot air and fuel detonates in the detonation combustion cylinder 3 to generate thrust.

[0043] Refer to Figure 1 , Figure 2 , the drainage section 1 includes a drainage inner cylinder 11, a drainage outer cylinder 12, and a support 13 for connecting the drainage inner cylinder 11 and the drainage outer cylinder 12. The drainage outer cylinder 12 is sleeved outside the drainage inner cylinder 11, and a drainage ring cavity 14 is formed between the drainage outer cylinder 12 and the drainage inner cylinder 11. Hot air is transmitted from the drainage ring cavity 14 to the throat section 2.

[0044] Refer to Figure 1 , Figure 2 , since the size of a detonation engine is usually large, for the convenience of processing and transportation of the drainage outer cylinder 12 and the drainage inner cylinder 11, the above-mentioned drainage outer cylinder 12 and drainage inner cylinder 11 can be set as a multi-section assembled structure. In this embodiment, the drainage outer cylinder 12 is shown as a two-section structure, and two adjacent sections of the drainage outer cylinder 12 are fixedly connected by means of flange splicing.

[0045] Referring to Figure 2 , the bracket 13 includes a plurality of connecting rods 131 that are circumferentially and evenly distributed on the outer side of the drainage inner cylinder 11. One end of each connecting rod 131 is fixedly arranged on the outer side wall of the drainage inner cylinder 11, and the other end is fixedly arranged on the inner side wall of the drainage outer cylinder 12. In this embodiment, the number of the connecting rods 131 is preferably twelve. In other embodiments, the above bracket 13 can also be set to other numbers or forms, and any structure that can achieve the fixed connection between the drainage inner cylinder 11 and the drainage outer cylinder 12 is acceptable.

[0046] Referring to Figure 2 , the throat section 2 includes a throat inner cylinder 21 fixed to one side of the drainage inner cylinder 11 and a throat outer cylinder 22 fixed to one side of the drainage outer cylinder 12. The throat outer cylinder 22 is sleeved on the outer side of the throat inner cylinder 21, so that an annular air passage is formed therebetween. One side of the throat section 2 communicating with the drainage annular passage forms an air inlet 23, and one side communicating with the detonation combustion cylinder 3 forms an air outlet. That is, the throat section 2 is an intake section at the air inlet 23 and an outlet section at the air outlet.

[0047] Referring to Figure 2 , Figure 3 , an oil storage ring cavity 211 and an oil passage 212 are formed in the throat inner cylinder 21. One end of the oil passage 212 communicates with the oil storage ring cavity 211, and the other end communicates with the outside. Specifically, the oil passage 212 can extend outward along the throat inner cylinder 21, the drainage inner cylinder 11, the bracket 13 and the drainage outer cylinder 12 in sequence, and fuel can flow into the oil storage ring cavity 211 through the oil passage 212.

[0048] Referring to Figure 2 , Figure 3 , a plurality of oil inlets 213 are circumferentially and evenly distributed on the cavity wall of the oil storage ring cavity 211. The fuel stored in the oil storage ring cavity 211 can be output from the oil inlets 213 to the air passage formed by the throat inner cylinder 21 and the throat outer cylinder 22.

[0049] Referring to Figure 2 , Figure 3 , a ring gap channel 24 is provided between the throat inner cylinder 21 and the throat outer cylinder 22. The ring gap channel 24 communicates the air inlet 23 with each oil inlet 213, so that hot air and fuel can be mixed in the ring gap channel 24.

[0050] Referring to Figure 2 , Figure 4, an adjusting mechanism 4 for regulating the size of the annular gap channel 24 is provided on the outer cylinder 22 of the throat. The adjusting mechanism 4 includes a mounting seat 41 fixed on the outer cylinder 22 of the throat, a plurality of adjusting blocks 42 rotatably connected to the mounting seat 41, and a driving assembly 43 for driving the synchronous rotation of each adjusting block 42. One end of the adjusting block 42 penetrates into the interior of the outer cylinder 22 of the throat, and the side surfaces of the adjusting blocks 42 close to the inner cylinder 21 of the throat jointly enclose a polygonal hole. The annular gap channel 24 is formed by the hole wall of the polygonal hole and the outer wall of the inner cylinder 21 of the throat. To make the polygonal hole approximate a circular hole, the adjusting blocks 42 should be set to as many as possible according to the actual situation.

[0051] Refer to Figure 5 , Figure 6 , the driving assembly 43 includes a turntable 431, a guiding cylinder 432 fixed on the side of the adjusting block 42 close to the turntable 431, and a positioning block 433 fixed on the side of the adjusting block 42 far from the turntable 431. A circular rotating groove 411 is formed on one end face of the mounting seat 41, and the turntable 431 is rotatably arranged in the rotating groove 411. The turntable 431 is provided with guiding holes 434 that are equal in number to the guiding cylinders 432 and are respectively in sliding fit. Each guiding hole 434 extends along the radial direction of the turntable 431 and is circumferentially evenly distributed along the central axis of the turntable 431. On the groove wall of the rotating groove 411, positioning grooves 412 that are equal in number to the positioning blocks 433 and are respectively in sliding fit are formed. Each positioning groove 412 extends along a straight line and is circumferentially distributed along the central axis of the turntable 431.

[0052] Refer to Figure 5 , Figure 6 , when the turntable 431 rotates, the hole wall of the guiding hole 434 will generate a thrust on the guiding cylinder 432, causing the guiding cylinder 432 to push the adjusting block 42 to move synchronously and the positioning block 433 to slide along the positioning groove 412, thereby enabling each adjusting block 42 to rotate synchronously to drive the contraction or expansion of the hole wall of the polygonal hole and the decrease or increase of the aperture of the polygonal hole, so as to realize the adjustment of the outer diameter of the annular gap channel 24.

[0053] Refer to Figure 4 , Figure 5 , for the convenience of rotating the turntable 431, a lever 44 is fixedly connected to the circumferential side wall of the turntable 431, and a notch for the lever 44 to pass through is formed on the groove wall of the rotating groove 411. The lever 44 can be connected to an adjusting motor located outside the outer cylinder 22 of the throat, so as to use the adjusting motor to control the lever 44 to drive the turntable 431 to rotate, which is labor-saving and convenient.

[0054] Refer to Figure 4 , Figure 7, to improve the integrity of the adjusting mechanism 4, a butting block 421 is integrally formed on one side of each adjusting block 42, and a butting groove 422 that slidably cooperates with the adjacent butting block 421 is formed on the other side. When the adjusting block 42 rotates under the action of the driving component 43, the adjusting block 42 will slide along the butting groove 422 that slidably cooperates with itself, and the linkage between the adjusting blocks 42 is good.

[0055] Refer to Figure 2 , Figure 3 , at the air inlet 23 of the throat outer cylinder 22, an air inlet guiding arc surface 221 is provided, and the air inlet guiding arc surface 221 extends from the inner wall of the throat outer cylinder 22 towards the side wall of the adjusting block 42 close to the throat inner cylinder 21. An air inlet transition block 423 is integrally formed on one side of the adjusting block 42 facing the air inlet guiding arc surface 221, and an air inlet transition arc surface 424 is provided at one end of the air inlet transition block 423 facing the throat inner cylinder 21. The air inlet transition arc surface 424 and the side surface of the adjusting block 42 close to the throat inner cylinder 21 form a smooth transition. And when the driving component 43 works, the air inlet transition block 423 will rotate synchronously with the adjusting block 42, so that the air inlet guiding arc surface 221, the air inlet transition arc surface 424, and the side surface of the adjusting block 42 close to the throat inner cylinder 21 can form a smooth transition in at least one state, thereby playing a guiding role when hot air enters, so as to prevent the air flow from passing through a suddenly constricted flow channel during input, which helps to reduce energy loss.

[0056] Refer to Figure 2 , Figure 3 , at the side of the annular gap channel 24 of the throat outer cylinder 22 far from the air inlet 23, an air outlet guiding arc surface 222 is provided, and the air outlet guiding arc surface 222 extends from the inner wall of the throat outer cylinder 22 towards the side wall of the adjusting block 42 close to the throat inner cylinder 21. An air outlet transition block 425 is integrally formed on one side of the adjusting block 42 facing the air outlet guiding arc surface 222, and an air outlet transition arc surface 426 is provided on the side of the air outlet transition block 425 facing the throat inner cylinder 21. The air inlet transition arc surface 424, the side surface of the adjusting block 42 close to the throat inner cylinder 21, and the air outlet guiding arc surface 222 form a smooth transition. And when the driving component 43 works, the air outlet transition block 425 will also rotate synchronously with the adjusting block 42, so that the side surface of the adjusting block 42 close to the throat inner cylinder 21, the air outlet transition arc surface 426, and the air outlet guiding arc surface 222 can form a smooth transition in at least one state, thereby playing a guiding role when the mixture of hot air and fuel exits, so as to prevent the air flow from passing through a suddenly expanding flow channel when output to the detonation combustion cylinder 3, which helps to further reduce energy loss. It should be noted that to prevent the air inlet transition block 423 and the air outlet transition block 425 from affecting the rotation of the adjusting block 42, the air inlet transition block 423 and the air outlet transition block 425 should be arranged at one end of the adjusting block 42 close to the throat inner cylinder 21.

[0057] The implementation principle of an inlet device for a low-loss adjustable rotary detonation combustor according to an embodiment of the present application is as follows: After hot air is input into the throat section 2 through the diversion section 1, it is mixed with fuel in the annular gap channel 24, and the mixture is output to the detonation combustion chamber 3 to initiate detonation and generate thrust. When calculating the optimal mixing ratio of hot air and fuel, with the size of the fuel inlet 213 being constant, the rotation of the turntable 431 can be controlled by the lever 44, so that each adjusting block 42 is synchronously linked, thereby changing the outer diameter size of the annular gap channel 24 and the intake air volume of hot air. During the calculation, the operator only needs to control the rotation of the lever 44 through the adjusting motor, and then the size of the annular gap channel 24 and the mixing ratio of hot air and fuel can be changed, and the operation is simple and convenient.

[0058] The above are all preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A low-loss adjustable rotary detonation combustion chamber inlet device, comprising a throat section (2) for mixing hot air and fuel, wherein an air inlet (23) for inputting hot air and a fuel inlet (213) for inputting fuel are formed in the throat section (2), and it is characterized in that: The throat section (2) includes a throat inner cylinder (21) and a throat outer cylinder (22) located outside the throat inner cylinder (21). A ring slot channel (24) is provided between the throat inner cylinder (21) and the throat outer cylinder (22). The ring slot channel (24) communicates with the air inlet (23) and the oil inlet (213). An adjusting mechanism (4) for regulating the size of the ring slot channel (24) is provided on the throat outer cylinder (22). The adjusting mechanism (4) includes a mounting seat (41) provided on the throat outer cylinder (22), a plurality of adjusting blocks (42) rotatably connected to the mounting seat (41), and a driving assembly (43) for driving the adjusting blocks (42) to rotate synchronously. The ring slot channel (24) is formed by enclosing the outer side wall of the throat inner cylinder (21) and the adjusting blocks (42). The driving assembly (43) includes a turntable (431) rotatably provided on the adjusting seat, a guiding cylinder (432) provided on one side of the adjusting block (42) close to the turntable (431), and a positioning block (433) provided on the other side of the adjusting block (42) away from the turntable (431). The turntable (431) is provided with guiding holes (434) respectively slidably matched with the guiding cylinders (432). The guiding holes (434) extend along the radial direction of the turntable (431) and are circumferentially distributed along the central axis of the turntable (431). The mounting seat (41) is provided with positioning grooves (412) respectively slidably matched with the positioning blocks (433). Each of the positioning grooves (412) is circumferentially distributed along the central axis of the turntable (431). When the turntable (431) rotates, the guiding cylinder (432) slides along the guiding hole (434), and the positioning block (433) slides along the positioning groove (412), thereby driving the adjusting block (42) to rotate.

2. The inlet device of the low-loss adjustable rotary detonation combustor according to claim 1, characterized in that: A lever (44) is fixedly connected to the circumferential side wall of the turntable (431).

3. The inlet device of the low-loss adjustable rotary detonation combustor according to claim 1, wherein: One side of the adjusting block (42) is provided with an abutting block (421), and the other side is provided with an abutting groove (422) slidably matched with the adjacent abutting block (421). When the adjusting block (42) rotates under the action of the driving assembly (43), the abutting block (421) can slide along the abutting groove (422) slidably matched with itself.

4. The inlet device of the low-loss adjustable rotating detonation combustor according to claim 1, characterized in that: The throat outer cylinder (22) is provided with an air inlet guiding arc surface (221) at the air inlet (23). The air inlet guiding arc surface (221) extends from the inner wall of the throat outer cylinder (22) towards the side wall of the adjusting block (42) close to the throat inner cylinder (21).

5. The inlet device of the low-loss adjustable rotary detonation combustor according to claim 4, characterized in that: An air inlet transition block (423) is provided on one side of the adjusting block (42) facing the air inlet guiding arc surface (221). An air inlet transition arc surface (424) is provided at one end of the air inlet transition block (423) facing the throat inner cylinder (21). When the driving assembly (43) works, the air inlet transition arc surface (424), the air inlet guiding arc surface (221), and the side surface of the adjusting block (42) close to the throat inner cylinder (21) can form a smooth transition in at least one state.

6. The inlet device of the low-loss adjustable rotary detonation combustor according to claim 1, characterized in that: The outer throat cylinder (22) is provided with an air outlet guiding arc surface (222) on the side of the annular gap channel (24) away from the air inlet (23), and the air outlet guiding arc surface (222) extends from the inner wall of the outer throat cylinder (22) towards the side wall of the adjusting block (42) close to the inner throat cylinder (21).

7. The inlet device of the low-loss adjustable rotary detonation combustor according to claim 6, characterized in that: An air outlet transition block (425) is provided on the side of the adjusting block (42) facing the air outlet guiding arc surface (222), and an air outlet transition arc surface (426) is provided at one end of the air outlet transition block (425) facing the inner throat cylinder (21); when the driving assembly (43) works, the air outlet transition arc surface (426), the air outlet guiding arc surface (222), and the side surface of the adjusting block (42) close to the inner throat cylinder (21) can form a smooth transition in at least one state.

8. The inlet device of the low-loss adjustable rotary detonation combustor according to claim 1, characterized in that: An oil storage ring cavity (211) and an oil passage (212) communicating the oil storage ring cavity (211) with the outside are formed in the inner throat cylinder (21), and the oil inlet (213) is opened on the cavity wall of the oil storage ring cavity (211).

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