Rotating detonation engine oil injection device with detachable fuel injection hole and working method

Abstract

The present invention belongs to the technical field of rotary detonation engines, and in particular to an oil injection device of a rotary detonation engine with a detachable fuel nozzle and a working method, wherein the oil injection device is located between an isolation section flow channel and a combustion chamber flow channel, the isolation section flow channel comprises an isolation section outer ring, an isolation section inner ring concentrically arranged inside the isolation section outer ring, the combustion chamber flow channel comprises a combustion chamber outer ring, and a combustion chamber inner ring concentrically arranged inside the combustion chamber outer ring, the oil injection device comprises, from outside to inside, a concentrically arranged oil injection section outer ring and an oil injection section inner ring, the oil injection section outer ring comprises, from outside to inside, a concentrically arranged outer ring manifold and an outer ring oil injection ring, and the oil injection section inner ring comprises, from outside to inside, a concentrically arranged inner ring oil injection ring and an inner ring oil injection cavity, the present invention processes the end face of the oil injection pipe with the fuel nozzle, and adopts a joint to achieve a detachable sealed connection with other components of the oil injection device, so the processing difficulty and cost are relatively lower.

Description

Technical Field

[0001] The invention relates to the technical field of rotary detonation engines, in particular to a rotary detonation engine oil injection device with detachable fuel spray holes and a working method. Background Art

[0002] The rotating detonation ramjet engine is a new type of aerospace propulsion system that uses rotating detonation waves to organize combustion under supersonic incoming flow conditions. When it is working, there is a rotating detonation wave in the combustion chamber and it propagates at a high frequency along the circumference of the combustion chamber to achieve the rapid release of the chemical energy of the combustible mixture in front of the detonation wave, thereby generating thrust. Different from the deflagration combustion used in the scramjet engine, the detonation combustion mode is a premixed combustion, which has high requirements on the mixing state of the fuel and oxidant in front of the detonation wave. The poor mixing state will lead to serious loss of detonation wave propagation speed and affect the working state and performance of the engine. Therefore, in order to achieve efficient mixing of fuel and oxidant in the combustion chamber, a feasible solution is to process fuel spray holes on the walls of the annular flow channel on both sides of the inlet of the engine combustion chamber. The fuel spray holes are evenly distributed in the circumferential direction. The fuel is ejected from the oil injection holes on the walls of the annular flow channel on both sides and mixed with the incoming air in the annular flow channel to form a combustible mixture. This component can be called the oil injection section. Current research has shown that arranging a sufficient number of fuel spray holes circumferentially on the wall of the oil injection section can achieve better operation of the rotating detonation ramjet engine.

[0003] To achieve fuel injection, the current common practice is to directly process the fuel injection hole on the wall of the annular oil injection section. However, this solution still has the following problems: First, in order to achieve sufficient mixing of the fuel and the oxidant, a sufficient number of fuel injection holes must be arranged along the circumferential direction of the oil injection section. Under the premise of a certain total fuel injection flow rate, the diameter of the fuel injection hole will inevitably be reduced (generally less than 0.4 mm). Directly processing small-diameter fuel injection holes on the wall of the oil injection section will significantly increase the difficulty and cost of processing; second, due to the small diameter of the fuel injection hole, the welding slag generated during processing and the tiny impurities in the kerosene during the test are very easy to It causes blockage to the fuel spray hole, and the fuel spray hole directly processed on the wall of the oil injection section is difficult to clear after being blocked, which may affect the working state of the engine at the least, and cause the engine to fail to work normally at the worst, which has a great impact on the engine test; thirdly, after the fuel spray hole is directly processed on the wall of the oil injection section, the arrangement of the spray holes in the oil injection section (aperture, number, etc.) cannot be adjusted. Therefore, when conducting research on different injection schemes in the experiment, it is inevitable to process multiple sets of oil injection sections of different specifications. On the one hand, it increases the processing cost of the test model, and on the other hand, it also leads to frequent disassembly and assembly of the test model during the test, which seriously affects the test efficiency.

[0004] Taking the above into consideration, the present invention proposes a rotating detonation engine oil injection device with a detachable fuel nozzle. Through reasonable design, the fuel nozzle on the engine oil injection section can be easily disassembled. On the one hand, it can reduce the difficulty and manufacturing cost of the oil injection section model processing. On the other hand, by disassembling the fuel nozzle, the fuel nozzle on the oil injection section can also be quickly unblocked and replaced, which can help control test risks and improve engine test efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a rotary detonation engine oil injection device with a detachable fuel nozzle, which can realize the convenient disassembly of the fuel nozzle on the engine oil injection section, thereby reducing processing costs, controlling test risks and improving test efficiency.

[0006] To achieve the above-mentioned purpose of the invention, the technical solution of the present invention is as follows:

[0007] A rotary detonation engine oil injection device with a detachable fuel injection hole, the oil injection device is located between an isolation section flow channel and a combustion chamber flow channel, the isolation section flow channel includes an isolation section outer ring, an isolation section inner ring concentrically arranged inside the isolation section outer ring, and the combustion chamber flow channel includes a combustion chamber outer ring, a combustion chamber inner ring concentrically arranged inside the combustion chamber outer ring,

[0008] The oil injection device comprises, from the outside to the inside, an outer ring of the oil injection section and an inner ring of the oil injection section which are arranged concentrically, wherein the outer ring of the oil injection section comprises, from the outside to the inside, an outer ring manifold and an outer ring oil injection ring which are arranged concentrically, and the inner ring of the oil injection section comprises, from the outside to the inside, an inner ring oil injection ring and an inner ring oil injection cavity which are arranged concentrically,

[0009] The inner diameter of the outer ring of the isolation section is consistent with the inner diameter of the outer ring oil filling ring.

[0010] The outer diameter of the inner ring of the isolation section is consistent with the outer diameter of the inner ring oil injection ring.

[0011] The gap between the isolation section outer ring and the isolation section inner ring is the isolation section flow channel, the gap between the outer ring oil injection ring and the inner ring oil injection ring is the oil injection section flow channel, and the gap between the combustion chamber outer ring and the combustion chamber inner ring is the combustion chamber flow channel. The isolation section flow channel, the oil injection section flow channel, and the combustion chamber flow channel are sequentially connected and form an engine annular gap channel for supersonic air flow. The central axis of the oil injection section outer ring and the oil injection section inner ring coincides with the central axis of the engine annular gap channel.

[0012] The outer ring manifold is a circular pipe; the outer ring oil filling port is located on the surface of the outer ring manifold and is connected to the inner cavity of the outer ring manifold, the outer ring oil filling port is used to input fuel through the external oil pipe under pressure through the oil pump, the outer ring manifold is used to realize uniform supply of fuel to the outer ring oil filling pipe, the outer ring oil filling pipe is located between the outer ring manifold and the outer ring oil filling ring, and the outer ring oil filling pipe is evenly distributed in the circumferential direction of the outer ring manifold and the outer ring oil filling ring, and the two ends of the outer ring oil filling pipe are respectively connected to the outer ring manifold and the outer ring oil filling ring, the inner wall of the outer ring oil filling ring close to the center of the circle is evenly distributed with outer ring oil filling pipe mounting holes along the circumferential direction, the outer ring oil filling pipe mounting hole is a through hole that passes through the inner and outer walls of the outer ring oil filling ring, the outer ring oil filling pipe mounting hole is connected to the outer ring oil filling pipe, one end of the outer ring oil filling pipe extends into the inner part of the outer ring oil filling pipe mounting hole, and the number and position of the outer ring oil filling pipe mounting holes are consistent with the number and position of the outer ring oil filling pipe;

[0013] The inner ring of the oil filling section includes, from the inside to the outside, an inner ring oil filling cavity and an inner ring oil filling ring which are arranged concentrically. The inner ring oil filling cavity is a circular sealed cavity, wherein the inner ring oil filling port is located on the surface of the inner ring oil filling cavity and is connected to the inner cavity of the inner ring oil filling cavity. The inner ring oil filling port is used to input fuel through an external oil pipe under pressure through an oil pump. The inner ring oil filling pipe is used to realize uniform supply of fuel to the inner ring oil filling ring. The inner ring oil filling pipe is located between the inner ring oil filling cavity and the inner ring oil filling ring, and the inner ring oil filling pipe is located between the inner ring oil filling cavity and the inner ring oil filling ring. The oil filling ring is evenly distributed in the circumferential direction, and the two ends of the inner ring oil filling pipe are respectively connected to the inner ring oil filling cavity and the inner ring oil filling ring, the outer wall of the inner ring oil filling ring away from the center of the circle is evenly distributed with inner ring oil filling pipe mounting holes along the circumferential direction, the inner ring oil filling pipe mounting holes are through holes that penetrate the inner and outer walls of the inner ring oil filling ring, the inner ring oil filling pipe mounting holes are connected to the inner ring oil filling pipe, one end of the inner ring oil filling pipe extends into the inner ring oil filling pipe mounting hole, and the number and positions of the inner ring oil filling pipe mounting holes are consistent with the number and positions of the inner ring oil filling pipes.

[0014] As a preferred embodiment, the outer ring oil filling pipe includes two separated sections, one section is an outer ring hollow tube, and the other section is an outer ring fuel nozzle. An outer ring spiral coil section is arranged in the middle section of the outer ring hollow tube. One end of the outer ring hollow tube is connected to the outer ring manifold via an outer ring joint, and the other end is detachably connected and connected to the outer ring fuel nozzle via an outer ring quick joint. One end of the outer ring hollow tube close to the outer ring fuel nozzle is connected to the outer ring oil filling ring via an outer ring quick joint. The outer ring fuel nozzle extends into the outer ring oil filling pipe mounting hole and is flush with the inner wall surface of the outer ring oil filling ring.

[0015] As a preferred embodiment, the inner ring oil filling pipe includes two separated sections, one section is the inner ring hollow tube, and the other section is the inner ring fuel nozzle. The middle section of the inner ring hollow tube is provided with an inner ring spiral coil section. One end of the inner ring hollow tube is connected to the inner ring oil filling cavity via an inner ring joint, and the other end is detachably connected and connected to the inner ring fuel nozzle via an inner ring quick connect joint. One end of the inner ring hollow tube close to the inner ring fuel nozzle is connected to the inner ring oil filling ring via an inner ring quick connect joint. The inner ring fuel nozzle extends into the inner ring oil filling pipe mounting hole and is flush with the outer wall surface of the inner ring oil filling ring.

[0016] As a preferred embodiment, the diameter of the outer ring oil injection pipe installation hole is 0.2-0.5 mm larger than the outer diameter of the outer ring oil injection pipe to ensure the installation of the outer ring oil injection pipe.

[0017] As a preferred embodiment, the outer ring manifold and the outer ring oil injection pipe are sealed and detachably connected by an outer ring joint.

[0018] As a preferred embodiment, the inner ring oil injection cavity and the inner ring oil injection pipe are sealed and detachably connected by an inner ring joint.

[0019] As a preferred embodiment, the diameter of the inner ring oil injection pipe installation hole is 0.2-0.5 mm larger than the outer diameter of the inner ring oil injection pipe to ensure the installation of the inner ring oil injection pipe.

[0020] As a preferred embodiment, the diameter of the outer ring oil injection pipe and / or the inner ring oil injection pipe is not greater than 6 mm.

[0021] The second object of the present invention is to provide a working method of a rotary detonation engine oil injection device with a detachable fuel injection hole, which is:

[0022] When the outer ring of the oil filling section is working, the fuel enters the outer ring manifold through the outer ring oil filling port, then enters the outer ring oil filling pipe through the outer ring joint, and then is injected into the oil filling section flow channel through the outer ring fuel nozzle and mixed with the incoming air. The fuel is injected from the outside to the center.

[0023] When the inner ring of the oil filling section is working, the fuel enters the inner ring oil filling cavity through the inner ring oil filling port, then enters the inner ring oil filling pipe through the inner ring joint, and then is sprayed into the oil filling section flow channel through the inner ring fuel nozzle and mixed with the air flow. The fuel is sprayed from the center to the outside.

[0024] Preferably, in the working method, since the outer ring fuel nozzle is detachably connected to the end face of the outer ring fuel injection pipe, when the outer ring fuel nozzle is blocked or needs to be changed in specifications, the outer ring fuel nozzle can be disassembled and replaced through the outer ring quick-connect joint;

[0025] And / or because the inner ring fuel nozzle is detachably connected to the end face of the inner ring oil filling ring, when the inner ring fuel nozzle is blocked or needs to be changed in specifications, the inner ring fuel nozzle can be disassembled and replaced through the inner ring quick connector.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention processes the fuel nozzle on the end face of the fuel injection pipe and uses a joint to achieve a detachable sealed connection with the other parts of the fuel injection device. Compared with directly processing the spray hole on the wall surface of the fuel injection section of the rotating detonation engine, it has the following advantages: first, since the fuel injection pipe is detachable, the processing technology is simpler when processing the fuel spray hole on the end face of the fuel injection pipe, and the processing difficulty and cost are relatively lower than directly processing the fuel spray hole on the annular inner (outer) wall surface of the fuel injection section; second, when the fuel spray hole is blocked, the blocked injection hole can be repaired. The oil pipe can be disassembled and unblocked, and the difficulty of unblocking it is greatly reduced. If the oil filling pipe is blocked and cannot be unblocked, it can also be replaced separately, so as to avoid the overall scrapping of the oil filling section and reduce the test risk; thirdly, because the oil filling pipe can be disassembled separately, when it is necessary to carry out experimental research on different apertures and quantities, it is only necessary to process oil filling pipes of different specifications, which greatly reduces the model processing cost; fourthly, the oil filling pipe can be disassembled separately, and the specifications and quantities of fuel nozzles can be flexibly arranged on the internal (external) components, such as arranging nozzles of different specifications along the circumference, which improves the flexibility of experimental research. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of the overall structure of a rotating detonation engine oil injection device with detachable fuel injection holes according to the present invention;

[0028] FIG2 is a schematic diagram of the installation of the oil injection device of the present invention;

[0029] FIG3 is a schematic diagram of the outer ring structure of the oil injection section of the present invention;

[0030] FIG4 is a schematic diagram of the structure of the outer ring oil injection pipe of the present invention;

[0031] FIG5 is a schematic diagram of the inner ring structure of the oil injection section of the present invention;

[0032] FIG. 6 is a schematic diagram of the inner ring oil injection pipe of the present invention.

[0033] Among them, 1-oil injection section outer ring, 2-oil injection section inner ring, 3-isolation section outer ring, 4-isolation section inner ring, 5-combustion chamber outer ring, 6-combustion chamber inner ring, 106-outer ring quick connector, 107-outer ring oil injection port, 108-outer ring manifold, 111-outer ring oil injection ring, 109-outer ring connector, 110-outer ring oil injection pipe, 112-outer ring oil injection pipe mounting hole, 102 is a spiral pipe section, 117-outer ring hollow pipe, 118-outer ring fuel nozzle; 202 is an inner ring spiral pipe section, 206-inner ring quick connector; 208-inner ring oil injection ring, 209-inner ring connector, 210-inner ring oil injection pipe, 212-inner ring oil injection pipe mounting hole, 213-inner ring oil injection port, 214 is the inner ring oil filling cavity, 217 is the inner ring hollow tube, 218 is the inner ring fuel nozzle. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0035] like Figure 1 As shown, a rotary detonation engine oil injection device with a detachable fuel injection hole, the oil injection device is located between the isolation section flow channel and the combustion chamber flow channel, the isolation section flow channel includes an isolation section outer ring 3, an isolation section inner ring 4 concentrically arranged inside the isolation section outer ring 3, and the combustion chamber flow channel includes a combustion chamber outer ring 5, and a combustion chamber inner ring 6 concentrically arranged inside the combustion chamber outer ring 5.

[0036] The oil injection device comprises, from the outside to the inside, an outer ring 1 of the oil injection section and an inner ring 2 of the oil injection section, the outer ring 1 of the oil injection section comprises, from the outside to the inside, an outer ring manifold 108 and an outer ring oil injection ring 111, which are arranged concentrically, and the inner ring 2 of the oil injection section comprises, from the outside to the inside, an inner ring oil injection ring 208 and an inner ring oil injection cavity 214, which are arranged concentrically.

[0037] The inner diameter of the outer ring 3 of the isolation section is consistent with the inner diameter of the outer ring oil injection ring 111.

[0038] The outer diameter of the inner ring 4 of the isolation section is consistent with the outer diameter of the inner ring oil injection ring 208.

[0039] The gap between the isolation section outer ring 3 and the isolation section inner ring 4 is the isolation section flow channel, the gap between the outer ring oil injection ring 111 and the inner ring oil injection ring 208 is the oil injection section flow channel, and the gap between the combustion chamber outer ring 5 and the combustion chamber inner ring 6 is the combustion chamber flow channel. The isolation section flow channel, the oil injection section flow channel, and the combustion chamber flow channel are sequentially connected and form an engine annular gap channel for supersonic air flow. The central axis of the oil injection section outer ring 1 and the oil injection section inner ring 2 coincides with the central axis of the engine annular gap channel.

[0040] The outer ring manifold 108 is a circular pipe; the outer ring oil filling port 107 is located on the surface of the outer ring manifold 108 and is connected to the inner cavity of the outer ring manifold 108, the outer ring oil filling port 107 is used to input fuel under pressure through an external oil pipe via an oil pump, and the outer ring manifold 108 is used to achieve uniform supply of fuel to the outer ring oil filling pipe 110, the outer ring oil filling pipe 110 is located between the outer ring manifold 108 and the outer ring oil filling ring 111, and the outer ring oil filling pipe 110 is evenly distributed in the circumferential direction of the outer ring manifold 108 and the outer ring oil filling ring 111, and the outer ring oil filling pipe The two ends of 110 are connected to the outer ring manifold 108 and the outer ring oil injection ring 111 respectively. The inner wall of the outer ring oil injection ring 111 close to the center of the circle is uniformly distributed with outer ring oil injection pipe mounting holes 112 along the circumferential direction. The outer ring oil injection pipe mounting holes 112 are through holes that penetrate the inner and outer walls of the outer ring oil injection ring 111. The outer ring oil injection pipe mounting holes 112 are connected to the outer ring oil injection pipe 110. One end of the outer ring oil injection pipe 110 extends into the inner part of the outer ring oil injection pipe mounting holes 112. The number and position of the outer ring oil injection pipe mounting holes 112 are consistent with the number and position of the outer ring oil injection pipe 110.

[0041] The inner ring 2 of the oil filling section includes, from the inside to the outside, a concentrically arranged inner ring oil filling cavity 214 and an inner ring oil filling ring 208, wherein the inner ring oil filling cavity 214 is a circular sealed cavity, wherein the inner ring oil filling port 213 is located on the surface of the inner ring oil filling cavity 214 and is connected to the inner cavity of the inner ring oil filling cavity 214, the inner ring oil filling port 213 is used to pressurize the input of fuel through an external oil pipe through an oil pump, the inner ring oil filling pipe 210 is used to realize the uniform supply of fuel to the inner ring oil filling ring 208, the inner ring oil filling pipe 210 is located between the inner ring oil filling cavity 214 and the inner ring oil filling ring 208, and the inner ring oil filling pipe 210 is located between the inner ring oil filling cavity 214 and the inner ring oil filling ring 208, and the inner ring oil filling pipe 210 is located between the inner ring oil filling cavity 214 and the inner ring oil filling ring 208. The inner ring oil injection ring 208 is evenly distributed in the circumferential direction, and the two ends of the inner ring oil injection tube 210 are respectively connected to the inner ring oil injection cavity 214 and the inner ring oil injection ring 208, and the outer wall of the inner ring oil injection ring 208 away from the center of the circle is evenly distributed with inner ring oil injection tube mounting holes 212 along the circumferential direction. The inner ring oil injection tube mounting holes 212 are through holes that penetrate the inner and outer walls of the inner ring oil injection ring 208. The inner ring oil injection tube mounting holes 212 are connected to the inner ring oil injection tube 210, and one end of the inner ring oil injection tube 210 extends into the inner ring oil injection tube mounting hole 212. The number and position of the inner ring oil injection tube mounting holes 212 are consistent with the number and position of the inner ring oil injection tube 210.

[0042] Preferably, the outer ring oil filling pipe 110 includes two separated sections, one section is an outer ring hollow tube 117, and the other section is an outer ring fuel nozzle 118. The middle section of the outer ring hollow tube 117 is provided with an outer ring spiral coil section 102. One end of the outer ring hollow tube 117 is connected to the outer ring manifold 108 via an outer ring joint 109, and the other end is detachably connected and connected to the outer ring fuel nozzle 118 via an outer ring quick joint 106. One end of the outer ring hollow tube 117 close to the outer ring fuel nozzle 118 is connected to the outer ring oil filling ring 111 via the outer ring quick joint 106. The outer ring fuel nozzle 118 extends into the outer ring oil filling pipe mounting hole 112 and is flush with the inner wall surface of the outer ring oil filling ring 111.

[0043] Preferably, the inner ring oil filling pipe 210 includes two separated sections, one section is the inner ring hollow tube 217, and the other section is the inner ring fuel nozzle 218. The middle section of the inner ring hollow tube 217 is provided with an inner ring spiral coil section 202. One end of the inner ring hollow tube 217 is connected to the inner ring oil filling cavity 214 via an inner ring joint 209, and the other end is detachably connected and connected to the inner ring fuel nozzle 218 via an inner ring quick connector 206. One end of the inner ring hollow tube 217 close to the inner ring fuel nozzle 218 is connected to the inner ring oil filling ring 208 via the inner ring quick connector 206. The inner ring fuel nozzle 218 extends into the inner ring oil filling pipe mounting hole 212 and is flush with the outer wall of the inner ring oil filling ring 208.

[0044] Preferably, the diameter of the outer ring oil injection pipe installation hole 112 is 0.2-0.5 mm larger than the outer diameter of the outer ring oil injection pipe 110 to ensure the installation of the outer ring oil injection pipe 110 .

[0045] Preferably, the outer ring manifold 108 and the outer ring oil injection pipe 110 are sealed and detachably connected by an outer ring joint 109 .

[0046] Preferably, the inner ring oil filling cavity 214 and the inner ring oil filling pipe 210 are sealed and detachably connected by an inner ring joint 209 .

[0047] Preferably, the diameter of the inner ring oil injection tube installation hole 212 is 0.2-0.5 mm larger than the outer diameter of the inner ring oil injection tube 210 to ensure the installation of the inner ring oil injection tube 210 .

[0048] Preferably, the diameter of the outer ring oil injection pipe 110 and / or the inner ring oil injection pipe 210 is not greater than 6 mm.

[0049] This embodiment also provides a working method of the rotary detonation engine oil injection device with detachable fuel injection holes, which is:

[0050] When the outer ring 1 of the oil filling section is working, the fuel enters the outer ring manifold 108 through the outer ring oil filling port 107, then enters the outer ring oil filling pipe 110 through the outer ring joint 109, and then is injected into the oil filling section flow channel through the outer ring fuel nozzle 118 and mixed with the incoming air. The fuel is injected from the outside to the center.

[0051] At the same time, when the inner ring 2 of the oil filling section is working, the fuel enters the inner ring oil filling cavity 214 through the inner ring oil filling port 213, then enters the inner ring oil filling pipe 210 through the inner ring joint 209, and then is injected into the oil filling section flow channel through the inner ring fuel nozzle 218 and mixed with the air flow, and the fuel is injected from the center to the outside;

[0052] Subsequently, the fuel / air is mixed and enters the combustion chamber flow channel formed between the combustion chamber outer ring 5 and the combustion chamber inner ring 6, the detonator is detonated and forms a rotating detonation combustion, the engine works and generates thrust.

[0053] Since the outer ring fuel nozzle 118 is detachably connected to the end surface of the outer ring fuel injection pipe 110, when the outer ring fuel nozzle 118 is blocked or needs to be changed, the outer ring fuel nozzle 118 can be disassembled and replaced through the outer ring quick connector 106;

[0054] And / or because the inner ring fuel nozzle 218 is detachably connected to the end surface of the inner ring oil filling ring 208, when the inner ring fuel nozzle 218 is blocked or needs to be changed in specifications, the inner ring fuel nozzle 218 can be removed and replaced through the inner ring quick connector 206.

[0055] like Figure 1 As shown, the outer ring 1 of the oil injection section and the inner ring 2 of the oil injection section are independent of each other and used in coordination.

[0056] Figure 2 A schematic diagram of the installation of the oil injection device in a rotating detonation ramjet engine is further given. The gap between the isolation segment outer ring 3 and the isolation segment inner ring 4 is the isolation segment flow channel. The isolation segment annular flow channel is used for supersonic air flow, and the inner diameter of the isolation segment outer ring 3 is consistent with the inner diameter of the outer ring oil injection ring 111, and the outer diameter of the isolation segment inner ring 4 is consistent with the outer diameter of the inner ring oil injection ring 208, thereby keeping the flow area of ​​the annular flow channel along the flow direction unchanged.

[0057] Downstream of the oil injection section, the combustion chamber outer ring 5 and the combustion chamber inner ring 6 are connected respectively to form a rotating detonation ramjet engine flow channel as a whole.

[0058] Figure 3 The detailed structure of the outer ring of the oil injection section is given.

[0059] Figure 5 The detailed structure of the inner ring of the oil injection section is given, and its design concept is consistent with that of the outer ring oil injection section.

[0060] Figure 4 and Figure 6 The detailed structure of the oil filling pipe is given. The inside of the pipe is a hollow structure to facilitate the passage of fuel. The diameter of the oil filling pipe should not be too thick (pipe diameter ≯ 6mm), and a spiral coil section is provided to facilitate the assembly and disassembly of the oil filling pipe.

[0061] When some fuel spray holes are clogged due to impurities in the fuel and other problems, the fuel injection pipe can be disassembled and cleaned by removing the quick-connect joint. If the spray hole can be unblocked, the fuel injection pipe can be reinstalled. If the spray hole is difficult to unblock, the clogged fuel injection pipe can be replaced and installed to ensure the normal progress of the experiment without replacing the entire fuel injection device, thereby reducing the experimental risk and cost.

[0062] When it is necessary to conduct research on different numbers of nozzles, the number of nozzles can be quickly adjusted by removing part of the oil filling pipes and installing plugs. When it is necessary to conduct research on different nozzle diameters, it is only necessary to partially or completely replace the oil filling pipes of different specifications to achieve rapid adjustment and flexible arrangement of the fuel nozzle specifications. The replacement process is quick and efficient, and since there is no need to replace the entire oil filling device, the experimental cost is greatly reduced.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A rotating detonation engine oil injection device with detachable fuel injection holes, characterized in that: The oil injection device is located between the isolation section flow channel and the combustion chamber flow channel. The isolation section flow channel includes an isolation section outer ring (3) and an isolation section inner ring (4) arranged concentrically inside the isolation section outer ring (3). The combustion chamber flow channel includes a combustion chamber outer ring (5) and a combustion chamber inner ring (6) arranged concentrically inside the combustion chamber outer ring (5). The oil injection device comprises, from the outside to the inside, an oil injection section outer ring (1) and an oil injection section inner ring (2) which are arranged concentrically, the oil injection section outer ring (1) comprising, from the outside to the inside, an outer ring manifold (108) and an outer ring oil injection ring (111) which are arranged concentrically, and the oil injection section inner ring (2) comprising, from the outside to the inside, an inner ring oil injection ring (208) and an inner ring oil injection cavity (214) which are arranged concentrically, The inner diameter of the outer ring (3) of the isolation section is consistent with the inner diameter of the outer ring oil injection ring (111). The outer diameter of the inner ring (4) of the isolation section is consistent with the outer diameter of the inner ring oil injection ring (208). The gap between the isolation section outer ring (3) and the isolation section inner ring (4) is the isolation section flow channel, the gap between the outer ring oil injection ring (111) and the inner ring oil injection ring (208) is the oil injection section flow channel, and the gap between the combustion chamber outer ring (5) and the combustion chamber inner ring (6) is the combustion chamber flow channel. The isolation section flow channel, the oil injection section flow channel, and the combustion chamber flow channel are sequentially connected to form an engine annular gap channel for supersonic air flow. The central axes of the oil injection section outer ring (1) and the oil injection section inner ring (2) coincide with the central axis of the engine annular gap channel. The outer ring manifold (108) is a circular pipe; the outer ring oil injection port (107) is located on the surface of the outer ring manifold (108) and is connected to the inner cavity of the outer ring manifold (108); the outer ring oil injection port (107) is used to input fuel through an external oil pipe under pressure via an oil pump; the outer ring manifold (108) is used to evenly supply fuel to the outer ring oil injection pipe (110); the outer ring oil injection pipe (110) is located between the outer ring manifold (108) and the outer ring oil injection ring (111); and the outer ring oil injection pipe (110) is evenly distributed in the circumferential direction of the outer ring manifold (108) and the outer ring oil injection ring (111); and the outer ring oil injection pipe (110) is uniform ... oil injection pipe (110); and the outer ring oil injection pipe (110) is uniformly distributed in the circumferential direction of the outer ring oil The two ends of (110) are respectively connected to the outer ring manifold (108) and the outer ring oil injection ring (111); the inner wall of the outer ring oil injection ring (111) close to the center of the circle is uniformly distributed with outer ring oil injection pipe mounting holes (112) along the circumferential direction; the outer ring oil injection pipe mounting holes (112) are through holes that penetrate the inner wall and the outer wall of the outer ring oil injection ring (111); the outer ring oil injection pipe mounting holes (112) are connected to the outer ring oil injection pipe (110); one end of the outer ring oil injection pipe (110) extends into the outer ring oil injection pipe mounting holes (112); the number and position of the outer ring oil injection pipe mounting holes (112) are consistent with the number and position of the outer ring oil injection pipe (110); The inner ring (2) of the oil injection section comprises, from the inside to the outside, an inner ring oil injection cavity (214) and an inner ring oil injection ring (208) which are arranged concentrically. The inner ring oil injection cavity (214) is a circular sealed cavity, wherein the inner ring oil injection port (213) is located on the surface of the inner ring oil injection cavity (214) and is connected to the inner cavity of the inner ring oil injection cavity (214). The inner ring oil injection port (213) is used to input fuel under pressure through an external oil pipe via an oil pump. The inner ring oil injection pipe (210) is used to achieve uniform supply of fuel to the inner ring oil injection ring (208). The inner ring oil injection pipe (210) is located between the inner ring oil injection cavity (214) and the inner ring oil injection ring (208), and the inner ring oil injection pipe (210) is located between the inner ring oil injection cavity (214) and the inner ring oil injection ring (208). The inner ring oil injection ring (208) is evenly distributed in the circumferential direction, and the two ends of the inner ring oil injection pipe (210) are respectively connected to the inner ring oil injection cavity (214) and the inner ring oil injection ring (208). The outer wall of the inner ring oil injection ring (208) away from the center of the circle is evenly distributed with inner ring oil injection pipe mounting holes (212) along the circumferential direction. The inner ring oil injection pipe mounting holes (212) are through holes that penetrate the inner wall and the outer wall of the inner ring oil injection ring (208). The inner ring oil injection pipe mounting holes (212) are connected to the inner ring oil injection pipe (210). One end of the inner ring oil injection pipe (210) extends into the inner ring oil injection pipe mounting holes (212). The number and position of the inner ring oil injection pipe mounting holes (212) are consistent with the number and position of the inner ring oil injection pipe (210).

2. A rotating detonation engine oil injection device with detachable fuel injection holes according to claim 1, characterized in that: The outer ring oil injection pipe (110) comprises two sections separated from each other, one section being an outer ring hollow pipe (117) and the other section being an outer ring fuel nozzle (118). An outer ring spiral coil section (102) is arranged in the middle section of the outer ring hollow pipe (117). One end of the outer ring hollow pipe (117) is connected and communicated with the outer ring manifold (108) via an outer ring joint (109), and the other end is detachably connected and communicated with the outer ring fuel nozzle (118) via an outer ring quick joint (106). An end of the outer ring hollow pipe (117) close to the outer ring fuel nozzle (118) is connected and communicated with the outer ring oil injection ring (111) via the outer ring quick joint (106). The outer ring fuel nozzle (118) extends into the outer ring oil injection pipe mounting hole (112) and is flush with the inner wall surface of the outer ring oil injection ring (111).

3. The rotating detonation engine oil injection device with detachable fuel injection hole according to claim 1, characterized in that: The inner ring oil injection pipe (210) comprises two sections separated from each other, one section being an inner ring hollow pipe (217) and the other section being an inner ring fuel nozzle (218). An inner ring spiral coil section (202) is arranged in the middle section of the inner ring hollow pipe (217). One end of the inner ring hollow pipe (217) is connected and communicated with the inner ring oil injection cavity (214) via an inner ring joint (209), and the other end is detachably connected and communicated with the inner ring fuel nozzle (218) via an inner ring quick joint (206). An end of the inner ring hollow pipe (217) close to the inner ring fuel nozzle (218) is connected and communicated with the inner ring oil injection ring (208) via the inner ring quick joint (206). The inner ring fuel nozzle (218) extends into the inner ring oil injection pipe mounting hole (212) and is flush with the outer wall surface of the inner ring oil injection ring (208).

4. A rotating detonation engine oil injection device with detachable fuel injection holes according to claim 1, characterized in that: The diameter of the outer ring oil injection pipe installation hole (112) is 0.2-0.5 mm larger than the outer diameter of the outer ring oil injection pipe (110) to ensure that the outer ring oil injection pipe (110) can be installed.

5. The rotating detonation engine oil injection device with detachable fuel injection hole according to claim 1, characterized in that: The outer ring manifold (108) and the outer ring oil injection pipe (110) are sealed and detachably connected by an outer ring joint (109).

6. The rotating detonation engine oil injection device with detachable fuel injection holes according to claim 1, characterized in that: The inner ring oil injection cavity (214) and the inner ring oil injection pipe (210) are sealed and detachably connected by an inner ring joint (209).

7. The rotating detonation engine oil injection device with detachable fuel injection holes according to claim 1, characterized in that: The diameter of the inner ring oil injection pipe installation hole (212) is 0.2-0.5 mm larger than the outer diameter of the inner ring oil injection pipe (210) to ensure that the inner ring oil injection pipe (210) can be installed.

8. The rotating detonation engine oil injection device with detachable fuel injection holes according to claim 1, characterized in that: The diameter of the outer ring oil injection pipe (110) and / or the inner ring oil injection pipe (210) is not greater than 6 mm.

9. The working method of the rotating detonation engine oil injection device with detachable fuel injection holes according to any one of claims 1 to 8, characterized in that: When the outer ring (1) of the oil injection section is in operation, the fuel enters the outer ring manifold (108) through the outer ring oil injection port (107), then enters the outer ring oil injection pipe (110) through the outer ring joint (109), and then is injected into the oil injection section flow channel through the outer ring fuel injection port (118) and mixed with the incoming air. The fuel is injected from the outside to the center. At the same time, when the inner ring (2) of the oil injection section is working, the fuel enters the inner ring oil injection cavity (214) through the inner ring oil injection port (213), then enters the inner ring oil injection pipe (210) through the inner ring joint (209), then is injected into the oil injection section flow channel through the inner ring fuel nozzle (218) and mixed with the incoming air flow, and the fuel is injected from the center to the outside; Subsequently, the fuel / air is mixed and enters the combustion chamber flow channel formed between the combustion chamber outer ring (5) and the combustion chamber inner ring (6), the detonator is detonated and a rotating detonation combustion is formed, and the engine works and generates thrust.

10. The working method according to claim 9, characterized in that: The outer ring fuel nozzle (118) is detachably connected to the end surface of the outer ring fuel injection pipe (110); when the outer ring fuel nozzle (118) is blocked or needs to be replaced, the outer ring fuel nozzle (118) can be disassembled and replaced through the outer ring quick-connect joint (106); And / or because the inner ring fuel nozzle (218) is detachably connected to the end surface of the inner ring oil injection ring (208), when the inner ring fuel nozzle (218) is blocked or needs to be replaced, the inner ring fuel nozzle (218) can be disassembled and replaced through the inner ring quick connector (206).

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