Ignition device, ignition system, cross-media engine and method of ignition thereof

Abstract

The application belongs to the technical field of engines, and particularly relates to an ignition device, an ignition system, a cross-medium engine and an ignition method thereof, wherein the ignition device comprises a shell I, an oxygen-rich propellant, an igniter and a partition plate; the shell I is provided with a cavity I and a nozzle I connected with the cavity I; the oxygen-rich propellant and the igniter are arranged in the cavity I; the partition plate is arranged at the nozzle I, used for plugging the nozzle I before the ignition device is ignited, and broken to release the nozzle I after the ignition device is ignited; the ignition device provided by the application is suitable for the ignition work of the cross-medium engine; there are liquid or gas in the combustion chamber of the cross-medium engine when the cross-medium engine flies in different media; the partition plate arranged on the ignition device can isolate the oxygen-rich propellant and the igniter from the medium before the ignition device is ignited, so that the ignition can be performed at any time and the success rate of the ignition is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engines, and particularly relates to an ignition device, an ignition system, a cross-medium engine and an ignition method thereof. BACKGROUND

[0002] A cross-medium aircraft is a new type of aircraft that can both dive underwater and fly in the air, and has the advantages of high speed and strong maneuverability of traditional aircraft and strong concealment of underwater submersible vehicles. The power system of existing high-speed cross-medium aircraft generally adopts a combined power system scheme, that is, a solid rocket booster or a turbojet engine is used as power to deliver to a designated position in the air, and a propeller or a rocket propulsion is used after entering the water. This scheme requires the installation of two sets of power devices in the aircraft, greatly increasing the complexity of the system.

[0003] A super-high-speed cross-medium aircraft with a solid fuel ramjet engine as a power system can realize supersonic cruise in the air and underwater super-high-speed navigation in water ram mode, and has the characteristics of small size, high speed, strong concealment and strong maneuverability, and has broad application prospects in future military fields such as anti-ship operations and civil fields such as ocean exploration. The scheme of a cross-medium ramjet engine using traditional solid fuel-rich propellant as an energy source has the advantages of reliable ignition and strong working stability, but cannot be repeatedly ignited, and the flow regulation range is limited, which is difficult to adapt to the demand of repeated water entry of the cross-medium aircraft.

[0004] A cross-medium ramjet engine with metal powder fuel as an energy source has the advantages of wide flow regulation range and repeatable start, and is an ideal power device for a cross-medium aircraft. However, due to the weak oxidation ability of liquid water in the mode conversion process and in water ram mode, the powder fuel is difficult to achieve rapid and stable ignition. The Chinese invention patent "CN111749814A Cross-medium dual-mode ramjet engine based on metal fuel and control method" adopts a method of carrying pre-oxidizing agent to provide additional oxidizing agent for rapid ignition of metal fuel, but the liquid oxidizing agent used has a large volume, and a supporting supply pump, valve and nozzle are required, which increases the complexity of the engine and reduces the volume specific impulse of the engine.

[0005] The Chinese invention patent "CN202010254465 Reusable igniter for rocket engine" uses a repeatable ignition electric control solid propellant as an engine igniter, but requires the aircraft to carry a large volume of power supply, which cannot meet the strong volume constraint requirement of the cross-medium aircraft. SUMMARY

[0006] The technical problem solved by the present application is to provide a firing device, a firing system, a cross-medium engine and a firing method for effectively solving the problem of difficult repeated ignition of a cross-medium powder fuel ramjet engine under water.

[0007] The present application provides a firing device, comprising a shell I, an oxygen-rich propellant, a igniter and a partition plate.

[0008] The shell I has a cavity I and a nozzle I communicating with the cavity I.

[0009] The oxygen-rich propellant and the igniter are arranged in the cavity I.

[0010] The partition plate is arranged at the nozzle I, used for plugging the nozzle I before the firing device is ignited, and broken to release the nozzle I after the firing device is ignited.

[0011] Further, the partition plate is an arc-shaped plate, and the center of the arc-shaped plate is located on one side of the cavity I.

[0012] Further, a flange plate is arranged at the nozzle I, and the convex surface of the partition plate abuts against the opening I of the flange plate, and a partition plate limiting piece is further arranged in the cavity I, and the end surface of the partition plate abuts against the partition plate limiting piece.

[0013] Further, the partition plate limiting piece comprises a channel and a limiting taper hole communicating with each other in sequence, the small end of the limiting taper hole communicates with the channel, and the large end communicates with the nozzle I, and the end surface of the partition plate abuts against the taper surface of the limiting taper hole.

[0014] Further, the flange plate is screwed on the nozzle I.

[0015] Further, the partition plate limiting piece is made of a heat insulation material.

[0016] Further, the shell I comprises a main shell and a cover plate, the main shell is provided with a cavity, one end of the cavity is provided with an opening II, the cover plate is sealingly installed on the opening II, and the cavity and the cover plate form the cavity I, and the nozzle I is arranged on the cover plate.

[0017] The other end of the partition plate limiting piece abuts against the connection between the cover plate and the opening II.

[0018] The present application further provides a firing system, comprising a shell II and a plurality of firing devices.

[0019] The shell II has a cavity II and a nozzle II communicating with the cavity II, and the plurality of firing devices are arranged in the cavity II, and the nozzles I of the firing devices face the nozzle II.

[0020] The plurality of firing devices can be independently controlled to ignite.

[0021] The application also provides a cross-medium engine, comprising a combustion chamber, wherein an ignition system is arranged at one end of the combustion chamber, a nozzle is arranged at the other end of the combustion chamber, a fuel input pipe is arranged at one side of the combustion chamber close to the ignition system, and a gas / liquid inlet channel is arranged between the fuel input pipe and the nozzle.

[0022] The application also provides an ignition method of the cross-medium engine, using the cross-medium engine, and comprising the following steps:

[0023] Single ignition: an ignition signal is sent to the igniter of one of the ignition devices, the igniter ignites the oxygen-rich propellant after receiving the ignition signal, generates primary gas containing a large amount of oxidizing gas, and causes the pressure inside the cavity I to rise, the pressure breaks the partition plate and the primary gas is ejected from the nozzle I, and then the oxygen-rich propellant continues to burn stably, continuously generates high-temperature and high-oxidizing primary gas from the nozzle II, and mixes with the fuel injected into the combustion chamber by the fuel input pipe and reacts to release heat, thereby completing the ignition of the fuel;

[0024] After ignition, the fuel and the gas / liquid injected into the combustion chamber from the gas / liquid inlet channel further react to generate combustion products, which are accelerated and discharged from the nozzle to generate thrust;

[0025] A plurality of ignition devices can work in sequence to complete multiple ignitions of the cross-medium engine.

[0026] The application has the following beneficial effects:

[0027] The ignition device provided by the application is suitable for the ignition work of the cross-medium engine, and there are liquid or gas in the combustion chamber of the cross-medium engine when it flies in different mediums. The application arranges the partition plate on the ignition device, which can isolate the oxygen-rich propellant and the igniter from the medium before the ignition device ignites, thereby realizing ignition at any time and improving the success rate of ignition.

[0028] The ignition system is assembled by a plurality of ignition devices in the shell II with the cavity II and the nozzle II, and has the advantages of simple and reliable structure, single or simultaneous ignition, multiple ignition when single ignition is performed, and no influence between the ignition devices during ignition due to the partition plate arranged on each ignition device

[0029] The cross-medium engine, the powder supply device sprays the powder fuel from the fuel input pipe into the combustion chamber, and when one of the ignition devices in the ignition system receives the ignition signal, the corresponding igniter is started and ignited to produce a large amount of high-temperature and high-oxidizing primary gas, which is then sprayed out by the nozzle II and mixed with the powder fuel in the combustion chamber to release heat through chemical reaction, thereby completing the ignition of the powder fuel. Subsequently, the powder fuel and the gas / liquid sprayed by the gas / liquid inlet channel further react to generate combustion products, which are accelerated by the nozzle to be discharged and generate thrust. When the cross-medium engine needs multiple ignitions when repeatedly entering water or performing maneuvers, the igniters in the ignition system can work in turn to complete multiple ignitions of the engine. Due to the effect of the partition plate, the working of a certain ignition device in the ignition system or the working of the engine combustion chamber will not affect the remaining unignited ignition devices. The problem of difficult repeated ignition of the cross-medium powder fuel ramjet engine underwater is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0030] FIG. 1 is a structural schematic diagram of the ignition device in the present application; Figure 1 FIG. 1 is a structural schematic diagram of the ignition device in the present application;

[0031] FIG. 1 is a structural schematic diagram of the ignition device in the present application; Figure 2 FIG. 1 is a structural schematic diagram of the ignition device in the present application;

[0032] FIG. 1 is a structural schematic diagram of the ignition device in the present application; Figure 3 FIG. 1 is a structural schematic diagram of the ignition device in the present application;

[0033] FIG. 1 is a structural schematic diagram of the ignition device in the present application; Figure 4 FIG. 1 is a structural schematic diagram of the ignition device in the present application;

[0034] In the figure, 1-ignition device; 11-housing I; 111-cavity I; 112-nozzle I; 113-main housing; 1131-cavity; 1132-opening II; 114-cover plate; 12-oxygen-rich propellant; 13-igniter; 14-partition plate; 15-partition plate limiting member; 151-channel; 152-limiting cone hole; 16-flange; 17-sealing ring; 2-housing II; 21-cavity II; 22-nozzle II; 3-combustion chamber; 4-nozzle; 5-fuel input pipe; 6-gas / liquid inlet channel; 7-powder fuel. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications will also change accordingly.

[0037] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0038] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection, or physical connection, or wireless communication connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0040] Reference is made to the accompanying drawings Figure 1 The ignition device 1 of the present application comprises a shell 111, an oxygen-rich propellant 12, an igniter 13 and a partition 14.

[0041] The shell 111 has a cavity 1111 and a nozzle 1112 communicating with the cavity 1111, the cavity 1111 is used to accommodate the oxygen-rich propellant 12 and the igniter 13, and provides a closed space for the combustion of the oxygen-rich propellant 12, and the nozzle 1112 is used to eject the primary gas generated by the oxygen-rich propellant 12;

[0042] The oxygen-rich propellant 12 and the igniter 13 are arranged in the cavity 1111, and in a preferred embodiment, the oxygen-rich propellant 12 is arranged on the side of the cavity 1111 away from the nozzle 1112, and the igniter 13 is arranged on the side of the oxygen-rich propellant 12 close to the nozzle 1112;

[0043] The partition plate 14 is arranged at the nozzle 112, and is used for blocking the nozzle 112 before the ignition device 1 is ignited, so that foreign matters in the outside can be prevented from entering the cavity 111 and affecting the use of the oxygen-rich propellant 12 and the igniter 13, especially when the engine works underwater and the combustion chamber 3 is filled with water, water can be prevented from entering the cavity 111 and causing the ignition device 1 to fail, and the partition plate 14 is broken and released from the nozzle 112 after the ignition device 1 is ignited, that is, the partition plate 14 can be broken due to the pressure increase in the cavity 111 after the ignition device 1 is ignited, so that the primary gas generated by igniting the oxygen-rich propellant 12 can be sprayed out of the nozzle 112 into the combustion chamber 3 to ignite the gas and complete the ignition.

[0044] The ignition device 1 provided by the application is suitable for the ignition work of the cross-medium engine, and there are liquid or gas in the combustion chamber 3 of the cross-medium engine when the combustion chamber 3 flies in different mediums, the partition plate arranged on the ignition device 1 can isolate the oxygen-rich propellant 12 and the igniter 13 from the medium before the ignition device 1 is ignited, so that the ignition can be performed at any time and the success rate of the ignition is improved.

[0045] In one embodiment, the partition plate 14 is an arc-shaped plate, and the center of the arc-shaped plate is located on one side of the cavity 111, that is, the convex surface of the partition plate 14 faces the nozzle 112, in this embodiment, the partition plate 14 is an arc-shaped plate, and has the directional blasting capacity, that is, when the pressure on the concave surface of the partition plate 14 reaches the rated pressure, the partition plate 14 can be broken rapidly, and when the pressure on the convex surface of the partition plate 14 is less than the allowable pressure, the partition plate 14 will not be broken, wherein the allowable pressure is greater than the rated pressure, so that the sealing stability of the partition plate 14 can be greatly improved. In addition, the partition plate 14 is an arc-shaped plate, the pressure in the cavity 111 increases after the ignition device 1 is ignited, the concave surface of the partition plate 14 is broken under the action of the pressure load and is sprayed out of the nozzle 112 together with the primary gas, and compared with the straight plate structure, the fragments broken in the middle part of the arc-shaped plate are sprayed out of the nozzle 112 first, and then the fragments broken in the outer part of the arc-shaped plate are sprayed out of the nozzle 112, so that the fragments pass through the nozzle 112 in sequence rather than synchronously, the gas passing rate at the position of the nozzle 112 can be improved, and then the ignition effect can be ensured.

[0046] In one of the embodiments, the nozzle 112 is provided with a flange 16, and the convex surface of the partition plate 14 abuts the opening I of the flange 16, wherein the opening I of the flange 16 is a circular opening, and the area of the convex surface of the partition plate 14 is larger than the size of the circular opening, so that the partition plate 14 can block the nozzle 112 by blocking the opening I of the flange 16. In this embodiment, the flange 16 is arranged on the nozzle 112, so that the sealing of the partition plate 14 and the nozzle 112 can be realized by the flange 16, thereby reducing the requirement for the material of the shell 111 and reducing the cost. The cavity 111 is further provided with a partition plate limiting member 15, and the end surface of the partition plate 14 abuts the partition plate limiting member 15. At this time, the locking of the partition plate 14 is completed by the position limitation in two directions of the end surface and the convex surface, so that the installation of the partition plate 14 can be simplified and the stability of the installation can be ensured.

[0047] In one of the embodiments, the partition plate limiting member 15 comprises a channel 151 and a limiting tapered hole 152 which are sequentially communicated, the small end of the limiting tapered hole 152 is communicated with the channel 151, and the large end is communicated with the nozzle 112, and the end surface of the partition plate 14 abuts the tapered surface of the limiting tapered hole 152, so that the fit degree of the end surface of the partition plate 14 and the partition plate limiting member 15 can be ensured. On the one hand, the limiting stability can be improved, so that the allowable pressure of the convex surface of the partition plate 14 can be improved, and on the other hand, the gas pressure conduction inside the cavity 111 can be guided, so that the breaking efficiency and working reliability of the partition plate 14 can be improved.

[0048] In one of the embodiments, the flange 16 is screwed on the nozzle 112, so that the limiting of the partition plate 14 can be completed by adjusting the axial distance of the flange 16 on the nozzle 112, thereby realizing the installation and fixation of the partition plate 14.

[0049] In one of the embodiments, the partition plate limiting member 15 is made of heat insulation material, which can be bakelite or high-silica, so that the ablation of the high-temperature gas generated in the combustion process of the oxygen-rich propellant 12 to the main shell 113 and the cover plate 114 can be effectively prevented, thereby ensuring the stability and reliability of the ignition device.

[0050] In one of the embodiments, the shell 111 comprises a main shell 113 and a cover plate 114, the main shell 113 is provided with a cavity 1131, one end of the cavity 1131 is provided with an opening 112, the cover plate 114 is sealingly installed on the opening 112, and the cavity 1131 is formed by the cover plate 114 and the cavity 1131, and the nozzle 112 is arranged on the cover plate 114. In this way, the disassembly and assembly of the oxygen-rich propellant 12, the igniter 13, the partition plate limiting member 15 and the partition plate 14 can be facilitated, and the production cost can be reduced. The sealing ring 17 is further arranged between the cover plate 114 and the main shell 113.

[0051] The other end of the partition limiting piece 15 abuts against the joint of the cover plate 114 and the opening II 1132, and the partition limiting piece 15 can further improve the sealing performance of the cover plate 114 and the main shell 113.

[0052] Reference is made to the accompanying drawings Figure 2 - the accompanying drawings Figure 3 The application further provides an ignition system comprising a shell II 2 and a plurality of ignition devices 1.

[0053] The shell II 2 has a cavity II 21 and a nozzle II 222 communicating with the cavity II 221, and the plurality of ignition devices 1 are arranged in the cavity II 221, and the nozzle I 112 of the ignition device 1 faces the nozzle II 222.

[0054] The plurality of ignition devices 1 can be independently controlled.

[0055] The ignition system is formed by assembling a plurality of ignition devices 1 in a shell II 2 having a cavity II 221 and a nozzle II 222, and has simple and reliable structure, and can realize single or simultaneous ignition, and can realize multiple ignition when single ignition is performed at intervals, and since each ignition device 1 is provided with a partition 14, the ignition devices do not affect each other during ignition, and in addition, the plurality of ignition devices 1 can be independently controlled, and the igniters 13 in the plurality of ignition devices 1 can be connected in wired parallel connection or connected in wireless communication.

[0056] Reference is made to the accompanying drawings Figure 4 The application further provides a cross-medium engine which can work across gas and liquid mediums, such as air and water, and comprises a combustion chamber 3, the combustion chamber 3 is provided with an ignition system at one end and a nozzle 4 at the other end, the combustion chamber 3 is provided with a fuel input pipe 5 near the ignition system, the fuel input pipe 5 is used for injecting powder fuel 7 into the combustion chamber 3, and the combustion chamber 3 is further provided with a gas / liquid inlet channel 6 between the fuel input pipe 5 and the nozzle 4, which is used for injecting gas / liquid, such as air / water, into the combustion chamber 3.

[0057] The cross-medium engine, the powder supply device sprays the powder fuel 7 from the fuel input pipe 5 into the combustion chamber 3, wherein the powder supply device has a flow regulating function, which can regulate the flow of the powder fuel 7 sprayed from the fuel input pipe 5 into the combustion chamber 3, so that the flow regulating range of the solid fuel-rich propellant is very large, and is more suitable for the use of the cross-medium engine; when one of the ignition devices 1 in the ignition system receives an ignition signal, the corresponding igniter 13 is started and ignited to produce a large amount of high-temperature and high-oxidizing primary gas, which is then sprayed out by the nozzle II 22, mixed with the powder fuel 7 in the combustion chamber 3 and chemically reacted to release heat, so as to complete the ignition of the powder fuel 7. Subsequently, the powder fuel 7 and the gas / liquid sprayed by the gas / liquid inlet channel 6 are further reacted to generate combustion products which are accelerated by the nozzle 4 and discharged to generate thrust.

[0058] When the cross-medium engine repeatedly enters water or needs multiple ignitions for maneuvering, the igniters 13 in the ignition system can work in sequence to complete multiple ignitions of the engine. Due to the effect of the partition plate 14, the working of one of the ignition devices 1 in the ignition system or the working of the combustion chamber 3 of the engine will not affect the remaining unignited ignition devices 1. The problem of difficult repeated ignition of the cross-medium powder fuel ramjet engine under water is effectively solved.

[0059] The application also provides a cross-medium engine ignition method using the cross-medium engine, comprising the following steps:

[0060] Single ignition: sending an ignition signal to the igniter 13 of one of the ignition devices 1, and igniting the oxygen-rich propellant 12 after the igniter 13 receives the ignition signal, to produce primary gas containing a large amount of oxidizing gas, and to cause the pressure in the cavity I 111 to rise, the pressure to break the partition plate 14 and the primary gas to be sprayed out of the nozzle I 112, and then the oxygen-rich propellant 12 to continue to burn stably to continuously produce high-temperature and high-oxidizing primary gas which is sprayed out of the nozzle II 22, and to mix with the fuel injected into the combustion chamber 3 from the fuel input pipe 5 and chemically react to release heat, so as to complete the ignition of the fuel;

[0061] After ignition, the fuel and the gas / liquid injected into the combustion chamber 3 from the gas / liquid inlet channel 6 are further reacted to generate combustion products which are accelerated by the nozzle 4 and discharged to generate thrust;

[0062] A plurality of ignition devices 1 can work in sequence to complete multiple ignitions of the cross-medium engine.

[0063] The above is only the embodiment of the present application, and does not limit the present application. Any skilled person in the art can make many possible changes, modifications or modifications of the technical solutions of the present application without departing from the scope of the technical solutions of the present application, and equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application without departing from the technical solutions of the present application shall fall within the scope of protection of the technical solutions of the present application.

Claims

1. An ignition device, characterized in that, It includes a shell I (11), an oxygen-enriched propellant (12), an igniter (13), and a partition (14). The housing I (11) has a cavity I (111) and a nozzle I (112) communicating with the cavity I (111). The oxygen-enriched propellant (12) and the igniter (13) are disposed within the cavity I (111); The baffle (14) is disposed at the nozzle I (112) for sealing the nozzle I (112) before the ignition device is ignited, and for breaking and releasing the nozzle I (112) after the ignition device is ignited. The partition (14) is an arc-shaped plate, and the center of the partition (14) is located on one side of the cavity I (111); A flange (16) is provided at the nozzle I (112), and the convex surface of the partition (14) abuts against the opening I of the flange (16). A partition limiting member (15) is also provided in the cavity I (111), and the end face of the partition (14) abuts against the partition limiting member (15). The partition limiting member (15) includes a channel (151) and a limiting cone hole (152) connected in sequence. The small end of the limiting cone hole (152) is connected to the channel (151), and the large end is connected to the nozzle I (112). The end face of the partition (14) abuts against the cone surface of the limiting cone hole (152). The flange (16) is screwed onto the nozzle I (112).

2. The ignition device as described in claim 1, characterized in that, The partition limiting member (15) is made of heat-insulating material.

3. The ignition device as described in claim 1, characterized in that, The housing I (11) includes a main shell (113) and a cover plate (114). A cavity (1131) is provided on the main shell (113), and an opening II (1132) is provided at one end of the cavity (1131). The cover plate (114) is sealed and installed on the opening II (1132) and surrounds the cavity (1131) to form the cavity I (111). The nozzle I (112) is provided on the cover plate (114). The other end of the partition limiting member (15) abuts against the connection between the cover plate (114) and the opening II (1132).

4. An ignition system, characterized in that, Includes housing II (2) and several ignition devices (1) as described in any one of claims 1-3; The housing II (2) has a cavity II (21) and a nozzle II (22) communicating with the cavity II (21). A plurality of ignition devices (1) are disposed in the cavity II (21), and the nozzle I (112) of the ignition device (1) faces the nozzle II (22). Several of the aforementioned ignition devices (1) can be independently controlled for ignition.

5. A transmedium engine, characterized in that, It includes a combustion chamber (3), one end of which is provided with an ignition system as described in claim 4, and the other end is provided with a nozzle (4). A fuel input pipe (5) is provided on the side of the combustion chamber (3) near the ignition system. A gas / liquid inlet channel (6) is also provided between the fuel input pipe (5) and the nozzle (4) in the combustion chamber (3).

6. A cross-medium engine ignition method, characterized in that, Using the cross-medium engine as described in claim 5 includes the following steps: Single ignition: An ignition signal is sent to the igniter (13) of one of the ignition devices (1). After receiving the ignition signal, the igniter (13) ignites the oxygen-rich propellant (12), generating a primary combustion gas containing a large amount of oxidizing gas, which causes the pressure inside cavity I (111) to rise. The pressure breaks the partition (14) and is ejected from nozzle I (112) along with the primary combustion gas. Subsequently, the oxygen-rich propellant (12) continues to burn stably, continuously generating high-temperature, high-oxidizing primary combustion gas which is ejected from nozzle II (22) and mixed with the fuel injected into the combustion chamber (3) through the fuel input pipe (5) and undergoes a chemical reaction to release heat, thus completing the ignition of the fuel. After ignition, the fuel reacts further with the gas / liquid injected into the combustion chamber (3) from the gas / liquid inlet channel (6), and the combustion products generated are accelerated out by the nozzle (4) and generate thrust; Several ignition devices (1) can work in sequence to complete multiple ignitions of the cross-medium engine.

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