Hydrogen peroxide-kerosene gas generator

Abstract

This application relates to the field of aerospace technology, and particularly to a hydrogen peroxide-kerosene gas generator. The hydrogen peroxide-kerosene gas generator includes a kerosene supply assembly, a nozzle, a hydrogen peroxide supply assembly communicated with one end of the nozzle, and a thrust assembly communicated with the other end of the nozzle; a guiding flow channel is formed in the nozzle along a first direction, and a spiral groove extending along the first direction is formed in the outer side wall of the nozzle; the hydrogen peroxide supply assembly has a catalytic part and a cylindrical guiding part; the cylindrical guiding part penetrates through the guiding flow channel and forms an annular guiding gap with the guiding flow channel, and hydrogen peroxide is injected into the thrust assembly through the annular guiding gap; the kerosene supply assembly injects kerosene into the thrust assembly in a spiral manner. In this application, under the same conditions, the same kerosene will contact the surface of more oxidants, increasing the contact area between the fuel and the oxidant, improving the atomization effect, thereby achieving a better mixing effect and improving the combustion performance of the gas generator.

Description

Technical Field

[0001] This application relates to the field of aerospace technology, and particularly to a hydrogen peroxide-kerosene gas generator. Background Art

[0002] A gas generator can generate combustion gas with a certain pressure and temperature, and this combustion gas can impact turbine blades to drive the turbine to do work.

[0003] Existing gas generators adopt a non-self-igniting propellant method. The fuel and oxidizer enter the inner cavity through nozzles and are ignited by a powder igniter or a torch igniter to generate a large amount of high-temperature gas, thereby driving the turbine.

[0004] However, the existing non-self-igniting propellant requires an igniter to ignite the gas generator, resulting in a certain time required for the ignition process and a slow turbine start-up response.

[0005] Therefore, there is an urgent need for a hydrogen peroxide-kerosene gas generator to solve the technical problems existing in the prior art to a certain extent. Summary of the Invention

[0006] The purpose of this application is to provide a hydrogen peroxide-kerosene gas generator to solve, to a certain extent, the technical problem that the existing non-self-igniting propellant requires an igniter to ignite the gas generator, resulting in a certain time required for the ignition process and a slow turbine start-up response.

[0007] This application provides a hydrogen peroxide-kerosene gas generator, including a kerosene supply assembly, a nozzle, a hydrogen peroxide supply assembly connected to one end of the nozzle, and a thrust assembly connected to the other end of the nozzle;

[0008] A diversion flow channel is formed in the nozzle along a first direction, and a spiral groove extending along the first direction is formed on the outer side wall of the nozzle;

[0009] The hydrogen peroxide supply assembly has a catalytic part and a cylindrical outlet part connected to the catalytic part; the catalytic part is used for catalytic decomposition of hydrogen peroxide; the cylindrical outlet part penetrates through the diversion flow channel and forms an annular diversion gap with the diversion flow channel, and the catalytically decomposed hydrogen peroxide is injected into the thrust assembly through the annular diversion gap;

[0010] The kerosene supply assembly has a supply part, and the supply part is communicated with the spiral groove so that kerosene is injected into the thrust assembly in a spiral manner.

[0011] In the above technical solution, further, the diversion flow channel has a first tapered part and a first straight-through part communicated with the first tapered part, and the cylindrical outlet part sequentially penetrates through the first tapered part and the first straight-through part.

[0012] In the above technical solution, further, three spiral grooves are provided, and the three spiral grooves are arranged at equal intervals along the circumferential direction of the side wall of the nozzle.

[0013] In the above technical solution, further, the hydrogen peroxide supply component includes a hydrogen peroxide injection joint and a catalytic bed member connected to the hydrogen peroxide injection joint;

[0014] The catalytic bed member includes a catalytic bed housing and a cylindrical guide rod serving as the columnar lead-out portion. A first installation cavity and a first accommodation cavity are formed in the catalytic bed housing;

[0015] A catalytic bed serving as the catalytic portion is arranged in the first accommodation cavity, and the cylindrical guide rod is arranged on the side of the catalytic bed away from the hydrogen peroxide injection joint;

[0016] At least a part of the hydrogen peroxide injection joint is placed in the first installation cavity so that the hydrogen peroxide is injected into the catalytic bed through the hydrogen peroxide injection nozzle.

[0017] In the above technical solution, further, the hydrogen peroxide supply component further includes a hydrogen peroxide injection panel;

[0018] The hydrogen peroxide injection panel is arranged between the hydrogen peroxide injection joint and the catalytic bed.

[0019] In the above technical solution, further, the kerosene supply component includes a kerosene supply panel;

[0020] The kerosene supply panel internally has a second installation cavity and a second accommodation cavity;

[0021] At least a part of the catalytic bed housing can be installed in the second installation cavity;

[0022] The second accommodation cavity is used to accommodate the nozzle, and a spiral channel is formed between the second accommodation cavity and the nozzle;

[0023] A liquid collecting groove communicated with the spiral groove is further formed on the outer side wall of the nozzle, and a liquid collecting cavity is formed between the liquid collecting groove and the second accommodation cavity; the kerosene supply panel is provided with a kerosene conduction flow channel along a second direction, and the kerosene conduction flow channel is communicated with the liquid collecting cavity.

[0024] In the above technical solution, further, the thrust component includes a thrust chamber and a diversion chamber communicated with the thrust chamber;

[0025] The thrust chamber is arranged on the side of the kerosene supply panel away from the catalytic bed;

[0026] A thrust passage is provided in the thrust chamber along the first direction, and the thrust passage is respectively communicated with the spiral passage and the annular diversion gap.

[0027] In the above technical solution, further, a nozzle member is further included, and the nozzle member is disposed between the thrust chamber and the diversion chamber;

[0028] A compression passage is provided in the diversion chamber along the first direction, one end of the compression passage is communicated with the thrust passage and the other end is communicated with the diversion chamber;

[0029] The compression passage sequentially includes a connected second straight portion, a second tapered portion, and an expansion portion along the first direction;

[0030] The maximum diameter of the expansion portion is smaller than the maximum diameter of the second tapered portion.

[0031] In the above technical solution, further, a support member is further included, and the support member includes a connecting rod and a fixing member;

[0032] The connecting rod sequentially passes through the kerosene supply panel, the nozzle member, and the diversion chamber, and the connecting rod is fixed to the kerosene supply panel and the diversion chamber by the fixing member.

[0033] In the above technical solution, further, seals are provided between the hydrogen peroxide injection joint and the catalytic bed housing, between the hydrogen peroxide injection panel and the catalytic bed housing, between the catalytic bed housing and the nozzle, between the nozzle and the kerosene inlet nozzle, between the kerosene supply panel and the connection of the thrust chamber, and between the thrust chamber and the nozzle member.

[0034] Compared with the prior art, the beneficial effects of the present application are:

[0035] The present application provides a hydrogen peroxide-kerosene gas generator, including a kerosene supply assembly, a nozzle, a hydrogen peroxide supply assembly communicated with one end of the nozzle, and a thrust assembly communicated with the other end of the nozzle;

[0036] A diversion flow passage is provided in the nozzle along the first direction, and a spiral groove extending along the first direction is provided on the outer side wall of the nozzle;

[0037] The hydrogen peroxide supply assembly has a catalytic portion and a cylindrical lead-out portion connected to the catalytic portion; the catalytic portion is used for catalytic decomposition of hydrogen peroxide; the cylindrical lead-out portion penetrates the diversion flow passage, and an annular diversion gap is formed between the cylindrical lead-out portion and the diversion flow passage, and the catalytically decomposed hydrogen peroxide is injected into the thrust assembly through the annular diversion gap;

[0038] The kerosene supply component has a supply part which communicates with the spiral groove so that kerosene is injected into the thrust component in a spiral manner.

[0039] In summary, in the present application, the oxidant (oxygen obtained by catalytic decomposition of hydrogen peroxide) can be injected from the annular diversion gap, and the fuel (kerosene) will be spirally injected from the spiral groove. After injection, due to the different injection speeds of the two, a strong spiral shear force will be generated at the flow interface between the fuel and the oxidant. Under the action of the spiral shear force, it is beneficial to the diffusion combustion of the fuel and the oxidant; specifically, under the same conditions, the same kerosene fuel will contact the surface of more oxidants, greatly increasing the contact area between the fuel and the oxidant, improving the atomization effect, thereby achieving a better mixing effect and improving the combustion performance of the gas generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 is a three-dimensional structural schematic diagram of the hydrogen peroxide kerosene gas generator provided by the present application;

[0042] Figure 2 is a planar structural schematic diagram of the hydrogen peroxide kerosene gas generator provided by the present application;

[0043] Figure 3 is Figure 2 an enlarged view of part A of

[0044] Figure 4 is a planar structural schematic diagram of the catalytic bed component of the hydrogen peroxide kerosene gas generator provided by the present application;

[0045] Figure 5 is a structural schematic diagram of the hydrogen peroxide injection panel of the hydrogen peroxide kerosene gas generator provided by the present application from the first perspective;

[0046] Figure 6 is a structural schematic diagram of the hydrogen peroxide injection panel of the hydrogen peroxide kerosene gas generator provided by the present application from the second perspective;

[0047] Figure 7 is a structural schematic diagram of the catalytic bed component of the hydrogen peroxide kerosene gas generator provided by the present application from the first perspective;

[0048] Figure 8Schematic structural diagram of the catalytic bed component of the hydrogen peroxide-kerosene gas generator provided by this application from a second perspective;

[0049] Figure 9 Schematic structural diagram of the nozzle of the hydrogen peroxide-kerosene gas generator provided by this application from a first perspective;

[0050] Figure 10 Schematic structural diagram of the nozzle of the hydrogen peroxide-kerosene gas generator provided by this application from a second perspective.

[0051] Reference numerals:

[0052] 101 - nozzle; 104 - first direction; 105 - diversion flow channel; 106 - spiral groove; 107 - annular diversion gap; 108 - first tapered portion; 109 - first straight portion; 110 - hydrogen peroxide injection joint; 112 - catalytic bed housing; 113 - cylindrical guide rod; 114 - first installation cavity; 115 - first accommodation cavity; 116 - catalytic bed; 117 - kerosene supply panel; 118 - second installation cavity; 119 - second accommodation cavity; 120 - spiral channel; 121 - liquid collection tank; 122 - liquid collection cavity; 123 - second direction; 124 - kerosene conduction flow channel; 125 - thrust chamber; 126 - diversion chamber; 127 - thrust channel; 128 - nozzle component; 129 - compression channel; 130 - second straight portion; 131 - second tapered portion; 132 - expansion portion; 133 - seal; 134 - connecting rod; 135 - fixing member; 136 - nozzle pressing plate; 137 - diversion chamber pressing plate; 138 - limiting block; 139 - nozzle; 141 - through hole. Detailed implementation manners

[0053] Next, the technical solutions of this application will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of this application.

[0054] Generally, the components of the embodiments of this application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents the selected embodiments of this application.

[0055] Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0056] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0057] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0058] The following refers to Figures 1 to 10 Describe the hydrogen peroxide-kerosene gas generator provided by the present application.

[0059] The present application provides a hydrogen peroxide-kerosene gas generator for driving the impeller of a turbine pump of a rocket engine; by controlling the combustion of hydrogen peroxide and kerosene, a large amount of high-temperature gas is generated, and the high-temperature gas is used to drive the impeller of the turbine pump. Specifically, the hydrogen peroxide-kerosene gas generator includes a kerosene supply assembly for supplying kerosene, a nozzle 101, a hydrogen peroxide supply assembly connected to one end of the nozzle 101 for supplying hydrogen peroxide, and a thrust assembly connected to the other end of the nozzle 101; wherein, in the thrust assembly, the full combustion of kerosene and oxygen can be completed, and the generated gas is used to impact the impeller of the turbine pump.

[0060] A guiding flow channel 105 is provided in the nozzle 101 along a first direction 104 (the first direction 104 herein refers to Figure 1 as shown), and a spiral groove 106 extending along the first direction 104 is provided on the outer side wall of the nozzle 101; the hydrogen peroxide supply assembly has a catalytic part and a cylindrical guiding part connected to the catalytic part, preferably a cylindrical guiding part; the catalytic part is used for catalytic decomposition of hydrogen peroxide; the cylindrical guiding part penetrates the guiding flow channel 105, and an annular guiding gap 107 is formed between the cylindrical guiding part and the guiding flow channel 105, and the catalytically decomposed hydrogen peroxide is injected into the thrust assembly through the annular guiding gap 107; the kerosene supply assembly has a supply part, and the supply part is communicated with the spiral groove 106 so that kerosene is injected into the thrust assembly in a spiral manner.

[0061] In summary, in the present application, the oxidant (oxygen obtained by catalytic decomposition of hydrogen peroxide) can be injected from the annular diversion gap 107, and the fuel (kerosene) will be spirally injected from the spiral groove 106. After injection, due to the different injection speeds of the two, a strong spiral shear force will be generated at the flow interface between the fuel and the oxidant. Under the action of the spiral shear force, it is beneficial to the diffusion combustion of kerosene fuel and oxidant; specifically, under the same conditions, the same kerosene fuel will contact more oxidant surfaces, greatly increasing the contact area between the kerosene fuel and the oxidant, improving the atomization effect, thereby achieving a better mixing effect and improving the combustion performance of the gas generator.

[0062] It should be noted that: in the present application, the axis of the annular diversion gap 107 is coaxial with the axis of the spiral groove 106.

[0063] In this embodiment, in combination with Figure 2 and Figure 3 as shown, the diversion flow channel 105 has a first tapered portion 108 communicating along the first direction 104 and a first straight-through portion 109 communicating with the first tapered portion 108; further, the first tapered portion 108 is a frustum structure and the first tapered portion 108 gradually tapers along the first direction 104, and the first straight-through portion 109 is a cylindrical structure.

[0064] Specifically, the cylindrical outlet portion sequentially passes through the first tapered portion 108 and the first straight-through portion 109, that is, the cross-section of the annular diversion gap 107 formed between the cylindrical outlet portion and the diversion flow channel 105 is initially variable in diameter (the cross-sectional diameter gradually becomes smaller), and then remains stable (the cross-sectional diameter remains unchanged); that is to say, when the catalytically decomposed oxygen and water vapor pass through the annular diversion gap 107, the oxidant diversion area changes from large to small and finally remains unchanged, thereby increasing the injection speed of oxygen and water vapor, that is, oxygen and water vapor will be injected into the thrust assembly at a higher speed.

[0065] In this embodiment, in combination with Figure 9 and Figure 10 as shown, preferably, three spiral grooves 106 are provided, and the three spiral grooves 106 are arranged at equal intervals in the circumferential direction of the side wall of the nozzle 101 to improve the injection uniformity of kerosene.

[0066] In this embodiment, in combination with Figure 1 , Figure 2 , Figure 4 Figure 7 and Figure 8 as shown, the hydrogen peroxide supply assembly includes a hydrogen peroxide injection joint 110 and a catalytic bed member connected to the hydrogen peroxide injection joint 110.

[0067] Specifically, the hydrogen peroxide injection joint 110 is used for pipeline connection and is used to introduce hydrogen peroxide into the catalytic bed member.

[0068] Specifically, the catalytic bed member includes a catalytic bed housing 112, and a first installation cavity 114 and a first accommodation cavity 115 are formed in the catalytic bed housing 112; a catalytic bed 116 serving as the catalytic part is arranged in the first accommodation cavity 115, and the first accommodation cavity 115 can realize the radial positioning of the catalytic bed 116; preferably, the catalytic bed 116 is a silver mesh catalytic bed 116, and the silver mesh catalytic bed 116 is formed by stacking multiple layers of nickel-based silver meshes. Such a catalytic bed 116 can catalytically decompose 98% hydrogen peroxide with a high concentration into oxygen and water vapor at a high temperature (about 0K).

[0069] Specifically, the catalytic bed member further includes a cylindrical guide rod 113 that can serve as the cylindrical lead-out part, and the cylindrical guide rod 113 is arranged on the side of the catalytic bed 116 away from the hydrogen peroxide injection joint 110.

[0070] Specifically, at least part of the hydrogen peroxide injection joint 110 is placed inside the first installation cavity 114 so that the hydrogen peroxide is injected into the catalytic bed 116 through the hydrogen peroxide injection nozzle.

[0071] Preferably, the hydrogen peroxide injection joint 110 placed inside the first installation cavity 114 is threadedly connected to the catalytic bed housing 112.

[0072] Preferably, a seal 133 is arranged between the hydrogen peroxide injection joint 110 and the catalytic bed housing 112; more preferably, the seal 133 is a sealing rubber ring.

[0073] More specifically, in order to improve the uniformity of hydrogen peroxide injection into the catalytic bed 116, the hydrogen peroxide supply assembly further includes a hydrogen peroxide injection panel; the hydrogen peroxide injection panel is arranged between the hydrogen peroxide injection joint 110 and the catalytic bed 116 and is located inside the first installation cavity 114, and the first installation cavity 114 is used to provide radial positioning for the hydrogen peroxide injection panel.

[0074] Furthermore, in combination with Figure 5 as shown, the hydrogen peroxide injection panel is provided with a plurality of through holes 141 along the first direction 104, and the hydrogen peroxide is introduced into the catalytic bed 116 through the through holes.

[0075] Furthermore, in combination with Figure 6As shown, a limiting block 138 is provided on one side of the hydrogen peroxide injection panel facing the catalytic bed 116, and a limiting groove is provided on one side of the catalytic bed 116 facing the hydrogen peroxide injection panel. The limiting block 138 can be inserted into the limiting groove to fix the hydrogen peroxide injection panel.

[0076] Further, a seal 133 is provided between the hydrogen peroxide injection panel and the catalytic bed housing 112; more preferably, the seal 133 is a sealing rubber ring.

[0077] In this embodiment, in combination with Figure 2 and Figure 3 as shown, the kerosene supply assembly includes a kerosene supply panel 117; the kerosene supply panel 117 has a second installation cavity 118 and a second accommodation cavity 119 inside.

[0078] Specifically, at least part of the catalytic bed housing 112 can be installed in the second installation cavity 118; preferably, the kerosene supply panel 117 and the catalytic bed housing 112 are connected by threads; the second accommodation cavity 119 is used to accommodate the nozzle 101, and a spiral channel 120 is formed between the second accommodation cavity 119 and the spiral groove 106 on the nozzle 101. Further, a sealing ring is provided between the nozzle 101 and the kerosene supply panel 117; a sealing ring is provided between the catalytic bed housing 112 and the nozzle 101.

[0079] Specifically, a liquid collecting groove 121 communicating with the spiral groove 106 is further provided on the outer side wall of the nozzle 101, and a liquid collecting cavity 122 is formed between the liquid collecting groove 121 and the second accommodation cavity 119. The liquid collecting cavity 122 is used to accumulate kerosene, which is beneficial to filling the spiral channel 120 with kerosene; the kerosene supply panel 117 is provided with a kerosene conduction flow channel 124 along the second direction 123 (the second direction 123 is shown in Figure 3 ) and the kerosene conduction flow channel 124 communicates with the liquid collecting cavity 122.

[0080] The supply process of kerosene is as follows: First, kerosene is supplied to the liquid collecting cavity 122 through the kerosene conduction flow channel 124. Then, the kerosene will be injected into the thrust assembly in a spiral manner through the spiral channel 120 and generate a spiral shear force with the circumferentially injected high-temperature oxygen and high-temperature water vapor, thereby improving the mixing efficiency and combustion efficiency.

[0081] In this embodiment, in combination with Figure 2 as shown, the thrust assembly includes a thrust chamber 125 and a diversion chamber 126 communicating with the thrust chamber 125;

[0082] The thrust chamber 125 is disposed on a side of the kerosene supply panel 117 away from the catalytic bed 116; a thrust channel 127 is defined in the thrust chamber 125 along the first direction 104, and the thrust channel 127 is respectively communicated with the spiral channel 120 and the annular diversion gap 107.

[0083] Specifically, the thrust chamber 125 is a transparent thrust chamber, which can provide a flow space for the spiral shear mixing and combustion of the hydrogen peroxide decomposition gas and kerosene; meanwhile, the thrust chamber 125 helps to observe the combustion situation in real time, adjust the flow rates of hydrogen peroxide and kerosene according to the real-time combustion effect captured by the camera, and infer the ratio of the oxidant flow rate to the fuel flow rate in the thrust chamber 125, that is, the oxygen-fuel ratio reaches a suitable high-efficiency combustion range. If a large amount of black smoke is generated in the thrust chamber 125, it indicates that the oxygen-fuel ratio is too low and the fuel is excessive, which is a fuel-rich combustion, and it is necessary to appropriately reduce the fuel flow rate or increase the oxidant flow rate. If the flame in the thrust chamber 125 is abnormally bright, it indicates that the temperature in the thrust chamber 125 is too high and the oxygen-fuel ratio is on the high side, which is an oxygen-rich combustion, and it is necessary to reduce the oxidant flow rate or increase the fuel flow rate.

[0084] Specifically, the diversion chamber 126 is a transparent tail flame diversion chamber, which can direct the high-temperature and low-speed tail flame jet to the turbine impeller. At the same time, the transparent tail flame diversion chamber is made of transparent quartz glass. The carbon black accumulated in the diversion chamber can be observed by the naked eye, so as to determine whether to clean the thrust chamber 125.

[0085] Preferably, a sealing ring is disposed between the kerosene supply panel 117 and the thrust chamber 125 in communication therewith.

[0086] In this embodiment, as shown in combination with Figure 2 the hydrogen peroxide-kerosene gas generator further includes a nozzle member 128, and the nozzle member 128 is disposed between the thrust chamber 125 and the diversion chamber 126; specifically, the nozzle member 128 includes a nozzle 139 and a nozzle pressing plate 136, and the nozzle pressing plate 136 is used to fix the nozzle 139; preferably, the nozzle 139 is a graphite nozzle.

[0087] More specifically, a compression channel 129 is defined in the nozzle 139 along the first direction 104, one end of the compression channel 129 is communicated with the thrust channel 127 and the other end is communicated with the diversion chamber 126; the compression channel 129 sequentially includes a connected second straight portion 130, a second tapered portion 131 and an expansion portion 132 along the first direction 104; the maximum diameter of the expansion portion 132 is smaller than the maximum diameter of the second tapered portion 131.

[0088] Furthermore, the graphite nozzle can be understood as a de Laval nozzle 139, which can convert the internal energy of the fluid into kinetic energy. That is, the high-temperature and low-speed combustion products generated by the combustion of oxygen and kerosene can become a low-temperature and high-speed tail flame jet after passing through the nozzle 139. The tail flame jet has a strong work capacity and can drive the turbine more effectively, thereby improving the efficiency of the gas generator. At the same time, the temperature of the tail flame jet is reduced, which can prevent the impeller of the turbine from being eroded by high temperature and extend the life of the turbine.

[0089] Preferably, a sealing ring is provided between the thrust chamber 125 and the nozzle 139.

[0090] In this embodiment, as shown in Figure 1 and Figure 2 , it further includes a support member, and the support member includes a connecting rod 134 and a fixing member; the connecting rod 134 sequentially passes through the kerosene supply panel 117, the nozzle pressing plate 136 in the nozzle member 128, and the flow guide chamber pressing plate 137 for fixing the flow guide chamber 126, and the fixing member 135 is used to fix one end of the connecting rod 134 to the kerosene supply panel 117 and the other end of the connecting rod 134 to the flow guide chamber pressing plate 137.

[0091] Specifically, four groups of support members are provided, and the four groups of support members are arranged at intervals along the circumferential direction of the kerosene supply panel 117. The function of the support member is to connect the kerosene supply panel 117, the nozzle pressing plate 136, and the flow guide chamber pressing plate 137. It is also possible to realize the disassembly and rapid installation after cleaning of the thrust chamber 125, the graphite nozzle, and the flow guide chamber 126 through the disassembly and assembly of the support member. In summary, the hydrogen peroxide kerosene gas generator of the present application mainly includes the following four processes:

[0092] The first process: efficient catalysis of hydrogen peroxide, using a silver mesh catalytic bed or a nickel-based silver mesh catalytic bed to catalyze high-concentration 98% hydrogen peroxide into high-temperature decomposition gas, and the decomposition gas mainly contains oxygen and water vapor at a temperature of about 0K.

[0093] The second process: solid cylindrical coaxial spiral shear injection and combustion of hydrogen peroxide and kerosene. In this process, the kerosene is injected in a spiral shear manner, and is combined with the solid cylindrical injection of the hydrogen peroxide decomposition gas. The high-temperature hydrogen peroxide decomposition gas spontaneously ignites with the kerosene, realizing the conversion from chemical energy to internal energy.

[0094] The third process: expansion and cooling, through a converging-diverging graphite nozzle, cooling and accelerating the high-temperature gas products released by combustion, reducing the temperature, and protecting the impeller of the turbine pump being impacted;

[0095] The fourth process: tail flame diversion, which is to introduce the generated low-temperature and high-speed gas into the impeller of the turbine pump, mainly for the function of diversion.

[0096] In summary, the present application proposes a structurally compact hydrogen peroxide-kerosene gas generator with fast response and multiple startups. By means of the conversion of hydrogen peroxide into high-temperature oxygen and water vapor through a nickel-based silver mesh catalytic bed 116, and utilizing the characteristic of the rapid reaction between high-temperature oxygen and kerosene, the characteristics of fast response and multiple startups of the igniter are maintained;

[0097] By means of the injection scheme of solid cylinder coaxial spiral shearing, the contact area and shear mixing effect between high-temperature oxygen and liquid kerosene are increased, and the combustion performance of the gas generator is improved;

[0098] By means of a Laval nozzle 139, the high-temperature and low-temperature gases in the thrust chamber 125 are converted into lower-temperature and high-speed jet gases, which improves the work capacity of the working medium to drive the turbine. At the same time, due to the reduction of the temperature of the driving gas, the turbine is protected and the service life of the turbine is increased.

[0099] By means of the visual thrust chamber 125 and the transparent tail flame diversion chamber 126, the processes of high-temperature combustion and tail flame diversion are made visible. Through the combustion structure of the thrust chamber 125, the oxygen-fuel ratio is adjusted in real time; through the light transmissivity of the transparent tail flame diversion chamber 126, the thrust chamber 125, the nozzle 139 and the transparent tail flame diversion chamber 126 are replaced and cleaned multiple times based on evidence, ensuring smooth flow channels and maintaining the high performance of the gas generator.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hydrogen peroxide - kerosene gas generator, characterized in that, it includes a kerosene supply assembly, a nozzle, a hydrogen peroxide supply assembly communicating with one end of the nozzle, and a thrust assembly communicating with the other end of the nozzle; a guiding flow channel is formed in the nozzle along a first direction, and a spiral groove extending along the first direction is formed on the outer side wall of the nozzle; the hydrogen peroxide supply assembly has a catalytic part and a cylindrical guiding part connected to the catalytic part; the catalytic part is used for catalytically decomposing hydrogen peroxide; the cylindrical guiding part penetrates through the guiding flow channel, and an annular guiding gap is formed between the cylindrical guiding part and the guiding flow channel, and the catalytically decomposed hydrogen peroxide is injected into the thrust assembly through the annular guiding gap; the kerosene supply assembly has a supply part, and the supply part communicates with the spiral groove so that kerosene is injected into the thrust assembly in a spiral manner; the annular guiding gap and the spiral groove are coaxial; the guiding flow channel has a first tapered part and a first straight part communicating with the first tapered part, and the cylindrical guiding part sequentially penetrates through the first tapered part and the first straight part; the hydrogen peroxide supply assembly includes a hydrogen peroxide injection joint and a catalytic bed member connected to the hydrogen peroxide injection joint; the catalytic bed member includes a catalytic bed housing and a cylindrical guiding rod serving as the cylindrical guiding part, and a first installation cavity and a first accommodation cavity are formed in the catalytic bed housing; a catalytic bed serving as the catalytic part is arranged in the first accommodation cavity, and the cylindrical guiding rod is arranged on the side of the catalytic bed away from the hydrogen peroxide injection joint; at least part of the hydrogen peroxide injection joint is placed inside the first installation cavity so that hydrogen peroxide is injected into the catalytic bed through the hydrogen peroxide injection joint.

2. The hydrogen peroxide - kerosene gas generator according to claim 1, characterized in that, three spiral grooves are provided, and the three spiral grooves are arranged at equal intervals along the circumferential direction of the nozzle side wall.

3. The hydrogen peroxide - kerosene gas generator according to claim 1, characterized in that, the hydrogen peroxide supply assembly further includes a hydrogen peroxide injection panel; the hydrogen peroxide injection panel is arranged between the hydrogen peroxide injection joint and the catalytic bed.

4. The hydrogen peroxide - kerosene gas generator according to claim 3, characterized in that, the kerosene supply assembly includes a kerosene supply panel; a second installation cavity and a second accommodation cavity are formed inside the kerosene supply panel; at least part of the catalytic bed housing can be installed in the second installation cavity; the second accommodation cavity is used for accommodating the nozzle, and a spiral channel is formed between the second accommodation cavity and the nozzle; a liquid collecting groove communicating with the spiral groove is further formed on the outer side wall of the nozzle, and a liquid collecting cavity is formed between the liquid collecting groove and the second accommodation cavity; a kerosene guiding flow channel is formed in the kerosene supply panel along a second direction, and the kerosene guiding flow channel communicates with the liquid collecting cavity.

5. The hydrogen peroxide - kerosene gas generator according to claim 4, characterized in that, the thrust assembly includes a thrust chamber and a guiding chamber communicating with the thrust chamber; The thrust chamber is arranged on a side of the kerosene supply panel away from the catalytic bed; A thrust channel is formed in the thrust chamber along the first direction, and the thrust channel is respectively communicated with the spiral channel and the annular diversion gap.

6. The hydrogen peroxide-kerosene gas generator according to claim 5, characterized in that, further comprising a nozzle member arranged between the thrust chamber and the diversion chamber; A compression channel is formed in the nozzle member along the first direction, one end of the compression channel is communicated with the thrust channel and the other end is communicated with the diversion chamber; The compression channel sequentially includes a connected second straight portion, a second tapered portion and an expansion portion along the first direction; The maximum diameter of the expansion portion is smaller than the maximum diameter of the second tapered portion.

7. The hydrogen peroxide-kerosene gas generator according to claim 6, characterized in that, further comprising a support member, the support member includes a connecting rod and a fixing member; The connecting rod sequentially passes through the kerosene supply panel, the nozzle member and the diversion chamber, and the connecting rod is fixed to the kerosene supply panel and the diversion chamber by the fixing member.

8. The hydrogen peroxide-kerosene gas generator according to claim 7, characterized in that, Sealing members are arranged between the hydrogen peroxide injection joint and the catalytic bed housing, between the hydrogen peroxide injection panel and the catalytic bed housing, between the catalytic bed housing and the nozzle, between the nozzle and the kerosene supply panel, between the kerosene supply panel and the connection of the thrust chamber, and between the thrust chamber and the nozzle member.

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