CN115575075A - Hydrogen fuel injector applied to high-temperature gas inflow condition - Google Patents
Hydrogen fuel injector applied to high-temperature gas inflow condition Download PDFInfo
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- CN115575075A CN115575075A CN202211106011.9A CN202211106011A CN115575075A CN 115575075 A CN115575075 A CN 115575075A CN 202211106011 A CN202211106011 A CN 202211106011A CN 115575075 A CN115575075 A CN 115575075A
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Abstract
The invention belongs to the field of hypersonic combustion wind tunnels, and discloses a hydrogen fuel injector applied to a high-temperature gas incoming flow condition. The hydrogen fuel injector is positioned between the high-temperature oxygen-enriched air supply cavity and the heater combustion chamber and has a concentric structure with an outer ring and an inner disc, the outer ring is a gas collecting ring, and the inner disc is a nozzle disc; the outer ring of the gas collecting ring is welded with a high-pressure hydrogen supply pipeline externally connected with a high-pressure hydrogen source, and the inner ring of the gas collecting ring is welded with a connecting pipe; the nozzle plate is formed by welding a front cover plate and a rear cover plate which are parallel front and back and have the same outer diameter; the rear cover plate is provided with a hydrogen gas flow channel corresponding to the connecting pipe, and the left and right side surfaces are provided with circular bosses; the nozzle plate is provided with a plurality of nozzles which penetrate through the nozzle plate, and the nozzles are provided with evenly distributed hydrogen injection holes near the outlet. The hydrogen fuel injector does not need to be provided with an igniter independently, can realize the sufficient mixing and self-ignition of hydrogen and high-temperature oxygen-enriched air, further generates high-temperature fuel gas and is used for carrying out a hypersonic wind tunnel test.
Description
Technical Field
The invention belongs to the field of hypersonic combustion wind tunnels, and particularly relates to a hydrogen fuel injector applied to a high-temperature gas incoming flow condition.
Background
With the development and deepening of the air-breathing hypersonic technology research, hypersonic high-temperature wind tunnels get more and more attention in recent years. The air heater is used as a main device of the hypersonic high-temperature wind tunnel and can be divided into four types of arc heating, heat accumulating type heating, combustion heating and shock tube heating according to different heating modes, wherein the construction cost and the operation cost of the arc heater and the heat accumulating type heater are very high; the shock tube heater can be used for simulating hypersonic incoming flow for a test, but the single test time is very short; the existing air heater usually adopts a combustion heating mode by comprehensively considering factors such as operating cost, test time and the like.
For an aircraft with high Mach number, the total incoming flow temperature reaches more than 2500K, the research on the hypersonic propulsion test is carried out, corresponding high-enthalpy ground test equipment is needed, the oxygen-enriched combustion heating mode of hydrogen fuel, oxygen and air is adopted, although high-temperature airflow with more than 2500K can be formed, the use of the hydrogen fuel can cause that the formed high-temperature air contains more water H 2 O, such high temperature air flow with high water content inevitably affects the accuracy of the test results.
In order to reduce the pollution degree of water components caused by combustion heating and improve the accuracy of test data, a combined heating mode of 'first-stage electric heating + second-stage combustion heating' is usually adopted. The combined heating mode is to combine the electric heater and the combustion heater in series, and the electric heater is used to heat the normal temperature oxygen-enriched air to form 800-1000K high temperature oxygen-enriched air.
The heated high-temperature oxygen-enriched air flows into the combustion heater through the high-temperature pipeline and serves as a combustion supporter, meanwhile, the injector is used for injecting hydrogen fuel into the combustion heater, the hydrogen fuel is self-ignited and releases heat in the high-temperature oxygen-enriched air environment, and finally high-temperature high-pressure test gas with relatively low water content and small water component pollution degree is generated.
The combined heating mode of 'first-stage electric heating + second-stage combustion heating' can realize the self-ignition of hydrogen in the second-stage combustion heater, so that an ignition device does not need to be separately configured, and the structure of the second-stage combustion heater is simplified. However, since the hydrogen injector operates in the high temperature gas inflow condition generated by the primary heater, and the ambient temperature is usually over 1000K, the conventional coaxial injector cannot operate in such a high temperature environment and is very easy to ablate. There is a need to develop a hydrogen fuel injector for use in high temperature gas inflow conditions.
Disclosure of Invention
The invention aims to provide a hydrogen fuel injector applied to a high-temperature gas incoming flow condition.
The invention relates to a hydrogen fuel injector applied to a high-temperature gas incoming flow condition, which is characterized in that the hydrogen fuel injector is positioned between an oxygen-enriched air supply cavity and a heater combustion chamber, the hydrogen fuel injector is of a concentric structure with an outer ring and an inner disc, the outer ring is a gas collecting ring, and the inner disc is a nozzle disc;
the outer ring of the gas collecting ring is welded with a plurality of high-pressure hydrogen supply pipelines which are uniformly distributed along the circumferential direction of the outer ring, and the high-pressure hydrogen supply pipelines are externally connected with a high-pressure hydrogen source; the inner ring of the gas collecting ring is welded with a plurality of connecting pipes which are uniformly distributed along the circumferential direction of the inner ring;
the nozzle plate is formed by combining and welding a front cover plate, a rear cover plate and a plurality of nozzles, wherein the front cover plate and the rear cover plate are parallel to each other in front and back and have the same outer diameter;
the left surface of the front cover plate faces the outlet flange of the oxygen-enriched air supply cavity, and the left surface of the front cover plate is provided with a circular boss which is embedded into a matched circular groove with equal diameter on the outlet flange of the oxygen-enriched air supply cavity, so that the strength and the sealing property of a connecting position are ensured; the right side surface of the front cover plate faces the left side surface of the rear cover plate, a circular groove is formed in the right side surface of the front cover plate in an extending mode and used for being embedded into a matched circular boss with the same diameter on the left side surface of the rear cover plate, and therefore strength and sealing performance of a connecting position are guaranteed;
the rear cover plate is internally provided with an air duct corresponding to the connecting pipe; the vent pipe opening on the surface of the rear cover plate is connected with the connecting pipe in a welding way, so that hydrogen can enter the hydrogen gas collection cavity through the connecting pipe and the vent pipe opening; the left surface of the rear cover plate faces the right surface of the front cover plate, and the left surface of the rear cover plate is provided with a circular boss which is embedded into a matched circular groove with the same diameter on the right surface of the front cover plate, so that the strength and the sealing property of a connecting position are ensured; the right side surface of the rear cover plate faces the combustion chamber inlet flange, and a circular boss is arranged on the right side surface of the rear cover plate and is used for being embedded into a matched circular groove with the same diameter on the combustion chamber inlet flange, so that the strength and the sealing property of a connecting position are ensured;
the nozzle plate is provided with a plurality of conical through holes for mounting a hydrogen nozzle, the inner diameter of the left side of each conical through hole is larger than that of the right side of each conical through hole, 1 conical through hole is positioned in the center of the nozzle plate, and the rest conical through holes are distributed in a central symmetry manner; 1 conical nozzle is assembled in each conical through hole, and a plurality of injection holes which are uniformly distributed are formed in the position, close to the right side surface of the rear cover plate, of each nozzle along the circumferential direction; when the nozzle is installed on the nozzle disc, the left side surface of the nozzle is flush with the left side surface of the front cover plate, and the right side surface of the nozzle is flush with the right side surface of the rear cover plate;
the inner surface of a nozzle disc formed by combining the front cover plate and the rear cover plate and the outer surface of a plurality of nozzles installed behind the conical through holes are used as boundaries to form a hydrogen gas collection cavity;
high-pressure hydrogen of a high-pressure hydrogen source enters a gas collecting ring from a high-pressure hydrogen supply pipeline, then sequentially enters a connecting pipe and a hydrogen gas collecting cavity along the gas collecting ring, enters an airflow channel of a nozzle from an injection hole, and is mixed with high-temperature oxygen-enriched air entering from a high-temperature oxygen-enriched air supply cavity at the rear section of the airflow channel, in the mixing process, the hydrogen is spontaneously combusted in the high-temperature oxygen-enriched air to generate high-temperature fuel gas, and the high-temperature fuel gas is sprayed out from the nozzle;
the calculation formula of the hydrogen flow rate of the single nozzle is as follows:
wherein:
-hydrogen flow, kg/s; n is the number of injection holes of the nozzle;
A h -nozzle bore flow area; t-hydrogen temperature, 300K is taken;
p-nozzle inlet pressure; r is hydrogen gas constant, 4124 is taken;
gamma-hydrogen specific heat ratio, 1.4; m is Mach number, which is 1.
Furthermore, the material of each part in the hydrogen fuel injector is high-temperature alloy GH3030.
Furthermore, the welding mode is argon arc welding.
Further, the gas flow channel has a convergent-divergent profile, the inlet cross section and the outlet cross section of the gas flow channel have the same diameter, and the minimum cross sectional area of the gas flow channel is 70% of the inlet and outlet cross sectional areas.
Further, the distance between the inlet cross-section of the air flow channel and the smallest cross-section of the air flow channel is 40% of the length of the nozzle, and the distance between the outlet cross-section of the air flow channel and the smallest cross-section of the air flow channel is 60% of the length of the nozzle.
Furthermore, the injection holes are circular holes with equal diameters, and the included angle between the axis of each circular hole and the central axis of the airflow channel is 45 degrees.
Further, the length from the opening position of the injection hole to the inlet cross section of the airflow channel is 70% of the total length of the nozzle.
The nozzle of the hydrogen fuel injector applied to the high-temperature gas incoming flow condition is provided with the uniformly distributed injection holes to form a mutual-impact nozzle, so that the hydrogen and the high-temperature oxygen-enriched air can be fully mixed and self-ignited.
The hydrogen fuel injector applied to the high-temperature gas inflow condition is characterized in that each component is made of high-temperature alloy GH3030, each component is of a thick-wall structure, the wall thickness is enough to bear the scouring of the high-temperature oxygen-enriched air inflow of more than 5.0MPa and 1000K, and the hydrogen fuel injector has good heat sink capacity and can effectively bear the scouring of high-temperature and high-pressure airflow.
The high-pressure hydrogen continuously sprayed into the hydrogen fuel injector applied to the high-temperature gas inflow condition can form a gas film boundary layer on the wall surface of the nozzle, so that the nozzle is protected from ablation.
The hydrogen fuel injector applied to the high-temperature gas incoming flow condition does not need to be provided with an igniter independently, and the structural complexity is reduced.
The hydrogen fuel injector applied to the high-temperature gas inflow condition can realize the full mixing and self-ignition of hydrogen and oxygen-enriched air, further generate high-temperature fuel gas and be used for developing a hypersonic wind tunnel test in a high-total enthalpy pulse combustion wind tunnel.
Drawings
FIG. 1 is a schematic illustration (perspective) of the hydrogen fuel injector of the present invention applied to a high temperature gas inflow condition;
FIG. 2 is a schematic diagram (in main section) of the hydrogen fuel injector of the present invention applied to a high temperature gas inflow condition;
FIG. 3 is a schematic diagram of the hydrogen fuel injector of the present invention applied to a high temperature gas inflow condition (A-A1 cross-sectional view);
FIG. 4 is a schematic diagram (B-B1 cross-section) of the hydrogen fuel injector of the present invention in use with high temperature gas incoming flow conditions;
fig. 5 is a schematic view of a nozzle structure of the present invention applied to a hydrogen fuel injector under a high temperature gas inflow condition.
In the figure, 1, a gas collecting ring; 2. a connecting pipe; 3. a front cover plate; 4. a rear cover plate; 5. a hydrogen gas collection cavity; 6. a nozzle; 7. an injection hole; 8. an air flow channel.
Detailed Description
The present invention is described in detail below with reference to the drawings and examples.
The hydrogen fuel injector applied to the high-temperature gas inflow condition is installed on a heater of a hypersonic wind tunnel, a gas collecting ring 1 is provided with 2 high-pressure hydrogen supply pipelines, 8 connecting pipes 2, 1 front cover plate 3, 1 rear cover plate 4,7 nozzles 6 penetrating through the front cover plate 3 and the rear cover plate 4, each nozzle 6 is provided with 6 injection holes 7, and each nozzle 6 is provided with an airflow channel 8. The left side of a front cover plate 3 of the ejector is connected with a high-temperature oxygen-enriched air supply cavity, the right side of a rear cover plate 4 is connected with a heater combustion chamber, high-temperature oxygen-enriched air flows towards the combustion chamber through an air flow channel 8 in the middle of a nozzle 6 on the ejector, meanwhile, hydrogen supplied by a high-pressure air source is collected by a gas collecting ring 1, uniformly enters a hydrogen gas collecting cavity 5 through a connecting pipe 2, then enters the air flow channel 8 through a spray hole 7, is mixed with the high-temperature oxygen-enriched air supplied at the upstream and spontaneously combusts, and combusts in the downstream combustion chamber, so that high-temperature fuel gas required by a test is generated.
As shown in fig. 1 to 5, the hydrogen fuel injector applied to the high temperature gas inflow condition of the present embodiment is located between the oxygen-enriched air supply cavity and the heater combustion chamber, the hydrogen fuel injector is of a concentric structure with an outer ring and an inner disc, the outer ring is a gas collecting ring 1, and the inner disc is a nozzle disc;
the outer ring of the gas collecting ring 1 is welded with a plurality of high-pressure hydrogen supply pipelines which are uniformly distributed along the circumferential direction of the outer ring, and the high-pressure hydrogen supply pipelines are externally connected with a high-pressure hydrogen source; the inner ring of the gas collecting ring 1 is welded with a plurality of connecting pipes 2 which are uniformly distributed along the circumferential direction of the inner ring;
the nozzle plate is formed by combining and welding a front cover plate 3, a rear cover plate 4 and a plurality of nozzles 6 which penetrate through the front cover plate 3 and the rear cover plate 4 and are arranged in parallel front and back and have the same outer diameter;
the left surface of the front cover plate 3 faces the outlet flange of the oxygen-enriched air supply cavity, and the left surface of the front cover plate 3 is provided with a circular boss which is embedded into a matched circular groove with the same diameter on the outlet flange of the oxygen-enriched air supply cavity, so that the strength and the sealing property of a connecting position are ensured; the right side surface of the front cover plate 3 faces the left side surface of the rear cover plate 4, a circular groove extends out of the right side surface of the front cover plate 3, and the groove is used for being embedded into a matched circular boss with equal diameter on the left side surface of the rear cover plate 4, so that the strength and the sealing performance of a connecting position are guaranteed;
an air duct corresponding to the connecting pipe 2 is arranged in the rear cover plate 4; the left surface of the rear cover plate 4 faces the right surface of the front cover plate 3, and the left surface of the rear cover plate 4 is provided with a circular boss which is embedded into a matched circular groove with the same diameter on the right surface of the front cover plate 3, so that the strength and the sealing property of a connecting position are ensured; the right side surface of the rear cover plate 4 faces the combustion chamber inlet flange, and the right side surface of the rear cover plate 4 is provided with a circular boss which is used for being embedded into a matched circular groove with the same diameter on the combustion chamber inlet flange, so that the strength and the sealing property of a connecting position are ensured;
the nozzle plate is provided with a plurality of conical through holes for mounting the nozzles 6, the inner diameter of the left side of each conical through hole is larger than that of the right side of each conical through hole, 1 conical through hole is positioned in the center of the nozzle plate, and the rest conical through holes are distributed in a central symmetry manner; 1 conical nozzle 6 is assembled in each conical through hole, and a plurality of injection holes 7 which are uniformly distributed are formed in the position, close to the right side surface of the rear cover plate 4, of the nozzle 6 along the circumferential direction;
the right side surface of the front cover plate 3, the circular groove and the surfaces of the nozzles 6 form a hydrogen gas collecting cavity 5;
high-pressure hydrogen of a high-pressure hydrogen source enters a gas collecting ring 1 from a high-pressure hydrogen supply pipeline, then sequentially enters a connecting pipe 2 and a hydrogen gas collecting cavity 5 along the gas collecting ring 1, enters a nozzle 6 from an injection hole 7, and is mixed with oxygen-enriched air entering from a high-temperature oxygen-enriched air supply cavity at the rear section of the nozzle 6, in the mixing process, the hydrogen is spontaneously combusted in the high-temperature oxygen-enriched air to generate high-temperature fuel gas, and the high-temperature fuel gas is sprayed out from the nozzle 6;
the hydrogen flow rate of the individual nozzles 6 is calculated by the formula:
wherein:
-hydrogen flow, kg/s; n is the number of injection holes of the nozzle;
A h -nozzle bore flow area; t-hydrogen temperature, 300K is taken;
p-nozzle inlet pressure; r is hydrogen gas constant, and 4124 is taken;
gamma-hydrogen specific heat ratio, 1.4; m is Mach number, and 1 is taken.
Furthermore, the material of each part in the hydrogen fuel injector is high-temperature alloy GH3030.
Furthermore, the welding mode is argon arc welding.
Further, the air flow channel 8 has a convergent-divergent profile, the diameters of the inlet cross section and the outlet cross section of the air flow channel 8 are equal, and the minimum cross-sectional area of the air flow channel 8 is 70% of the inlet and outlet cross-sectional areas.
Further, the distance between the inlet cross-section of the air flow channel 8 and the smallest cross-section of the air flow channel 8 is 40% of the length of the nozzle 6, and the distance between the outlet cross-section of the air flow channel 8 and the smallest cross-section of the air flow channel 8 is 60% of the length of the nozzle 6.
Furthermore, the injection holes 7 are circular holes with equal diameters, and the included angle between the axis of the circular holes and the central axis of the airflow channel 8 is 45 degrees.
Further, the length of the opening position of the injection hole 7 to the inlet cross section of the airflow channel 8 is 70% of the total length of the nozzle 6.
Although the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, and it can be fully applied to various fields of hypersonic combustion wind tunnels suitable for the present invention. It will be apparent to those skilled in the art that additional modifications and adaptations can be readily made without departing from the principles of the invention, and the invention is not limited to the specific details and illustrations set forth herein.
Claims (7)
1. A hydrogen fuel injector applied to the condition of high-temperature gas inflow is characterized in that the hydrogen fuel injector is positioned between an oxygen-enriched air supply cavity and a heater combustion chamber, the hydrogen fuel injector is of a concentric outer ring and inner disc structure, the outer ring is a gas collecting ring (1), and the inner disc is a nozzle disc;
the outer ring of the gas collecting ring (1) is welded with a plurality of high-pressure hydrogen supply pipelines which are uniformly distributed along the circumferential direction of the outer ring, and the high-pressure hydrogen supply pipelines are externally connected with a high-pressure hydrogen source; the inner ring of the gas collecting ring (1) is welded with a plurality of connecting pipes (2) which are uniformly distributed along the circumferential direction of the inner ring;
the nozzle plate is formed by combining and welding a front cover plate (3), a rear cover plate (4) and a plurality of nozzles (6) which penetrate through the front cover plate (3) and the rear cover plate (4) and are arranged in parallel front and back and have the same outer diameter;
the left side surface of the front cover plate (3) faces the outlet flange of the oxygen-enriched air supply cavity, and the left side surface of the front cover plate (3) is provided with a circular boss which is embedded into a matched circular groove with the same diameter on the outlet flange of the oxygen-enriched air supply cavity, so that the strength and the sealing property of a connecting position are ensured; the right side surface of the front cover plate (3) faces the left side surface of the rear cover plate (4), a circular groove is formed in the right side surface of the front cover plate (3) in an extending mode and used for being embedded into a matched circular boss with the same diameter on the left side surface of the rear cover plate (4), and therefore strength and sealing performance of a connecting position are guaranteed;
an air duct corresponding to the connecting pipe (2) is arranged in the rear cover plate (4); the vent pipe hole on the surface of the rear cover plate (4) is welded with the connecting pipe (2), so that hydrogen can enter the hydrogen gas collection cavity (5) through the connecting pipe (2) and the vent pipe hole; the left side surface of the rear cover plate (4) faces the right side surface of the front cover plate (3), and the left side surface of the rear cover plate (4) is provided with a circular boss which is embedded into a matched circular groove with the same diameter on the right side surface of the front cover plate (3), so that the strength and the sealing property of a connecting position are ensured; the right side surface of the rear cover plate (4) faces the combustion chamber inlet flange, and the right side surface of the rear cover plate (4) is provided with a circular boss which is embedded into a matched circular groove with the same diameter on the combustion chamber inlet flange, so that the strength and the sealing property of a connecting position are ensured;
the nozzle plate is provided with a plurality of conical through holes for mounting the nozzles (6), the left inner diameter of each conical through hole is larger than the right inner diameter, 1 conical through hole is positioned in the center of the nozzle plate, and the rest conical through holes are distributed in a centrosymmetric manner; 1 conical nozzle (6) is assembled in each conical through hole, and a plurality of injection holes (7) which are uniformly distributed are formed in the position, close to the right side surface of the rear cover plate (4), of each nozzle (6) along the circumferential direction; when the nozzle (6) is installed on the nozzle disc, the left side surface of the nozzle (6) is flush with the left side surface of the front cover plate (3), and the right side surface of the nozzle (6) is flush with the right side surface of the rear cover plate (4);
the inner surface of a nozzle disc formed by combining the front cover plate (3) and the rear cover plate (4) and the outer surface of a plurality of nozzles (6) installed on the conical through holes are used as boundaries to form a hydrogen gas collecting cavity (5);
high-pressure hydrogen of a high-pressure hydrogen source enters a gas collecting ring (1) from a high-pressure hydrogen supply pipeline, then sequentially enters a connecting pipe (2) and a hydrogen gas collecting cavity (5) along the gas collecting ring (1), enters an airflow channel (8) of a nozzle (6) from a jetting hole (7), and is mixed with high-temperature oxygen-enriched air entering from a high-temperature oxygen-enriched air supply cavity at the rear section of the airflow channel (8), in the mixing process, the hydrogen is spontaneously combusted in the high-temperature oxygen-enriched air to generate high-temperature fuel gas, and the high-temperature fuel gas is jetted from the nozzle (6);
the hydrogen flow rate of the single nozzle (6) is calculated by the formula:
wherein:
hydrogen flowKg/s; n is the number of injection holes of the nozzle;
A h -nozzle bore flow area; t is hydrogen temperature, and 300K is taken;
p-nozzle inlet pressure; r is hydrogen gas constant, and 4124 is taken;
gamma-hydrogen specific heat ratio, 1.4; m is Mach number, which is 1.
2. A hydrogen fuel injector as claimed in claim 1, wherein said components of said hydrogen fuel injector are made of high temperature alloy GH3030.
3. The hydrogen fuel injector as claimed in claim 1, wherein said welding is argon arc welding.
4. Hydrogen fuel injector for application in conditions of incoming flow of hot gases, in accordance with claim 1, characterized by the fact that said flow channel (8) has a convergent-divergent profile, the diameters of the inlet and outlet cross-sections of the flow channel (8) being equal, the minimum cross-sectional area of the flow channel (8) being 70% of the inlet and outlet cross-sectional areas.
5. Hydrogen fuel injector for high temperature gas inflow conditions according to claim 1, wherein the distance between the inlet cross section of the gas flow channel (8) and the smallest cross section of the gas flow channel (8) is 40% of the length of the nozzle (6), and the distance between the outlet cross section of the gas flow channel (8) and the smallest cross section of the gas flow channel (8) is 60% of the length of the nozzle (6).
6. The hydrogen fuel injector applied to the inflow condition of high-temperature gas as claimed in claim 1, wherein the injection holes (7) are circular holes with equal diameters, and the included angle between the axes of the circular holes and the central axis of the gas flow channel (8) is 45 degrees.
7. Hydrogen fuel injector for high temperature gas inflow conditions, according to claim 1, characterized in that the opening position of the injection hole (7) has a length of 70% of the total length of the nozzle (6) to the inlet cross section of the gas flow channel (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211106011.9A CN115575075A (en) | 2022-09-09 | 2022-09-09 | Hydrogen fuel injector applied to high-temperature gas inflow condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211106011.9A CN115575075A (en) | 2022-09-09 | 2022-09-09 | Hydrogen fuel injector applied to high-temperature gas inflow condition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116398899A (en) * | 2023-03-09 | 2023-07-07 | 中国空气动力研究与发展中心空天技术研究所 | Centrifugal air hydrogen torch igniter |
| CN116498896A (en) * | 2023-06-27 | 2023-07-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Fuel supply system of hypersonic high-temperature wind tunnel and design method thereof |
-
2022
- 2022-09-09 CN CN202211106011.9A patent/CN115575075A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116398899A (en) * | 2023-03-09 | 2023-07-07 | 中国空气动力研究与发展中心空天技术研究所 | Centrifugal air hydrogen torch igniter |
| CN116398899B (en) * | 2023-03-09 | 2024-04-26 | 中国空气动力研究与发展中心空天技术研究所 | Centrifugal air hydrogen torch igniter |
| CN116498896A (en) * | 2023-06-27 | 2023-07-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Fuel supply system of hypersonic high-temperature wind tunnel and design method thereof |
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