Combustion drag reduction method and device applied to scramjet engine

A scramjet and engine technology, applied in ramjet engines, combustion methods, engine components, etc., can solve the problems of fuel flameout in the engine, affecting the normal use of the engine, etc., to reduce frictional resistance and reduce frictional resistance. Effect
CN112377323AActive Publication Date: 2021-02-19CHINA AERODYNAMICS RES & DEV CENT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA AERODYNAMICS RES & DEV CENT
Publication Date
2021-02-19

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Abstract

The invention relates to the technical field of scramjet engines, and discloses a combustion drag reduction method and device applied to a scramjet engine. Gaseous hydrogen fuel is injected into a concave cavity of a flame stabilizer of the scramjet engine, and forced ignition is achieved through a spark plug, so that the fuel is stably combusted. The flow structure of the scramjet engine is changed through fuel combustion, so that the speed near the wall surface of the scramjet engine is reduced, the speed gradient near the wall surface of the engine is reduced, and the frictional drag of thescramjet engine is reduced. Different from a traditional combustion drag reduction mechanism, the flow structure of the scramjet engine is changed, so that the speed gradient near the wall surface ofthe engine is reduced, and then the friction drag of the engine is reduced. The common understanding of the combustion drag reduction mechanism at present is changed through the method, and the combustion drag reduction mechanism is enriched and perfected.
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Description

technical field

[0001] The invention relates to the technical field of scramjet engines, in particular to a method and device for reducing combustion resistance of scramjet engines. Background technique

[0002] Scramjet is the preferred propulsion system for hypersonic vehicles, especially at hypersonic cruise (Ma>5), it exhibits good specific impulse performance. Therefore, researchers around the world are still continuing to carry out research on scramjet related technologies, especially to improve the propulsion performance of scramjet and reduce the resistance of scramjet.

[0003] There are many research aspects in the research of reducing resistance. The study found that the combustion of hydrogen fuel in the boundary layer near the wall can reduce the frictional resistance of the wall, and pointed out that the principle is due to the effect of film cooling (film cooling), that is: injected hydrogen The density is very low, which reduces the airflow density in the...

Claims

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