Cooling scheme for combustion chamber wall surface of aspirated type pulse detonation engine

Abstract

The invention provides a cooling scheme for the combustion chamber wall surface of an aspirated type pulse detonation engine. Low-temperature gas of a gas inlet channel is used as a medium, and according to the characteristics of the different temperature of a DDT section and a detonation propagation section of the pulse detonation engine, a zonal cooling method is adopted to cool the combustion chamber wall surface of the aspirated type pulse detonation engine. A shock / sweat combined type cooling method is provided to cool the DDT section with higher temperature in the combustion chamber, thedetonation propagation section with relatively lower temperature is cooled through a method of convective heat exchanging in a channel, and the method of convective heat exchanging in the channel issimple in structure. The thrust of the engine can be improved by making full use of the cooling medium while without carrying an additional cold source. According to the cooling scheme for the combustion chamber wall surface of the aspirated type pulse detonation engine, the problem of uneven temperature distribution caused by existing cooling methods is solved, and the combustion chamber wall surface temperature of the pulse detonation engine is significantly reduced.

Description

technical field [0001] The invention relates to the technical field of pulse detonation engines, in particular to a cooling solution for the combustion chamber wall of an air-breathing pulse detonation engine. Background technique [0002] Pulse Detonation Engine (PDE) is an unsteady propulsion device based on multi-cycle detonation combustion mode. Because the detonation combustion process is similar to the constant volume combustion process, the pulse detonation engine has a higher cycle thermal efficiency than the conventional isobaric combustion engine; on the other hand, the pulse detonation engine can provide a higher pressure ratio, through the Boost to increase the temperature and pressure of the combustible mixture. The pressure of the fuel and oxidant injected into the combustion chamber is relatively low. Compared with the conventional power plant, the complex rotary supercharging parts are omitted, and the structure is simpler, so it can provide a higher thrust-...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the thermal fatigue of the combustion chamber wall of an air-breathing pulse detonation engine and the lack of existing cooling methods, the present invention provides a cooling scheme for the combustion chamber wall of a pulse detonation engine

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