Fuel supply system and supply method for high-speed air-breathing engine

Abstract

The invention relates to a fuel supply system and supply method for a high-speed air-breathing engine. The fuel supply system and supply method aim to overcome the technical problems of poor selectivity and low chemical heat sink in the fuel cracking process of an existing engine. The supply system comprises a fuel storage tank, an electric heating device, a conveying pipeline, a distribution pipeline, a plurality of injectors, a gas cylinder, a pressure reducing valve and a control unit. The fuel storage tank is arranged at the heat exchange face of a heat exchange channel of the high-speed air-breathing engine, and solid fuel is stored in the fuel storage tank. An outlet of the gas cylinder is connected with the fuel storage tank through the pressure reducing valve. The electric heatingdevice is used for heating the fuel storage tank. Outlets of the injectors face the interior of a combustion chamber. An inlet of the conveying pipeline is connected with an outlet of the fuel storagetank, an outlet of the conveying pipeline is connected with an inlet of the heat exchange channel, and an electromagnetic valve is arranged on the conveying pipeline. The distribution pipeline comprises a main pipeline body, a plurality of branch pipeline bodies and a fuel distribution valve, wherein an inlet of the main pipeline is connected with an outlet of the heat exchange channel.

Description

technical field [0001] The invention belongs to the field of rocket ramjet combined engines, and in particular relates to a fuel supply system and a supply method of a high-speed air-breathing engine. Background technique [0002] Hypersonic air-breathing engines such as scramjet engines and RBCC engines work under hypersonic flow conditions, and combustion organization and thermal protection are their core key technologies. The Mach number of the airflow in the combustion chamber 12 of the engine is relatively large, and the combustion organization is difficult. It is necessary to realize the efficient heat release of the fuel within the limited length of the combustion chamber 12, which requires that the fuel entering the combustion chamber 12 should have a short ignition delay time and a flame propagation velocity. Fast, low self-ignition characteristics. In addition, hypersonic air-breathing engines are subjected to a very harsh thermal environment, and active fuel cool...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the technical problems of low selectivity and low chemical heat sink in the existing engine fuel cracking process, the present invention provides a fuel supply system and supply method for high-speed air-breathing engines

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