Air inlet channel of air-breathing type pulse detonation engine

Abstract

The invention discloses an air inlet channel of an air-breathing type pulse detonation engine. In the channel, an air inlet channel shell and a central body form an air inlet ring cavity; fuel oil is axially jetted from a nozzle of a rear end face of the central body to the air inlet channel; an air release hole groove is formed in an inlet of an air release tube facing the lower part of the air inlet channel on the air inlet channel shell; an actuating mechanism actuates back and forth along an axial direction in the air inlet channel; a plurality of rows of hole grooves are formed on the actuating mechanism; an actuating block is arranged on the actuating mechanism; and the hole grooves can be separately or simultaneously coincided with the air release hole grooves of the air inlet channel shell by axial actuation. The air inlet channel has the advantages of achieving smaller forward flow resistance under the condition of high-speed flight, simultaneously inhibiting and making use of a counter flow, improving the thrust force of the engine, increasing the air release speed, and improving the working frequency of the engine.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine intake duct. Background technique [0002] The pulse detonation engine is a new concept engine that uses intermittent or pulse detonation waves to generate thrust. Unlike the deflagration combustion in conventional engines (such as turbojet engines and piston engines, etc.), the combustion process in pulse detonation engines is detonation combustion. The difference between detonation and deflagration is that it has a high supercharging capacity. The pressure ratio before and after the detonation wave can reach 20-40 times in the mixture of air as the oxidant, and the strong shock wave generated will be reversed back to the intake air. Therefore, the detonation combustion chamber has high requirements on the intake port. [0003] To prevent detonation-induced flow oscillations from causing intake port failure, pulse detonation engines typically require an intake / detona...

AI Technical Summary

Problems solved by technology

[0004] To sum up, both the existing valved and valveless pulse detonation engines have disadvantages that cannot be ignored: the valve closure of valved pulse detonation engines will bring a large frontal area, resulting in great performance loss; The pneumatic valve of the pulse detonation engine has the problems of forward flow resistance and one-way control ability that cannot be well solved

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