Short-distance compact ignition initiation device for continuous rotating detonation engine

Abstract

The invention discloses a short-distance compact ignition detonation device for a continuous rotating detonation engine, and belongs to the technical field of gas turbine engines. According to the device, pre-detonation tubes are compactly arranged in a tube bending mode, the flame in the pre-explosion tubes is developed into a detonation wave after an igniter is ignited, and the axial length is reduced under the condition that high-temperature and high-pressure outlets are guaranteed; and meanwhile the pre-explosion tubes are arranged in an internal idle space of the continuous rotating detonation engine, the overall occupied space of the continuous rotating detonation engine can be reduced, and an idea is provided for the ignition detonation of the continuous rotating detonation engine.The device is mainly applied to the field of continuous rotating detonation engines, and the problems that for the continuous rotating detonation engine, the energy required by the direct ignition detonation is large, the ignition detonation occupation space of a traditional straight tube arrangement is large and resistance loss is large can be effectively solved, and meanwhile, the principle of the device can be applied to other types of engines, and the similar purposes can be achieved.

Description

technical field [0001] The patent of the invention relates to a short-distance compact ignition and detonation device for a continuously rotating detonation engine, which belongs to the technical field of gas turbine engines. Background technique [0002] Continuous Rotating Detonation Engine (CRDE for short) is an engine that uses rotating detonation waves to continuously rotate and propagate in an annular combustion chamber to generate thrust. The basic principle is that the combustible reactants are injected into the annular combustion chamber through the micro-nozzle arranged in the ring. When detonation occurs somewhere, the combustion wave gradually develops into a rotating detonation wave along the circumferential direction. At the position of the rotating detonation wave, there is high temperature and high pressure, and the nearby intake nozzle cannot enter the fuel; when the rotating detonation wave propagates to other positions, due to the exhaust The air reduces ...

AI Technical Summary

Problems solved by technology

The feature of this invention is that it can detonate the rotary detonation wave engine in one direction, and the rotation propagation of the detonation wave in the combustion chamber is not affected during the normal operation of the engine, and the problem of restarting the engine is overcome, but the device increases the overall structure of the engine, and in actual use Medium space utilization is not high

Patent "a rotating detonation combustion chamber", patent publication number: CN104154567B, this invention discloses a new type of combustion chamber design that can make the rotating detonation wave fill the entire annular cavity, and strengthen the detonation by attaching spiral obstacles in the model. shock wave and can make the combustion process more stable, but the addition of additional devices will complicate the overall structure and reduce the specific impulse of the engine

Patent "a rotary detonation gas turbine", patent publication number: CN104153884A, the invention discloses a device using a rotary detonation engine combined with a turbine. The detonation engine and the existing gas turbine take advantage of the higher thermal cycle of the detonation, and then add the gas turbine to generate electricity or increase the shaft work output. The device uses a spark plug to ignite. The structure is simple, but the actual ignition is difficult and difficult. Generate a rotating detonation wave

[0004] The continuous rotating detonation engine needs to quickly form a rotating detonation wave when it is detonated, which requires a higher ignition energy; the rotating detonation wave formed after ignition propagates in one direction and cannot collide with the detonation wave, so the ignition angle needs to be considered; at the same time, the traditional ignition The length of the pre-explosion tube used is long, it is difficult to be used in the actual engine, and it is hoped that the space occupied by the ignition device is small

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