A Short-Range Compact Ignition Initiator for Continuously Rotating Detonation Engines

Abstract

The invention discloses a short-distance compact ignition and detonation device for a continuously rotating detonation engine, which belongs to the technical field of gas turbine engines. The device adopts the bent tube method to compactly arrange the pre-detonation tube. After the igniter is ignited, the flame in the pre-detonation tube develops into a detonation wave, which reduces the axial length while ensuring the high temperature and high pressure of the outlet; at the same time, the pre-detonation tube is arranged in a continuous rotation The idle space inside the detonation engine can reduce the overall space occupied by the continuous rotation detonation engine, and provide ideas for the ignition and detonation of the continuous rotation detonation engine. The invention is mainly used in the field of continuous rotary detonation engines, and can effectively solve the problems of large energy required for direct ignition and detonation of continuous rotary detonation engines, large space occupied by traditional straight tube arrangement for ignition and detonation, and large resistance loss. At the same time, its principle It can also be applied to other types of engines to achieve similar purposes.

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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