Initiating devices for detonation combustion chambers

Abstract

The invention discloses a detonation device for a detonation combustion chamber. The device comprises an outer lining, an inner lining, an annular flame generator and a fire retardant ring, wherein the outer lining is cylindrical, one end of the outer lining is welded and fixed to a flange, the other end of the outer lining is closed by a concave focusing cavity, flame holes are uniformly formed in the axial direction and the circumferential direction of the outer lining, and a plurality of circles of flame holes are formed in the axial direction at intervals; the inner lining is coaxial withthe outer lining, the end, close to the focusing cavity of the outer lining, of the inner lining is opened, the other end of the inner lining leads to the combustion chamber, and the outer wall, closeto the other end of the inner lining, of the inner lining is welded and fixed to the flange; the annular flame generator surrounds the outer side of the outer lining, a hollow ring is formed in the flame generator, the hollow part communicates with one circle of flame holes in the outer lining, the surface of the outer side of the flame generator is provided with a spark plug connecting hole, andsmall holes are evenly formed in the inner wall surface in the circumferential direction; the fire retardant ring surrounds the outer side of the outer lining and used for plugging the remaining flame holes in the outer lining; and the position of the annular flame generator and the position of the fire retardant ring are adjustable. According to the technical scheme, the energy consumption required by detonation triggering is reduced, and the time and distance required for detonation are effectively shortened.

Description

technical field [0001] The invention relates to the field of detonation initiation, in particular to an initiation device for a detonation combustion chamber. Background technique [0002] For engines based on detonation combustion, whether it is a pulse detonation engine (Pulse Detonation Engine, PDE) or a rotating detonation engine (Rotating Detonation Engine, RDE), the key to achieving detonation combustion is how to trigger the detonation wave. At present, there are many ways of ignition detonation, such as laser initiation, high energy initiation, plasma initiation, spark plug initiation and so on. According to the trigger energy, it can be divided into two categories: direct detonation and indirect detonation. [0003] Among them, the energy consumption of direct detonation is huge, and the performance of the igniter is extremely high, so the engineering application is difficult. In contrast, indirect detonation can trigger detonation waves with low energy consumptio...

AI Technical Summary

Problems solved by technology

This length is often difficult to match to the engine for lower active fuels

Secondly, once the detonator structure is determined, the deflagration to detonation will be formed spontaneously, and effective control cannot be achieved.

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