A rotary detonation combustor

Abstract

The invention discloses a rotary detonation combustion chamber, which comprises an inlet injection device, a main annular chamber of the combustion chamber formed by inner and outer cylinders sleeved together, an ignition device, a first-stage split channel and a second-stage split channel, the inlet The injection device is arranged at one end of the main annular chamber of the combustion chamber for injecting the fuel mixture; the ignition device is arranged in the main annular chamber of the combustion chamber and is located downstream of the inlet injection device, corresponding to the injection device one by one, and the one The primary flow distribution channel and the secondary flow distribution channel are arranged downstream of the main annular cavity of the combustion chamber and communicate with the main annular cavity of the combustion chamber, and the primary flow distribution channel communicates with the secondary flow distribution channel. The present invention is provided with a multi-stage shunt passage at the outlet position, so that part of the detonation products pass through the noise reduction device of the shunt passage, so as to reduce the noise of the engine while controlling the pressure loss at the outlet within an acceptable range.

Description

technical field [0001] The invention belongs to the technical field of engines, in particular to a rotary detonation combustion chamber. Background technique [0002] The rotary detonation combustion chamber is an annular combustion chamber powered by detonation combustion. The fuel is jointly supplied by multiple nozzles at the head of the combustion chamber. The premixed fuel is ignited through the pre-detonation tube. When working, it is close to the combustion chamber head One or more detonation waves rotating in the circumferential direction are formed in the annular cavity at an axial distance from the center, so the uniformity of the injection fuel mixing is put forward very high requirements, and in the vicinity of the combustion chamber outlet position, the detonation wave degenerates into a series of weak compression waves. Since the propagation velocity of the detonation wave is in the order of 103m / s, the pressure near the outlet of the combustion chamber is ver...

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Problems solved by technology

[0003] The purpose of the present invention is to improve a rotary detonation combustor, so as to solve the problems in the existing rotary detonation combustor, such as low degree of fuel mixing uniformity, high noise at the exit of the combustor, etc.

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