Detonation chamber of pulse detonation engine

Abstract

The invention relates to a detonation chamber of a pulse detonation engine, which is characterized in that a plurality of detonation enhancing devices are arranged on the inner wall of an engine, and a distance between every two detonation enhancing devices is 0.5-1 time of the inner diameter of the inner wall of the engine. Each detonation enhancing device comprises a contraction section, a fixing rib and a flow guiding section. The contraction section forming a gradually contracted flow channel is arranged along the air inlet direction and then in linkage with the flow guiding section. Compared with a common Schelkin spirally-mutational flow channel, the forward direction flow losses are small, the forward direction flow losses in the detonation chamber is reduced, and the detonation waves can be formed in a short distance. The detonation enhancing devices are not easily ablated, and the service life of the detonation chamber can be effectively improved. Traditional Schelkin spirals are connected with the engine in a welding mode. When the engine works at high frequency, the temperature in the detonation chamber is high, and welding spots are easily ablated to enable the Schelkin spiral to be invalid.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a pulse detonation engine detonation chamber. Background technique [0002] The pulse detonation engine is a new concept propulsion device that uses high-temperature, high-pressure gas generated by intermittent detonation waves to generate thrust. Pulse detonation engines can be divided into rocket type and air-breathing type according to whether they have their own oxidant. [0003] There are two ways of detonation detonation, namely direct detonation and indirect detonation. The former requires a huge ignition energy, and the latter forms a detonation wave through the deflagration-to-detonation transition (DDT). Considering the practicality, the pulse detonation engine generally adopts the way of indirect detonation to obtain the detonation wave. Specifically, a small ignition energy is used to form a slow combustion wave, and then the detonation wave is finally formed throu...

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Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes a pulse detonation engine detonation chamber to improve the large flow resistance loss, easy ablation and air-breathing pulse detonation engine detonation of the detonation chamber in the prior art The problem that the chamber cannot effectively reduce the pressure of the reverse gas

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