Wedge surface structure for using local large-angle wedge surface to control oblique detonation wave

Abstract

The invention belongs to the field of oblique detonation engines, and particularly relates to a wedge surface structure for using a local large-angle wedge surface to control an oblique detonation wave. The wedge surface structure adds the local large-angle wedge surface on the basis of an original straight wedge surface. The local large-angle wedge surface induces a stronger oblique shock wave, provides higher temperature rise, and can stabilize the oblique detonation wave on the local large-angle wedge surface. In the actual flight process, the angles of a front wedge surface and a rear wedge surface and the position of the local large-angle wedge surface can be changed according to actual needs, so as to precisely control the initiation position of the oblique detonation wave. The structure can control the detonation position of the oblique detonation wave according to actual flight conditions, thereby realizing the maximization of thrust.

Description

Technical field [0001] The invention belongs to the field of oblique detonation engines, and specifically relates to a wedge surface structure that uses a local large-angle wedge surface to control an oblique detonation wave. Background technique [0002] The oblique detonation engine is the most ideal engine for hypersonic aircraft. The working principle of the oblique detonation engine is: the supersonic flow impinges and compresses on the wedge surface to form an oblique shock wave. After the oblique shock wave, the temperature and pressure increase and the speed decreases. After a period of induction, the oblique detonation wave is detonated. [0003] According to the working characteristics of the oblique detonation engine, it can be known that the wedge angle cannot be too large. An excessively large wedge angle will cause the mixture to dissociate prematurely and affect the thrust performance. At the same time, an excessively large wedge angle will increase the resistance; ...

AI Technical Summary

Problems solved by technology

[0003] According to the working characteristics of the oblique detonation engine, it can be known that the wedge angle should not be too large. Too large wedge angle will cause the mixture to dissociate prematurely and affect the thrust performance. At the same time, too large wedge angle will increase the resistance; wedge angle It cannot be too small, because the smaller the wedge angle, the lower the static temperature after the oblique shock wave, and the longer the induced length, which will increase the size of the engine and increase the weight of the engine

If a flat wedge is used, it is difficult to control the detonation wave by changing the angle of the wedge

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