Fuel combined injection structure based on wedge-shaped body

Abstract

The invention discloses a fuel combined injection structure based on a wedge-shaped body, and specifically relates to the technical field of scramjet engines. The fuel combined injection structure based on the wedge-shaped body comprises wedge-shaped bodies, a plurality of the wedge-shaped bodies are equally distributed in a width direction of a scramjet combustion chamber at intervals, the cross-sectional shapes of the wedge-shaped bodies are triangle, the sides of the wedge-shaped bodies with small cross-sectional areas face the upstream of the combustion chamber, elliptical injection holesare formed in leeward sides of the wedge-shaped bodies, injection passages communicating with the elliptical injection holes are arranged in the wedge-shaped bodies, and circular nozzle holes are formed in the wall of the combustion chamber at the leeward sides of the wedge-shaped bodies. The technical scheme provided by the invention solves the problem of fuel diffusion and mixing of the larger-scale scramjet engine, and alleviates the large total pressure loss and difficult thermal protection caused by the existing intrusive scramjet engine injection structure to a certain extent, and the fuel combined injection structure can be used for fuel injection of the scramjet engine.

Description

technical field [0001] The invention relates to the technical field of a scramjet engine, in particular to a fuel combination injection structure based on a wedge. Background technique [0002] As a propulsion power device, the scramjet can economically and reliably achieve the goal of hypersonic flight. A scramjet generally includes components such as an intake port, an isolation section, a combustion chamber, and an exhaust nozzle. [0003] The function of the combustion chamber is to realize fuel injection, ignition and combustion. The existing fuel injection methods can be divided into two categories according to the different injection positions: wall injection and intrusive injection. Wall injection generally uses small holes arranged in the wall of the engine to inject fuel into the combustion chamber. The intrusive injection often uses devices such as struts and support plates to inject fuel from the middle of the flow channel of the combustion chamber. [0004] ...

AI Technical Summary

Problems solved by technology

[0007] The present invention intends to provide a wedge-based fuel combination injection structure to solve the problem of fuel diffusion and mixing in larger-scale scramjet engines, and to a certain extent relieve the existing intrusive scramjet injection The problems of large total pressure loss and difficult thermal protection caused by the structure

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