A rocket ramjet wide-velocity engine based on annular pressurized center body trailing edge expansion

Abstract

A rocket ramjet wide-velocity engine based on annular pressurized center body trailing edge expansion, including inlet, center body, rocket, concave cavity combustion chamber and nozzle, the engine can use the rocket in the annular mixing section at low flight Mach number The air is pressurized, and the cross-section design is adopted at the rear edge of the center body, which reduces the structural scale of the rocket ramjet and improves the thrust-to-weight ratio performance of the engine. Using the high-temperature and high-pressure gas of the rocket, the rapid mixing of rocket gas and air is promoted in the annular mixing channel, which effectively shortens the mixing distance. The structural scale improves the overall thrust performance of the engine.

Description

technical field

[0001] The invention relates to the technical field of engines, in particular to a rocket ramjet wide-speed range engine that can work reliably at a wide flight Mach number. Background technique

[0002] The speed range of the engine is an important design index of the engine. A wide speed range means a wider application range of the engine. The larger the flight envelope range, the more practical the engine and the wider the application prospect. Conventional ramjet engines rely solely on the effect of air ramjet, so when the flight speed is low, the ramjet effect of the engine is not enough, and the thrust performance of the engine is low. Conventional rocket ramjet engines require a long mixing section, so the weight of the engine is relatively large, and the thrust-to-weight ratio of the engine is low. When the Mach number is high, the length of the mixing section that is too long greatly affects the overall performance of the engine. Contents of the in...

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