A ramjet wide-velocity engine based on an annular supercharged center body confluence rocket ramjet

Abstract

A rocket ramjet wide-velocity range engine based on an annular pressurized center body tail confluence rocket, the engine includes a center body, an air inlet, a concave cavity combustion chamber and a nozzle. The embedded rocket in the conventional rocket ramjet is put forward to the outside of the center body, and the rocket and air are mixed in the annular mixing channel. Since the contact area between the rocket jet and the air increases, the mixing distance of the two airflows can be effectively shortened , at the same time, the annular airflow is transformed into a central pipe flow through the central body convergence section at the nozzle, which can reduce the outlet area of ​​the engine nozzle, thereby reducing the structural scale of the engine. Adopting this scheme can effectively improve the thrust performance of the rocket ramjet as a whole.

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...

AI Technical Summary

Problems solved by technology

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

The conventional rocket ramjet engine needs a long mixing section, so the engine weight is relatively large, and the thrust-to-weight ratio of the engine is low. At a high Mach number, the excessive length of the mixing section greatly affects the overall performance of the engine

Images