Multi-stage rotary detonation rocket ramjet combined engine

Abstract

The invention discloses a multi-stage rotary detonation rocket ramjet combined engine, and belongs to the field of combined engines. The combined engine comprises a ramjet engine, and a multi-stage rotary detonation rocket engine embedded between an air inlet channel and a combustion chamber of the ramjet engine, wherein the multi-stage rotary detonation rocket engine comprises a plurality of single-stage rotary detonation rocket engines distributed in a stepped mode, and thrust is provided in a rotary detonation combustion mode; and according to the whole engine system, the ramjet engine and the multi-stage rotary detonation rocket engine jointly generate thrust. Compared with a single-stage rotary detonation structure, the multi-stage rotary detonation structure can enable multi-stage rotary detonation to jointly generate an ejection and suction combination in a rocket ejection mode with a low Mach number, and the low-speed ejection pressurization efficiency is improved; in a subsonic combustion and scramjet mode, the positions of induced flames and a flame stable area can be adjusted, the working stability of the engine is improved, meanwhile, a larger thrust range can be provided, thrust adjustment is more flexible, and the thrust performance is improved.

Description

technical field [0001] The invention belongs to the technical field of combined engines, and more specifically relates to a multi-stage rotary detonation rocket ramjet combination engine. Background technique [0002] With the development of aerospace technology, human exploration in the field of outer space continues to increase, and the concept of various new aerospace vehicles has sprung up, which is more and more important for improving the propulsion power of the aircraft and improving the structure of the engine to adapt to the flight of a wider speed range. higher demand. [0003] There are many deficiencies or limitations in a single engine for working in a wide speed range, and combined cycle engines such as TBCC, RBCC, T-RBCC, and SABER have evolved. The combined engine is an engine combined with two or more engines with different working principles (different types), and it is suitable for aircraft with a wide flight speed range and large altitude changes. figur...

AI Technical Summary

Problems solved by technology

[0005] Among them, the traditional RBCC engine has the following problems: in the injection mode (below Ma2), the thrust gain is small, the specific impulse is low, and the air suction volume may be faced Insufficient and low ejection efficiency; in the sub-combustion and scramjet modes, the RBCC engine may face the problem of insufficient thrust

Images