Ejector rocket for rocket-based combined cycle engine

Abstract

The invention provides an ejector rocket for rocket-based combined cycle engine. The ejector rocket includes a jet pipe. The jet pipe is a plug type jet pipe. According to the invention, in the ejector rocket, the plug type jet pipe is adopted instead of a conical or bell-shaped jet pipe in the prior art so as to improve the pressure at the bottom of the jet pipe of the ejector rocket in a stamping mode and reduce the bottom resistance. Therefore, a recirculation zone at the bottom of the ejector rocket is reduced and the total pressure loss is reduced. Meanwhile, in the stamping mode, the plug type jet pipe can reduce the area of a high temperature zone and reduce thermal protection requirements.

Description

technical field [0001] The invention relates to the technical field of rocket-based combined cycle engines, in particular to an ejector rocket applied to rocket-based combined cycle engines. Background technique [0002] At present, rocket based combined cycle (Rocket Based Combined Cycle, RBCC) engines mostly use ejector rockets with conical or bell-shaped nozzles. The ejection rocket is an important part of the rocket-based combined cycle engine, and it is the main source of engine thrust in the ejection mode (when the flight Mach number is less than 3). [0003] In order to ensure that sufficient power can be provided for the aircraft, the size of the launch rocket is relatively large, which can account for more than 40% of the total cross-sectional area of ​​the runner. However, as the flight Mach number increases, when the engine enters the ramming mode, it is necessary to turn off the ejector rocket to improve the overall specific impulse performance of the engine. ...

AI Technical Summary

Problems solved by technology

However, due to the limited fuel carried by the aircraft, active cooling may be difficult to meet the thermal protection requirements when the flight Mach number is high or the nozzle surface area is large

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