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

An engine and center body technology, applied in ramjet engines, combined engines, mechanical equipment, etc., can solve the problems affecting the overall performance of the engine, insufficient engine ramming effect, and low engine thrust performance, and achieve a wide and low flight Mach number range. , Improve thrust performance, compact structure

Active Publication Date: 2022-02-15
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
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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

Method used

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

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Embodiment Construction

[0028] specific implementation plan

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change a...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K7/18
Inventor 顾瑞孙明波蔡尊李佩波姚轶智
Owner NAT UNIV OF DEFENSE TECH
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