Rocket ramjet wide-speed-range engine based on annular pressurization center body tail confluence

A center body and engine technology, applied in ramjet engines, combined engines, mechanical equipment, etc., can solve problems such as low engine thrust performance, affecting the overall performance of the engine, and insufficient engine ramming effect

Active Publication Date: 2021-04-20
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 need

Method used

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  • Rocket ramjet wide-speed-range engine based on annular pressurization center body tail confluence

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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

The invention discloses a rocket ramjet wide-speed-range engine based on annular pressurization center body tail confluence. The engine comprises a center body, an air inlet channel, a combustion chamber with a concave cavity and a spray pipe. An embedded rocket in a conventional rocket ramjet engine is arranged on the outer side of the center body, the rocket gas and air are mixed in an annular mixing channel, and the contact area of rocket jet flow and the air is increased, so that the mixing distance of two air flows can be effectively shortened. Meanwhile, annular airflow is converted into central pipe flow through a central body contraction section at the spray pipe, the outlet area of the engine spray pipe can be reduced, and therefore the structural size of the engine is reduced, and the overall thrust performance of the rocket ramjet engine can be effectively improved by adopting the scheme.

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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IPC IPC(8): F02K7/18
Inventor 孙明波顾瑞蔡尊李佩波姚轶智
Owner NAT UNIV OF DEFENSE TECH
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