Flexible extension effuser with self-adaption height

An extended nozzle and self-adaptive technology, which is applied in the direction of jet propulsion devices, rocket engine devices, machines/engines, etc., can solve the problems of low working efficiency of rockets, achieve the effect of continuous inner surface, eliminate side effects, and shorten the length

Active Publication Date: 2019-12-20
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low working efficiency of rockets with a wide range of work, such as single-stage orbital rockets, and provide a flexible extension nozzle with an adaptive height that can change the area ratio with the working height

Method used

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  • Flexible extension effuser with self-adaption height
  • Flexible extension effuser with self-adaption height
  • Flexible extension effuser with self-adaption height

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Embodiment Construction

[0030] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the present invention will be further described below in conjunction with the accompanying drawings:

[0031] The technical solution of the present invention is achieved in this way: a flexible extension nozzle with self-adaptive height comprises a fixed section, a flexible extension section, a variable constraint point and a deployment device. The nozzle is designed as a multi-bell shape, and can Expand the extension according to the flight altitude. After the nozzle is deployed, the internal surface is multi-bell-shaped, and the characteristic line of each extension section adopts a polynomial curve or a B-spline curve, etc., and is in a fully expanded state at the outlet of each section. The flexible extension nozzle can be expanded in multiple stages, and the expansion ratio of the nozzle can be increased from a dozen to several hundreds. ...

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Abstract

The invention relates to the technical field of rocket engines, particularly to a flexible extension effuser with self-adaption height, which includes a basic bell-shaped effuser part, a multi-stage bell-shaped extension part, a variable constrained point part and a support structure part, wherein part of the basic bell-shaped effuser part is a fixed effuser, one end of the fixed effuser is connected with a rocket engine, and one end is connected with the multi-grade bell-shaped extension part; the multi-grade bell-shaped extension part is a flexible extension effuser, is in a rolling state when in the launching initial state, and is unfolded along with the increase of flying height; the variable constrained point part is positioned on the flexible extension effuser, and is fixed to a setposition of the support structure part; the support structure part is positioned inside the flexible extension effuser, and is unfolded along with the increase of flying height. According to the flexible extension effuser, the current problem of low working efficiency of rockets with wide operation range, such as single-stage orbit rockets is solved, the air flow is kept fully expanded all the time, so that the rocket is in the optimal operation state at any height.

Description

technical field [0001] The invention relates to the technical field of rocket engines, in particular to a flexible extension nozzle with adaptive height. Background technique [0002] Since the payload of the launch vehicle is limited by the performance of the engine, people have never stopped research on improving the performance of the engine. There are two main research directions. One is to increase the thrust of the engine by increasing the specific impulse of the propellant; Structural research, such as designing a nozzle with a larger expansion ratio, etc., in recent years, the structural research has obvious benefits is the extension of the nozzle. [0003] At present, the existing double-bell-shaped nozzle has a simple structure, but it can only perform height compensation for two working states, and the profile changes discontinuously. The profile of the plug nozzle changes continuously, but it is difficult to design a complex structure. The forced deflection noz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K9/97
CPCF02K9/97
Inventor 王革苏成志谭敦煌李德坚李冬冬陈磊王英男周凌陈成文
Owner HARBIN ENG UNIV
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