A Flexible Extended Nozzle with Adaptive Height

An extension nozzle, self-adaptive technology, applied in the directions of jet propulsion, machine/engine, rocket engine, etc., can solve the problem of low rocket work efficiency, maximize the height compensation effect, continuous inner surface, and eliminate side effects Effect

Active Publication Date: 2022-03-18
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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  • A Flexible Extended Nozzle with Adaptive Height
  • A Flexible Extended Nozzle with Adaptive Height
  • A Flexible Extended Nozzle with Adaptive 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, in particular to a flexible extension nozzle with adaptive height. It includes the bell-shaped nozzle part of the basic section, the multi-stage bell-shaped extension section, the variable constraint point part and the supporting structure part; among them, the bell-shaped nozzle part of the basic section is a fixed nozzle, one end of which is connected to the rocket engine, and one end It is connected to the multi-stage bell-shaped extension section; the multi-stage bell-shaped extension section is a flexible extension nozzle, which is rolled up when it is in the initial state of launch, and then unfolded as the flight height increases; the variable restraint point part is located in the flexible extension On the nozzle, the support structure part is fixed to reach the predetermined position; the support structure part is located inside the flexible extension nozzle and expands as the flight height rises. The invention can solve the problem of low working efficiency of rockets with a wide working range, such as single-stage orbiting rockets, so that the airflow can always keep fully expanded and be in the best working 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 Patents(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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