Low-cost and simple unit round-to-square plug nozzle test device

A plug-type nozzle and test device technology, which is applied to jet propulsion devices, rocket engine devices, machines/engines, etc., can solve the problems of limited use of test pieces, long test preparation time, limited test tasks, etc., and achieves a simple structure. , The effect of low renewal cost and rich research content

Inactive Publication Date: 2012-12-12
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the work of experimental research is difficult, costly, and the test preparation time is long, and the experimental tas

Method used

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  • Low-cost and simple unit round-to-square plug nozzle test device
  • Low-cost and simple unit round-to-square plug nozzle test device
  • Low-cost and simple unit round-to-square plug nozzle test device

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with accompanying drawing.

[0046] The present invention is a low-cost simple unit round-rotating square plug nozzle test device, the present invention is a low-cost simple unit round-rotating square plug nozzle test device, such as figure 1 with figure 2 As shown, the test device mainly includes an igniter assembly 1 , an injector assembly 2 , a thrust chamber assembly 3 , a plug cone assembly 4 , a thrust measurement support bench assembly 5 and an ejector exhaust cylinder 6 .

[0047] The injector assembly 2 includes an injector barrel 201, an injector cover 202, an injector upper bottom 203 and an injector lower bottom 204, a gas-oxygen pipeline connector 205 and a gas-hydrogen pipeline connector 206, such as image 3 shown. Among them, the upper end of the injection cylinder 201 is welded with a conical injector cover 202, and the inside of the injection cylinder 201 is coaxially welded with a...

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Abstract

The invention discloses a low-cost and simple unit round-to-square plug nozzle test device, which comprises an igniter assembly, an injector assembly, a thrust chamber assembly, a plug cone assembly, a thrust measuring support table frame assembly and an ejection exhaust tube, wherein the injector assembly is provided with a hydrogen cavity and an oxygen cavity, a hydrogen and oxygen gas direct flow spray nozzle with the single hydrogen and oxygen injection function is arranged in the hydrogen cavity, the igniter assembly formed by three layers of sleeves is arranged inside the injector assembly, the injector assembly is connected with the thrust chamber assembly with a round-to-square inner nozzle, the plug cone assembly and the thrust chamber assembly are connected, are supported by the thrust measuring support table frame assembly and can forwards and backwards slide on the support table frame assembly, a platform with an installing thrust frame is also arranged on the support table frame assembly, and the back part of the plug cone is positioned in the ejection exhaust tube. The low-cost and simple unit round-to-square plug nozzle test device has the advantages that the structure is simple, the measurement precision is high, the cost is low, in addition, the application range is wide, the study content is rich, and the repeated use for many times can be realized.

Description

technical field [0001] The invention relates to the technical field of aerospace engine testing, in particular to a low-cost, simple-structure unit circular-rotary square-plug nozzle test device. Background technique [0002] Improving nozzle efficiency and reducing nozzle weight are the main goals of rocket engine design. Because aerospace vehicles have to experience different flight altitudes during flight, the traditional bell nozzle can only achieve the best performance at the design altitude, and higher or lower design altitudes will cause a certain performance loss, that is, under-expansion loss or overexpansion loss. Due to the open flow structure on the outside of the pneumatic plug nozzle, the gas is connected to the ambient pressure on one side, and the expansion state is automatically adjusted under the influence of the environmental back pressure. The gas is in a fully or nearly fully expanded state at the entire flight height. High performance with automatic c...

Claims

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Application Information

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IPC IPC(8): F02K9/96F02K9/97
Inventor 王一白程诚刘达伟覃粒子刘宇
Owner BEIHANG UNIV
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