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

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...

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 tasks completed by the test piece are limited, especially for the engine heat flow test, the number of use of the test piece is limited

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