Six-unit tile-shaped plug nozzle cold flow test device

Abstract

The invention provides a six-unit tile-shaped plug nozzle cold flow test device, which comprises a plug cone, a six-unit inner nozzle plug nozzle assembly, a plug block, combustion chamber assemblies and a measuring assembly, wherein the plug block and unit inner nozzles have the same appearance and size, the molded surface structures of the left side and the right side of the plug cone are symmetrical, the molded surfaces are integrally processed, a row of round holes are processed at each side and are used for assembling the unit inner nozzles, all outlets of the assembled unit inner nozzles are in lap joint with the tile-shaped curved surface of the plug cone, the opening parts of the three unit inner nozzles positioned at the same side of the plug cone are provided with the combustion chamber assembly. In the test process, the unit inner nozzle is replaced into the plug block according to test requirements. The invention provides the compression ratio straight-line tile-shaped plug nozzle cold flow test device with multifunction, simple structure and lower cost, different test requirements are met, the height compensation characteristic of the plug nozzle and the influence of relevant structure factors on the height compensation characteristic can be studied, and the like.

Description

technical field [0001] The invention relates to the technical field of aerospace engine testing, in particular to a multifunctional six-unit "tile"-shaped plug nozzle cold flow test device. Background technique [0002] The nozzle is an important part of the aerospace propulsion system. The traditional nozzle is generally a bell-shaped or cone-shaped structure with a fixed area ratio, and only has a high thrust performance at the design point. With the development of aerospace technology, all kinds of new concept engines hope to further improve the performance. It is an effective technical way to obtain higher performance of the nozzle at the height of the non-design point, and the design of the plug nozzle is suitable for Developed for this requirement, its height compensation feature makes it especially suitable for high-altitude working environments that require a large range of nozzle area ratio or a large area ratio. The reusable vehicle based on the plug-type nozzle e...

AI Technical Summary

Problems solved by technology

Although the test structure of a single unit nozzle is simple, the test content that can be realized is limited. In order to achieve a variety of different test objectives, it is necessary to make major changes on the basis of the original test device or redesign the corresponding nozzle test device.

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