Airspace-engine test-bed long-range exhaust system

Abstract

The invention belongs to the aviation and airspace engine test technology field and especially relates to an airspace-engine test-bed long-range exhaust system. The system comprises a water vapor generator, an alcohol supply system, a liquid oxygen supply system, a softened water supply system, a plasma igniter, a gas distribution system and a steam ejector system. The water vapor generator comprises a straight tube and four medium pipelines installed on the straight tube. The four medium pipelines comprise an alcohol pipeline, a liquid oxygen pipeline and two softened water pipelines. A top center of the straight tube is provided with the plasma igniter. The alcohol pipeline of the four medium pipelines is connected to the alcohol supply system. The liquid oxygen pipeline is connected to the liquid oxygen supply system. The two softened water pipelines are connected to the softened water supply system. A lower end of the straight tube is connected to the steam ejector system. The gas distribution system is used for providing a nitrogen gas source for the alcohol supply system, the liquid oxygen supply system, the plasma igniter and the steam ejector system. By using the system, a test requirement can be satisfied and the test is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of aviation and aerospace engine tests, and in particular relates to a long-distance exhaust system of an aerospace engine test bench. Background technique [0002] At present, in the aerospace engine test conducted in China, in order to ensure that the test chamber always has a certain degree of vacuum during the engine test process, the methods used to exhaust the test chamber are mainly as follows: [0003] a. Purchase a large spherical tank, build an air compressor plant, use the air compressor unit to pump the spherical tank to a certain vacuum degree, and use the vacuum inside the spherical tank to discharge the air and gas in the test chamber into the spherical tank during the test, so as to Obtain the vacuum degree in the test chamber. [0004] b. Build an air bottle field, equipped with a large number of high-pressure air bottles, and use air as the medium to eject through the ejector. [0005] c....

AI Technical Summary

Problems solved by technology

[0007] 1. The engine test time is short. At present, the direct-connected engine test with a small flow rate can only last up to 1200s, and the free jet test is basically about 20s. It is difficult to meet the long-distance test requirements of the engine with a large flow rate.

2. The scale of investment is large, and the facilities and workshops occupy a large area; 3. High risk; 4. Low efficiency

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