Supersonic engine test bed and testing method thereof

Abstract

The invention discloses a supersonic engine test bed. The supersonic engine test bed comprises an air inlet system, an engine thrust measuring rack, an exhaust system, a silencing device and a high-altitude simulation cabin, wherein the high-altitude simulation cabin is of a sealed housing structure; the engine thrust measuring rack is fixedly mounted in the high-altitude simulation cabin; a tested engine is mounted on the engine thrust measuring rack; and one end of the exhaust system penetrates through the surface of a housing of the high-altitude simulation cabin and is fixedly mounted inside the high-altitude simulation cabin, and the other end of the exhaust system fixedly communicates with the silencing device. According to the supersonic engine test bed, the supersonic air inlet state of a supersonic engine is simulated when the supersonic engine and the engine are subjected to ground tests; meanwhile, the engine thrust measuring rack is used for measuring the thrust of the engine, and the structure is simple; and in addition, the silencing device is used for reducing the use number of silencing sheets on the premise that the silencing capacity is guaranteed, the occupied area is small, the application range is wide, and meanwhile, the cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of engine testing, in particular to a supersonic engine test bench and a testing method thereof. Background technique [0002] Engine testing and testing technology is an important part of solid propulsion technology. Before the flight test of an aeroengine, a high-altitude simulation test needs to be done on the ground. During the engine test, a set of intake parameters are required, including the total intake pressure and the intake air flow rate. , intake air oxygen content, total intake air temperature, and engine fuel supply are called intake state points. After reaching the set value and stabilizing at the same time, record its performance and parameters or evaluate its performance. With the maturity of the engine, the application of the supersonic engine is becoming more and more extensive. On this basis, the engine intake system needs to simulate the supersonic speed of the supersonic engine when it ...

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Problems solved by technology

[0005] For the noise reduction method for the noise generated by the test bench, there is no very mature and effective technical means in the prior art. The applicant first applied for CN203910262U, and proposed a muffler, which has a certain effect on the noise reduction and noise reduction of the test bench. , but the staggered arrangement of thick and thin slice components of the muffler requires a large footprint. Sheet components and sheet components (each layer of sound absorbing sheet components requires at least 2 thick sheet components of the muffler and 2 thin sheet components of the muffler plus half a thick sheet assembly of the muffler and a half sheet assembly of the muffler), resulting in a significant increase in cost; another On the one hand, when the floor area of ​​the engine test bench that allows the installation of noise reduction equipment is small and does not allow the staggered arrangement of thick sheet components and thin sheet components of the muffler described in this patent application on each floor, removing any piece of noise reduction sheet will result in a reduction in the noise reduction capability. Decline

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