Pneumatic model tester for aircraft engine

Abstract

The invention relates to an aviation test device, and particularly relates to a pneumatic model tester for an aircraft engine. An inner culvert shell (4) is arranged inside an outer culvert shell (2), the inner culvert shell (4) and the outer culvert shell (2) are respectively communicated with an air inlet device, the air inlet device is a pipeline with a U-shaped section, and an expansion joint is respectively arranged on the pipeline communicated with two ends of the U-shaped section and the linear section of the U-shaped section pipeline. The tester is compact in structure size, can quickly realize studies of engine exhaust parameters and characteristics thereof in a test cabin, can simulate the test condition in the test cabin under the real test condition, can directly acquire high-precision thrust measurement influencing data in the test cabin, and provides test correction and technical support for real engine test. Flowing of inner and outer culverts is separately simulated, so that main engines such as turbojet engines, inner and outer culvert separated exhausting turbofan engines, inner and outer culvert hybrid exhausting turbofan engines and the like can be flexibly simulated.

Description

technical field [0001] The invention relates to an aviation test device, in particular to an aeroengine aerodynamic model tester. Background technique [0002] In the high-altitude simulation test of an aero-engine, various factors such as geometry, aerodynamics, thermal and unsteady factors in the closed space of the test cabin interact to produce coupling effects on the engine thrust. In order to determine the thrust characteristics of the engine, a detailed aerodynamic study of the test chamber with the engine is required, which requires the aerodynamic model test of the engine in the high-altitude simulation test. In the wind tunnel test of the aircraft, the engine has an influence on the overall aerodynamic characteristics of the aircraft, and the simulation of the exhaust characteristics of the engine is one of the important research issues in the wind tunnel test. At present, for the exhaust thrust characteristics, domestic researches on the characteristics of engine...

AI Technical Summary

Problems solved by technology

At present, with regard to the exhaust thrust characteristics, the research on the characteristics of the engine and the test chamber is mainly carried out in China through theoretical analysis, numerical calculation, and empirical coefficient correction, etc., and it is difficult to give accurate calculation results.

The research in the wind tunnel is also limited to the preliminary development of the ejector engine simulator, which cannot realize the precise control of the pressure and temperature of multiple streams; and there is no special equipment for the research on the relationship between the exhaust characteristics of the aeroengine and the test chamber in China.

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