Direct-connection test equipment for simulating actual inlet conditions of scramjet engine isolation section and combustion chamber

Abstract

The invention provides direct-connection test equipment for simulating the actual inlet conditions of a scramjet engine isolation section and combustion chamber. The direct-connection test equipment comprises an equipment jet pipe which is used for accelerating airflow to the target Mach number, a boundary layer development section which is used for generating a boundary layer, an expansion section which is used for generating accurate oblique shock wave and an engine isolation section model. The equipment jet pipe is firstly arranged, the outlet of the equipment jet pipe is connected with the inlet of the boundary layer development section, the outlet of the boundary layer development section is connected with the inlet of the expansion section, and the outlet of the expansion section is connected with the isolation section model. The airflow is accelerated to the target Mach number through the equipment jet pipe, a non-uniform boundary layer with inconsistent thickness of the upper and lower wall boundary layers is formed through the boundary layer development section, and then the airflow enters the expansion section to generate the accurate oblique shock wave so that the airflow parameters consistent with the actual inlet conditions of the scramjet engine isolation section and combustion chamber can be formed. Meanwhile, a shock wave generator has an expansion configuration so that the starting problem of the conventional direct-connection test equipment can be solved.

Description

technical field [0001] The invention relates to the field of aerodynamics, in particular to a direct connection test device for simulating the actual inlet conditions of a scramjet isolation section and a combustion chamber. Background technique [0002] Compared with free jet test and flight test, direct connection test equipment has the advantages of simple structure, low test cost, long test duration and short test period, so it has been widely used. [0003] The isolation section / combustion chamber is an important part of the scramjet engine, and its performance will directly affect the overall performance of the engine and the stability of each component. Therefore, the experimental research on the isolation section / combustion chamber of the scramjet engine is very important. meaning. The traditional direct-connected test equipment can only simulate the uniform supersonic incoming flow. However, due to the high degree of integration between the body of the hypervehicle...

AI Technical Summary

Problems solved by technology

[0004] The existing shock wave generator is connected behind the nozzle of the equipment, and the oblique shock wave is generated by the wall surface rotating inward at a certain angle, which leads to a contraction configuration, and there is a risk that the direct connection test bench will not start

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