Air inlet simulation system, air inlet simulation method and empty model pressure loss simulation method

Abstract

The invention is suitable for the technical field of wind tunnel tests, and provides an air inlet simulation system, an air inlet simulation method and an empty model pressure loss simulation method, and the system comprises a test model, a large-flow air exhaust mechanism, a small-flow air exhaust mechanism and an air outlet mechanism. The system is characterized in that the air inlet end of the small-flow air exhaust mechanism, the air inlet end of the large-flow air exhaust mechanism and the air outlet end of the test model are communicated with one another; the large-flow air exhaust mechanism comprises a large centrifugal fan, the large centrifugal fan is located on the side, close to the air outlet end, of the large-flow air exhaust mechanism, and the small centrifugal fan is located on the side, close to the air outlet end, of the small-flow air exhaust mechanism; and the air inlet end of the air outlet mechanism is communicated with the air outlet ends of the large-flow air exhaust mechanism and the small-flow air exhaust mechanism. The invention aims to provide an air inlet simulation system suitable for different types of engine models, can meet various air inlet simulation requirements, and has the characteristics of wide flow range, stable flow and the like.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to an air intake simulation system, an air intake simulation method and an air model pressure loss simulation method. Background technique [0002] Aircraft icing is a more noticeable source of danger in flight safety accidents. The icing on the surface of the aircraft destroys the aerodynamic shape of the aircraft, leading to a decrease in aerodynamic characteristics, and the relative amount of icing on different parts of the aircraft has different effects on the flight. Even There is a small amount of icing, but if the small amount of icing occurs in a critical position, the degree of harm is the same as that of a large area of ​​icing in other positions. Therefore, the study of icing on different parts of the aircraft has become an important issue that needs to be solved urgently. Among them, when the aircraft engine is running, a large amount of air is inha...

AI Technical Summary

Problems solved by technology

[0005] 1. In the prior art, the internal structure of the engine models of different types of aircraft is quite different, resulting in a large change in the pressure at the inlet end of the intake simulation pipeline, and a large range of pressure loss;

[0006] 2. If a large-diameter pipe is used in the air intake simulation, there will be problems of small suction volume, poor flow stability and inaccurate flow measurement under the conditions of small pressure loss and low flow air intake;

[0007] If a small-diameter pipe is used in the intake simulation, the suction capacity is seriously insufficient, and it is difficult to meet the intake conditions of large pressure loss and small flow

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