Wall surface wire display method of high-supersonic-speed inward turning air intake duct and isolated segment flow field

Abstract

The invention discloses a wall surface wire display method of a high-supersonic-speed inward turning air intake duct and an isolated segment flow field, wherein the method belongs to the technical field of hydromechanics. The method is characterized in that partial wall surfaces of the inward turning air intake duct and a flow channel in the isolated segment are replaced by a transparent material; the transparent wall surface at one side is used for observation, and the transparent wall surface at the other side is provided with a plurality of rows of micropores; wires are threaded through the micropores and are tightly adhered outside the wall surface, and furthermore background paper is adhered on the outer wall surface; in experiment, light is irradiated to the background paper; and simultaneously a wall surface wire flow spectrum of the inner flow field is photographed from the other side; and by means of the plurality of rows of micropores with known spatial positions, optical distortion correction can be performed on a wire flow spectrum picture, thereby realizing the more accurate and more reliable inner flow field structure which is observed. According to the method, through developing potential of wall surface wire displaying technology, an inner flow field display technique for the inward turning air intake duct and the isolated segment is supplied, thereby understanding the inner complicated three-dimensional flow structure of the inward turning air intake duct and the isolated segment.

Description

technical field [0001] The invention belongs to the technical field of fluid mechanics, and in particular relates to a display method for the internal flow field of a hypersonic inwardly rotating inlet and an isolation section. Background technique [0002] The hypersonic inward-rotating inlet has higher capture and compression efficiency for airflow, less aerodynamic resistance, and is easy to integrate with a circular combustion chamber. These advantages have attracted extensive attention from researchers at home and abroad. Due to the special three-dimensional structure of the inward-turning inlet and the resulting three-dimensional flow is very complicated, the flow field information obtained by the traditional schlieren method and pressure measurement method is more limited, and it is difficult to analyze the inner-turning inlet. A comprehensive understanding of the three-dimensional flow structure is obtained, and more in-depth and detailed analysis and understanding a...

AI Technical Summary

Problems solved by technology

However, these attempts are difficult to directly apply to the internal flow environment of the internal turning inlet and isolation section

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