Asymmetric arc boundary layer pressure measuring bent frame

Abstract

The invention discloses an asymmetric arc-shaped boundary layer pressure measuring bent frame, belongs to the field of experimental aerodynamics, and aims to solve the current situation that the number of measuring points of an existing linear comb-shaped bent frame is small, and a measuring result is influenced by probe interference. The bent frame comprises a mounting base, an arc section support, a straight section support and a pressure measuring probe. The section, in the windward direction, of the arc section support is in an arc shape, the section, in the vertical direction, of the arcsection support is a quarter arc, and the front end, in the windward direction, of the arc section support is in a wedge shape. The section of the straight section support in the windward direction isin a straight line shape, and the front end of the straight section support in the windward direction is in a wedge shape. A fixing hole is formed in the mounting base, and the two ends of the arc section support are connected with the mounting base and the bottom end of the straight section support respectively. On the basis of accuracy and reliability, the pitot pressure distribution of the boundary layer in a near-wall-surface thin-layer area can be accurately obtained, the interference influence between probes can be effectively reduced, and the accuracy of a measurement result is improved.

Description

technical field [0001] The application relates to the field of experimental aerodynamics, in particular to the field of experimental dynamics measurement equipment, specifically an asymmetric arc-shaped boundary layer pressure measuring bent frame. The pressure measuring bent frame of the present application is an asymmetric arc-shaped boundary layer pressure measuring bent frame that can be used for measuring the flow characteristics of thin boundary layers, which can effectively reduce the influence of interference between probes and improve the accuracy of measurement results. Background technique [0002] The thickness of the boundary layer is one of the key contents of the flow field calibration in the wind tunnel test section. It not only affects the uniformity of the flow field in the model area, but also has a significant impact on the correction of disturbances such as airflow blockage and flow field distortion. Accurate measurement of pressure distribution is a nec...

AI Technical Summary

Problems solved by technology

This traditional measurement method can more accurately measure the velocity distribution in the upper part of the boundary layer where the velocity change eases; The small number of pressure measurement points on the frame is not conducive to the data fitting of the rapidly changing flow field. On the other hand, the distance between the measurement points is small, and the measurement results are affected by the mutual interference of the probes, which reduces the accuracy of the measurement.

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