A Method for Measuring and Judging the Normal Shock Wave Position of Temporary Supersonic Wind Tunnel

Abstract

The invention discloses a method for measuring and determining a normal shock wave position of an intermittent supersonic wind tunnel. Through measurement and analytical judgment on a static pressure of a line between the experiment section inlet of the supersonic wind tunnel and the diffusion section outlet of the supersonic wind tunnel, a position where the static pressure suddenly increases and a mold surface expansion monotonically increases, thereby accurately determining the normal shock wave position and performing real-time display, making the normal shock wave position which cannot be determined in a previous supersonic wind tunnel experiment obvious in real time, and providing an effective data insurance for fine control and intelligent safety protection of the supersonic wind tunnel. The method has functions of realizing real-time measurement, determination and display for the accurate position of the normal shock wave of the supersonic wind tunnel, displaying the change condition of the normal shock wave position along with the gesture of an experiment model in the experiment in real time, and providing data support for accurately pre-estimating the change trend of the normal shock wave position, evaluating danger grade of the wind tunnel experiment and ensuring safe operation of the wind tunnel.

Description

technical field [0001] The invention relates to the field of aerospace wind tunnel tests, in particular to a method for measuring and judging the position of a normal shock wave in a temporary supersonic wind tunnel. Background technique [0002] When the temporary supersonic wind tunnel is running, there must be a normal shock wave passing through the model area of ​​the wind tunnel test section and stabilizing in the downstream of the test section. When the normal shock wave sweeps over the test model in the wind tunnel test section, the test model will vibrate violently, which may endanger the safety of the wind tunnel test. Therefore, when the supersonic wind tunnel is running, it is necessary to control the normal shock wave to pass through the wind tunnel test model area quickly, so that the time for the normal shock wave to sweep the test model is as short as possible; Waves do not return to the wind tunnel test model area. [0003] The speed of the normal shock wav...

AI Technical Summary

Problems solved by technology

However, at present, the position of the normal shock wave in supersonic wind tunnels can only be monitored by the shock wave sensor, and the shock wave sensor can only monitor whether the normal shock wave passes through, and cannot give the exact position of the normal shock wave in real time

That is, it cannot provide data support for more economical and safe operation of supersonic wind tunnels

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