Study On Data Detection And Analysis System For Wind Tunnel Based On Virtual Instrument

Movable wind erosion tunnel can not only carry on erosion indoor test by simulating wind to below imitated soil, but also experiment on true earth's surface by simulating the near ground boundary flow of atmospheric boundary layer. In order to provide conveniently test system for wind tunnel experiment and know soil erosion well. In this paper, data detection and analysis system for the wind tunnel are established by using LabWindows/CVI as software developing environment. It compensates the deficiency of the original test system and improves the function of former software. The system accomplishes data acquisition, operation and saving. It draws the lines of the character of wind profile and tests aerodynamic characteristics of wind tunnel such as airflow stability, velocity equality, turbulence intensity and pressure gradient on the direction of axis. Under pure wind and wind-sand flowing condition, the relationship between wind-blown mass and wind speed accord with certain function. It can also draw the curves about them. Moreover, the datum which test attains by software compare with QDF-3-type anemometer hot ball. The result shows that this program is reliable. The system is concise and convenient to use. It provides the important data for wind tunnel. It is significant to appraise anti-wind erosion capabilities of soil.