Experimental research on locations of the average wind speed point of anemometer station in rectangular roadway based on LDA

Abstract

Aiming at the characteristics of wind flow pulsation and randomness that traditional contact instantaneous wind method fails to embody, the non-contact turbulence test means of Laser Doppler Anemometer (LDA) was used to test wind speed of the wind station roadway section. Experimental results show that under the Reynolds number 2.3×104~6.5×104, even if in the steady flow of wind station, the instantaneous wind speed distribution of roadway section presents the distribution of irregular wavy lines due to random fluctuation characteristics of airflow. The wind speed distribution accords with exponential function forms, and the average wind speed location away from the edge of the wall of the vertical distance and the length ratio of about 0.17, 0.15 0.14, 0.11 and 0.08 based on statistical average of turbulence with the statistical results of regularity, and introducing the dimensionless analysis method. Research shows that the traditional principle and method for measuring wind can only meet the needs of the general engineering, but it cannot reflect underground wind turbulence pulsation characteristics. However, the experimental test results based on turbulence average test results have provided the basis to determine the location of the average wind speed point of anemometer station, and also provided basic parameters for the research and development of the underground intelligent wind instruments.