Abstract
This article describes in details an experiment, which was done by the method Laser Doppler Anemometry (LDA). The experiment used the wind tunnel in the laboratory at the Department of Power System Engineering, Faculty of Mechanical Engineering. The result of measuring was air velocity profiles in the wind tunnel in cases with or without an obstacle in the airflow. The measurements take place in three planes perpendicular to the axis of the wind tunnel in the middle of the height of the tunnel end. Because the LDA method measures the velocity only in separated points, it is necessary to use traverse systems in the direction of measuring lines to make the velocity profiles. The results of this experiment are histograms (diagrams which show numbers of particulars values of velocity) and velocity profiles (for whole lines). These velocity profiles are compared with the results of the same experiment, which was measured by the method Particle Image Velocimetry (PIV).
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