2013•The Proceedings of Mechanical Engineering Congress JapanOpen access
J056021 Turbulence in SODAR measurements
Yasunari KAMDA, Takao Maeda, Junsuke MURATA, Nobuyuki Hayasaki, Makoto Iida, Tetsuya Kogaki
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Abstract
This paper describes the effect of the turbulence in wind for the SODAR Measurements. The test is performed in the field with a high altitude mast with the height of 80m. The mast have cup anemometers and an ultra-sonic anemometer. The wind speed is compared to cup measurements. The effect of turbulence is discussed by using ultra-sonic anemometer. As the result, the SODAR can detect the wind speed in complex terrain. The slope between the cup measurements and SODAR measurements depends on the wind direction by the effect of topography. The standard deviation in wind speed by the SODAR measurements shows some difference to the cup anemometer measurements. The turbulence ratio between horizontal and vertical velocity to calculate the deviation is depends on the direction. To detect the wind speed deviation by SODAR, the detailed information of the flow should be needed.
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