ラフネス内の高さ方向平均風速分布に関する数値計算

Abstract

Near the ground the wind characteristics are directly affected by roughness elements and thewind velocity profiles vary with the location.In this paper the spatially averaged mean wind speed profiles in this region were calculatednumerically using the eddy viscosity hypothesis. The results of calculation were compared withthe experimental data and the roughness parameter which was appeared in the model was evalu-ated. The roughness parameter includes the drag coefficient of roughness element and the fric-tion velocity at the roughness height. The results shows that the roughness parameter dependson the roughness configuration. In case of cubics arrayed in a staggered pattern the relation be-tween the roughness parameter and the roughness density was obtained.