沙丘迎风坡曲率对风速加速因子的影响

Effect of Windward Slope Curvature of Sand Dunes on Wind Speed-up Factor

采用FLUENT软件对沙丘迎风坡风速加速过程进行计算,研究沙丘高度、来流风速、迎风坡角度和曲率对迎风坡加速因子的影响,结果显示,来流风速和沙丘高度对加速因子的影响不明显,迎风坡曲率和迎风坡角度对加速因子有明显的影响,并给出加速因子随曲率和迎风坡角度变化的拟合公式。

In this paper, the wind speed-up process on dune windward slope was calculated by using of the FLUENT software, and the influences of dune height, wind velocity, windward slope and curvature were discussed. The results indicated that windward slope angle and curvature significantly influenced the speed- up factor, and there are ideal fitting function of wind speed-up factor changing with windward slope angle and curvature, however, dune height and wind velocity had little effect. Finally, the formula about speed-up factor and windward slope as well as curvature was fitted.