并排水平轴潮流能水轮机组水动力特性研究

Investigation of hydrodynamic characteristics around parallel-arranged horizontal-axis tidal stream turbines

基于FLOW-3D软件平台建立三维水动力计算模型,研究水轮机横向间距、相对安装高度和来流速度对二台并排布置的水平轴潮流能水轮机组的水动力特性的影响。结果表明:随着横向间距的增大,水轮机组受到的与来流方向相同的最大水流作用力有一定减小,最大降幅达6.62%,尾流场中水流加速区域的最大流速也略有减小,最大降幅约1.21%;水轮机组相对安装高度和来流速度的改变,对其飞逸转速、最大水流作用力以及尾流场有显著影响。

A three-dimensional （3D） hydrodynamic model was developed based on FLOW-3D. The influences of the lateral spacing and relative installation elevation of the turbines and incoming velocity on the hydrodynamics around two parallel-arranged horizontal-axis tidal stream turbines were investigated. Numerical results show that an increase of the lateral spacing between two turbines leads to a decrease of the maximum fluid force acting on the turbines in the flow direction, with a maximum decrease of 6.62% , and a decrease of the maximum velocity in the accelerating region of the wake field, with a maximum decrease of 1.21%. The changes of relative installation elevation of turbines and incoming velocity have significant impacts on the rotating speed of turbines, maximum fluid force acting on turbines, and the velocity distribution within the wake field.