【摘要】 利用CFD方法,考虑不同入流角、风剖面和地表粗糙度的影响,对篱笆下游的流场特征进行模拟计算。分析:3种入流角时,篱笆下游湍动能分布情况;2种入流角时,42个参考位置处的风加速因子和湍流强度随高度的变化规律,得到风力机安装的合适位置和高度,最后通过实验验证了模拟结果的正确性。结果表明:避开湍流区,篱笆下游风力机的安装高度至少要高于篱笆0.5 H(H为篱笆高度);篱笆下游水平方向上(1~2.6)H的区间内和垂直方向上高于篱笆(0.5~2)H区间内均可安装风力机且输出功率会增加。更多还原

【Abstract】 By using the CFD method,the flow characteristics in the downstream of the fence are calculated by considering the influence of different inflow angles,wind profiles and surface roughness.The distribution of the turbulent kinetic energy at the downstream of the fence is analyzed under 3inflow angles;the variation law of wind acceleration factor and turbulence intensity with the height of42 reference positions at the 2 inflow angles,the proper position and height of the wind turbine are obtained. Finally,the correctness of the simulation results is verified by experiments. Results show:To avoid turbulence,the installation of the downstream wind turbine fence height of at least higher than the fence 0.5 H(H for the fence height); in the horizontal direction(1~2.6) H of the downstream of the fence,the wind turbine can be installed in the H and the vertical direction higher than the fence(0.5~2), and the output power can be increased.更多还原