起伏地形对风场风速的影响  

Influence of undulated terrain on wind speed of wind field

作　　者：杨瑞[1,2] 王强[1] 王小丽[1] 张志勇[1] 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州理工大学甘肃省风力机工程技术研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2017年第3期61-67,共7页Journal of Lanzhou University of Technology

基　　金：国家国际科技合作专项(2014DFR60990);国家自然科学基金(11162009)

摘　　要：风流经山地区域时,起伏地形会显著改变风速的大小.研究起伏地形对风速的影响,对合理布置风力机具有重要意义.采用数值模拟和实验研究的方法,对一个山脊和两个山脊两种模型对来流风速的影响进行研究.结果表明:来流经过单独山脊2时,山脊底部的风速相对于来流明显减小,山脊顶部风速明显增大,最大风速出现在山脊背风面高于山顶的地方.山脊1使山脊2背风面来流方向风速减小,山脊顶部的来流方向风速增大.在山脊背风面靠近山顶的地方适合布置风力机.Undulated terrain can change the wind velocity significantly when wind passes over mountainous regions.The research on effect of undulated terrain on wind velocity is of great importance to rational layout of wind turbines.The effect of terrain on wind velocity is investigated by means of two sorts of models with one ridge and two ridges experimentally and numeric-simulatively.The result shows that when the on coming wind passes over the single ridge 2,the wind velocity at ridge bottom will reduce significantly from the oncoming wind velocity and increase significantly at ridge top.The maximum wind velocity will appear in the ridge's back at heights higher than the ridge top.The ridge 1will make the wind velocity in oncoming wind direction at the back of ridge 2decreased and increased at the top of ridge 2in the presence of ridge 1.Therefore,it will be appropriate to install wind turbines as close as to the ridge top in the ridge's back.

关 键 词：风场风速 起伏地形 实验研究 数值模拟 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]