作　　者： ; ; ;

机构地区： 华南农业大学工程学院

出　　处： 《可再生能源》 2012年第4期33-36,41,共5页

摘　　要： 针对上游有障碍物的山坡地形风场进行了一系列数值模拟,研究在不同来流速度下,障碍物的尺寸及其离山坡的距离对山坡地形风场的影响,考察距山坡坡顶50 m高度处的风速和湍流强度,并与无障碍物时加以比较,总结出可在坡顶形成更有利风况的障碍物条件。 In this paper,wind fields with different size of obstacles at different distances under different inflow velocity boundary conditions were simulated separately in hilly terrain.The velocity and turbulence intensity at 50 m-height above the hilltop were investigated.The results were compared with those obtained in the case without obstacle.The simulation results indicate that,obstacles do not always impede or shelter the form of wind,on the contrary,right distance and size of obstacles is good to form a favorable wind speed.If the distance between the obstacle and the front foot of hill is fixed to H,stronger wind velocity at 50m-height above the hilltop is obtained when the obstacle size h is set to be H/3 or H/2;if the obstacle size h is set to be H/5,the velocity at 50 m-height above the hilltop is greater when the distance between the obstacle and the front foot of hill ranges from 8 h to 10 h.

关 键 词： 障碍物 山坡地形 数值模拟 湍流强度

领　　域： [动力工程及工程热物理]