不同建筑顶部风力机安装位置的数值模拟  

Numerical Simulation Study on Roof Mounting Position for Micro-wind Turbines under the Equilibrium Atmospheric Boundary Layer

作　　者：张衡[1] 张伟[1] 陈国平[1] 陈梦婷[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《西南科技大学学报》2017年第3期60-65,共6页Journal of Southwest University of Science and Technology

摘　　要：基于CFD方法对同一风场下不同屋顶形状的建筑模型进行数值模拟,引入平衡大气边界层和地表粗糙度等影响条件,对比分析5个风向角下6种屋顶结构对应的流场变化,根据25个参考位置的风速增长系数及湍流强度的变化情况来判断理想的风力机安装位置。结果表明:模拟平衡大气边界时,利用流场边界条件以及控制方程参数的修正能实现整个流场入流参数的水平稳定;不同屋顶形状的建筑对应的最佳安装位置在不同的风向下差异较大,在正面迎风的情况下,以流线型为主的拱形和球顶在中心位置处安装风力机能获得1.13倍的风速增长;在所有的迎风情况中,侧面45°迎风中以球顶中心处安装最佳,理论上能提高52.1%的发电效率。Based on the CFD method,the numerical simulation of the building model with different roof shapes under the same wind field is carried out. The influences of the equilibrium atmospheric boundary layer and the surface roughness are introduced,and the flow field and wind tunnel corresponding to the six roof structures are compared and analyzed. The wind speed and the turbulence intensity of the 25 refer-ence locations are used to determine the ideal wind turbine installation location. The results show that the flow field inflow parameters can be stabilized horizontally by using the boundary conditions of the flow field and the correction of the control equations when the equilibrium atmospheric boundary is simulated. The optimal installation position of different roof shapes varies greatly in different wind directions. In the front windward situation,the wind power installed at the center of the domed and the vaulted is 1. 13 times higher than the normal one;In the side 45° windward,the center of domed is best to install,theoretical-ly,it can increase the power generation efficiency by 52. 1% .

关 键 词：层顶结构 风力机 平衡大气边界层 风速增长系数 湍流强度 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]