不同建筑环境下平均风速剖面的数值模拟

Numerical Simulation of Mean Wind Speed Profile Under Different Building Conditions

摘要:

基于计算流体力学（CFD）方法对具有不同建筑环境参数的城市上空的风场进行系统性的数值模拟，并对平均风速剖面指数的变化规律进行讨论。研究结果表明，建筑平均高度对平均风速剖面指数的影响较大，建筑密度对平均风速剖面指数的影响较小。文中还给出了以建筑平均高度和建筑密度为自变量的平均风速剖面指数经验公式。

Abstract:

Based on the computational fluid dynamics method （CFD）， the wind field cases with different building environment parameters were systematically simulated and the variation of mean wind speed profile exponents was discussed. The results show that the average building height has a greater impact on the mean wind speed profile exponent than the building density. An empirical formula for the mean wind speed profile exponent with the average building height and building density is proposed as independent variables.