建筑高度对周围风场环境影响的数值模拟

建筑风环境作为建筑节能设计的一个重要方面,其对于区域气候与局部微气候的影响都不容忽视。本文应用基于RNG k-ε模型的CFD软件数值模拟研究不同的建筑高度差对建筑周围风场环境的影响,揭示有利于风流动的建筑因素,为进一步的住区建筑规划提供思路。模拟结果显示,在来流风速一定双体建筑高度差不同时,建筑间谷区风速与形成涡旋的中心位置和大小均不同。

NUMERICAL SIMULATION ON EFFECT OF THE WIND FILED AROUND BUILDS UNDER BUILDING ALTITUDE

The wind environment in urban is an important factor of Energy saving design for architecture,which have a significant impact on regional climate and area microclimate.This paper is mainly about a simulation research which based on the software of CFD with the application of the RNG k-ε model.The numerical simulation studies the influence of different building altitude intercept on the wind environment around the building,and reveals the architectural factors which are favorable to the airflow,so as to provide ideas for further residential building planning.The simulation results prove that different altitude intercept of Catamaran construction with the same wind speed can generate different wind speed in the valley area of buildings and vortex with different position of the center and size.