低层四坡屋面建筑群风环境特性的数值模拟

NUMERICAL SIMULATION OF WIND LOADS ON A LOW-RISE HIP ROOF BUILDING COMPLEX

采用数值模拟方法,结合风洞模型试验对群体低层四坡屋面房屋周围的风场及表面风压进行了计算和分析.数值模拟基于Reynolds时均方程和可实现k-ε湍流模型,采用了具有良好拓扑性能的非结构四面体网格,运用流体软件FLUENT实现流场的求解.在单体计算结果和风洞试验结果有较好吻合的前提下,获得了有相邻建筑干扰的情况下,低层四坡屋面房屋的表面风压的变化规律,结论可直接供工程设计参考.

Combined with wind tunnel test, the numerical simulation was used to analyze the wind-induced pressure on six low rise and hip roofed buildings, with Reynolds-averaged equations and realizable k-ε turbulence model. The computational domain was divided into tetrahedral elements of good topology. The flow field was numerically discretized to be solved by FLUENT, a famous CFD software. Good agreement was obtained between the computed results and wind-tunnel test results of the single house, and the variation trend of wind pressures on the surface of low-rise building under interference of the other house is discussed.