十字形高层建筑风场数值模拟

基于计算流体动力学软件Fluent6．3，采用Realizable K—ε湍流模型对十字形高层建筑进行了三维定常风场的数值模拟，研究分析了模型各表面平均风压系数的分布规律，并探究了肢长及高宽比等参数对各立面风载体型系数的影响。结果表明：肢长的变化对十字形高层建筑各立面风载体型系数的影响较为明显；高宽比的变化仅对背风面及侧面的体型系数有较大影响，对迎风面体型系数的影响较小。

Numerical simulation of wind field on cross-shaped high-rise buildings

Using the Realizable K-ε turbulence model, the cross-shaped high-rise buildings were numerically simulated in the 3D steady wind field based on computational fluid dynamics （CFD） software Fluent 6.3. The wind pressure coefficient distributions on the surface of models were analyzed, and the influence of parameters including the limb length and ratio of height and width on the wind load shape Coefficient was also investigated. The resuhs show that the changes of the limb length obviously affect the wind load shape coefficient of building surface; and the changes of height to width ratio have a greater effect on the shape coefficient of leeward side and lateral side, but less effect on the shape coefficient of the windward side.