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湍流模型是建筑表面风压数值计算精度的重要影响因素之一。本文针对低层单体建筑和并列式建筑群,在0°~90°多个风向角下,基于雷诺平均法的RNG k-ε、Realizable k-ε和SST k-ω3种湍流模型,对建筑表面风压开展数值计算,并与日本东京工艺大学的风洞实验结果对比,检验不同模型的计算精度。结果表明,Realizable k-ε模型和SST k-ω模型对建筑迎背风面的平均风压及风压差系数和测点风压系数计算精度较高,可用于单体建筑及建筑群的表面风压数值计算。
Turbulence model is one of the most important factors affecting the numerical accuracy of building surface wind pressure. In this paper, three kinds of turbulence models, RNG k-ε, Realizable k-ε and SST k-ω based on Reynolds averaging method, are constructed for low-rise single buildings and parallel buildings. Wind pressure numerical calculation, and with the Tokyo University of Technology wind tunnel test results, test the accuracy of different models. The results show that the Realizable k-ε model and SST k-ω model can calculate the mean wind pressure, wind pressure difference coefficient and wind pressure coefficient at the windward side of the building, which can be used in the surface wind of single buildings and buildings Pressure numerical calculation.