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采用CFD软件对一栋具有不规则表面的多层建筑进行数值模拟研究,获得建筑表面风压系数分布规律。研究结果发现:当建筑表面非常规则时,表面风压系数呈规律性变化;当建筑表面不规则时,风压系数受表面形状的影响很大,变化规律主要与表面上各部位是否受到来流的直接作用密切相关,而且表面形状对迎风面的影响比背风面大。适用于低层建筑的经验公式模型用于多层建筑时,无法充分考虑建筑层数及表面形状的影响。为了准确预测建筑的通风潜力,需系统地针对建筑层数、建筑体型以及表面及特征的风压系数模型。
CFD software is used to study the numerical simulation of a multi-storey building with an irregular surface, and the distribution law of the air pressure coefficient is obtained. The results show that when the building surface is very regular, the surface wind pressure coefficient changes regularly; when the building surface is irregular, the wind pressure coefficient is greatly influenced by the surface shape, and the variation law is mainly related to whether the surface is affected by the flow Is closely related to the direct effect, and the surface shape of the windward side of the larger than the leeward. Empirical formula for low-rise buildings When used in multi-story buildings, the model can not fully consider the effect of the number of floors and the shape of the surface. In order to accurately predict the building’s ventilation potential, systematic modeling of building layers, building size, and surface and features of the wind pressure coefficient model.