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CFD analysis of the impact of geometrical characteristics of building balconies on near-facade wind flow and surface pressure

机译：CFD分析建筑阳台几何特征对近立面风流和表面压力的影响

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摘要

The presence of building balconies can significantly modify the near-facade wind flow pattern and surface pressures. The present study evaluates the impact of building balcony geometry on mean wind speed on balcony spaces and wind-induced mean surface pressure for generic high-rise buildings. The focus is on balconies that extend along the entire width of the building facade. Large-eddy simulations (LES), validated with wind tunnel experiments, are conducted to investigate the impact of (i) balconies present or not, (ii) balcony depth, (iii) balcony parapet walls, (iv) balcony partition walls, and (v) density of balconies. The results indicate that the balcony geometry can greatly affect the mean wind speed on balcony spaces and the local and facade-averaged mean pressure coefficient (Cp). The presence of balconies can increase the facade-averaged Cp over the windward and leeward facades by 5.2% and 8.9%, respectively. These numbers rise to 23.5% and 23.3% when two partition walls are added at the lateral edges of the facades. Adding five partition walls can reduce the overall areaaveraged wind speed on balcony spaces by 68.0% compared to the case without partition walls. These findings can be useful in developing, designing and constructing buildings with facade geometrical details that improve building ventilation, air quality and wind comfort.
机译：建筑阳台的存在可以显着改变近乎外立面的风力流动模式和表面压力。本研究评估了建筑阳台几何对阳台空间的平均风速的影响以及通用高层建筑的风力诱导平均表面压力。重点是沿着建筑立面的整个宽度延伸的阳台上。通过风洞实验验证的大涡模拟（LES），探讨了（i）阳台的影响，（ii）阳台深度，（iii）阳台栏杆墙，（iv）阳台隔断墙和（v）阳台密度。结果表明，阳台几何形状可以极大地影响阳台空间上的平均风速和局部和外立平均平均压力系数（CP）。阳台的存在可以分别将外立平均值增加5.2％和8.9％。当在外墙的横向边缘添加两个分隔壁时，这些数字上升到23.5％和23.3％。与没有隔墙的情况相比，添加五个隔墙可以减少阳台空间的整体距离阳台空间的风速68.0％。这些调查结果可用于开发，设计和建造建筑物，具有改善建筑通风，空气质量和风舒适度的外立面几何细节。

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