Unconventional configurations of tall buildings are noticeably different from their counterpart of traditional building designs but nevertheless, the unconventional configurations have often been adopted for tall buildings without their impact on the pedestrian-level wind environment (PLWE) fully understood. To fill the existing knowledge gap, this study investigates the PLWE near a 400 m super-tall building with various conventional and unconventional configurations in a regular urban area. Computational fluid dynamics (CFD) simulations were conducted for three incident wind directions (θ = 0°, 22.5°, and 45°) to investigate mean wind speed at the pedestrian level using the three-dimensional (3D), steady-state, Reynolds-averaged Navier-Stokes (RANS) technique. The results reveal 1.5- to 2.5-fold increase in maximum wind speed in the urban area after the construction of a super-tall building. The magnitude of the maximum wind speed and areas with high and low wind speeds in the PLWE, however, significantly vary with building design and incident wind direction. The configurations with sharp corners, large plan aspect ratios and frontal areas and the orientation consistently show a strong dependency on incident wind direction except the one with rounded plan shapes. The location of building openings and direction of building inclination are two other factors that modify the PLWE in an urban area. Moreover, the projected width of the super-tall building at a height slightly above the roof level of surrounding buildings is critical for estimating the areas of high and low wind speed at the pedestrian level.

中文翻译：

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常规市区内非常规配置的超高层建筑附近的行人风环境

高层建筑的非常规配置与传统建筑设计明显不同，但尽管如此，高层建筑通常采用非常规配置，而没有对行人风向环境（PLWE）产生任何影响。为了填补现有的知识空白，本研究调查了常规市区内400 m超高层建筑附近的PLWE，该建筑具有各种常规和非常规配置。针对三个入射风向（θ）进行了计算流体动力学（CFD）模拟。= 0°，22.5°和45°）以使用三维（3D）稳态雷诺平均Navier-Stokes（RANS）技术研究行人水平的平均风速。结果表明，建造超高层建筑后，市区的最大风速提高了1.5到2.5倍。但是，PLWE中最大风速的大小以及高风速和低风速的区域会随建筑设计和入射风向而显着变化。具有圆角，大的平面纵横比和正面区域以及方向的配置始终显示出对入射风向的强烈依赖性，除了具有圆形平面形状的风向。建筑物开口的位置和建筑物倾斜的方向是另外两个影响市区PLWE的因素。此外，