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针对布局变化对高层建筑下击暴流场气动干扰特性研究的缺乏,采用RNG k-ε湍流模型封闭求解N-S方程的RANS方法模拟下击暴流场,在与已有单体高层建筑下击暴流场试验数据进行对比验证的基础上,模拟研究两幢高层建筑布局的下击暴流风效应场。考虑建筑布局距风暴中心距离变化以及布局纵横向间距变化时,施扰建筑对受扰建筑立面风压的影响,获取立面风压干扰规律与特性。结果表明:受扰建筑迎风面干扰因子随风暴中心距离的增大而增大,突出表现在较大距离区间(r>2D),且干扰作用随布局纵横向间距的变化存在较明显差异;当距风暴中心较近时(r<2D),布局纵横方向间距变化对受扰建筑干扰因子的影响较小;在径向最大风速位置处(r/D=1.0),临近施扰建筑的受扰建筑侧风面风压相对单体情况有所减小,其干扰因子随布局纵向间距的增大而减小,随横向间距的增大而增大。
Aiming at the lack of research on the aerodynamic interference characteristics of the dropout flow field in high-rise buildings due to the layout change, a RANS method to solve the NS equations was adopted to simulate the strikeout flow field with RNG k-ε turbulence model. Flow field test data to verify the comparison based on the simulation study of the two high-rise buildings layout of the downstream typhoon wind effect. Considering the change of the distance between the building layout and the center of the storm and the change of the vertical and horizontal spacing of the layout, the impact of the building on the wind pressure on the facade of the disturbed building is obtained, and the rules and characteristics of the wind pressure interference on the facade are obtained. The results show that the disturbance factor on the windward side of the disturbed building increases with the distance from the center of the storm, especially in the range of larger distance (r> 2D), and the interference effect varies significantly with the longitudinal and transverse spacing of the layout. When the distance from the storm center is close (r <2D), the influence of the variation of the length and width of the layout on the disturbance factor of the disturbed building is small; at the location of the maximum radial wind speed (r / D = 1.0), the disturbance The relative wind pressure of the building side winds decreased slightly, and the interference factor decreased with the increase of the longitudinal spacing of the layout and increased with the increase of the lateral spacing.