Wake Characterization of Building Clusters Immersed in Deep Boundary Layers
Wake Characterization of Building Clusters Immersed in Deep Boundary Layers
复制标题
DOI：
10.1007/s10546-023-00830-0
复制
发表时间：
2023-10
影响因子：
4.3
通讯作者：
Abhishek Mishra;Marco Placidi;M. Carpentieri;Alan Robins
中科院分区：
文献类型：
--
作者：
Abhishek Mishra;Marco Placidi;M. Carpentieri;Alan Robins
通过风洞实验研究了建筑物阵列尺寸（N）、展弦比（AR）和建筑物间距（）对尾流平均结构和衰减的影响。数组大小为33，44和55，AR= 4，6和8，AR = 0.5，1，2和4（其中是建筑物宽度）。建筑群后面的三种不同的尾流制度被确定为：近，过渡，和远尾流制度。结果表明，这些尾流区域的空间范围由整个阵列宽度（）决定。单个建筑物的影响被观察到在近尾流区域（）中占主导地位，在近尾流区域中，单个尾流出现在每个建筑物后面。观察到这些尾流在过渡尾流区域（）中合并，形成组合尾流，其中单独的贡献不再明显。在远尾流区（），集群的尾流类似于单个孤立建筑物的顺风发展。因此，新的本地和全球尺度参数在近和远尾流制度的介绍。中心线速度赤字的衰减，然后建模为实验中考虑的三个参数的函数。
Wind tunnel experiments were conducted to understand the effect of building array size (N), aspect ratio (AR), and the spacing between buildings () on the mean structure and decay of their wakes. Arrays of size 33, 44,and 55,AR= 4, 6, and 8, and= 0.5, 1, 2and 4(whereis the building width) were considered. Three different wake regimes behind the building clusters were identified: near-, transition-, and far-wake regimes. The results suggest that the spatial extent of these wake regimes is governed by the overall array width (). The effects of individual buildings are observed to be dominant in the near-wake regime () where individual wakes appear behind each building. These wakes are observed to merge in the transition-wake region (), forming a combined wake in which the individual contributions are no longer apparent. In the far-wake regime (), clusters’ wakes are akin to those developing downwind of a single isolated building. Accordingly, new local and global scaling parameters in the near- and far-wake regimes are introduced. The decay of the centreline velocity deficit is then modelled as a function of the three parameters considered in the experiment.