Comparison of Tornado-induced pressures on building from CFD model with TTU experimental measurements
Comparison of Tornado-induced pressures on building from CFD model with TTU experimental measurements
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DOI：
10.1016/j.jweia.2022.105076
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发表时间：
2022-07-10
影响因子：
4.8
通讯作者：
Zuo, Delong
中科院分区：
文献类型：
--
作者：
Verma, Sumit;Selvam, R. Panneer;Zuo, Delong
已经进行了一些研究，从实验和计算方面来调查由龙卷风样风对建筑物引起的力的大小。与基于计算流体动力学（CFD）的研究相比，评估龙卷风样涡旋风荷载的实验研究数量相对较多。此外，有限数量的计算流体动力学研究往往没有通过与实验测量进行比较来验证。在这项工作中，试图验证的CFD模型，通过比较的压力引起的龙卷风样的漩涡在建筑物模型与实验测量龙卷风模拟器在德克萨斯理工大学（TTU）。对比结果表明，计算流体力学模型得到的压力系数与TTU实验数据吻合较好。此外，还研究了建筑物尺寸以及涡旋流动结构对龙卷风状涡旋引起的建筑物压力系数的影响。据观察，当考虑不同尺寸的建筑物时，建筑物上的压力可以相差高达100%，并且具有单室结构的漩涡在建筑物模型上产生最不利的加载条件。
Several studies have been carried out to investigate the magnitude of forces induced by tornado-like winds on buildings from experimental as well as computational side. The number of experimental studies evaluating the wind loads due to tornado-like vortices are comparatively greater in number than studies based on computa-tional fluid dynamics (CFD). Furthermore, the limited number of CFD studies were often not validated by comparing with experimental measurements. In this work, an attempt is made to validate a CFD model by comparing the pressures induced by tornado-like vortices on a building model with experimental measurements from the tornado simulator at Texas Tech University (TTU). Results of the comparison indicate that the pressure coefficients obtained from the CFD model agree well with TTU experimental datasets. Besides, the effect of building size as well as the effect of flow structure of vortex on pressure coefficients on the building induced by tornado-like vortex is also investigated. It is observed that the pressures on the building can differ by up to 100% when different sizes of building is considered and the vortex with a single celled structure creates the most unfavorable loading conditions on the building model.