Physical Modelling of Tornado-Like Flow Field

Physical Modelling of Tornado-Like Flow Field
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类龙卷风流场的物理模拟

DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
K. Siddiqui
K. Siddiqui
中科院分区：
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文献类型：
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作者：
M. Refan;H. Hangan;K. Siddiqui

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龙卷风流场的现场测量及其在实验室环境中的物理模拟的挑战是对龙卷风及其与地面结构相互作用的科学知识的进步的主要障碍。在本文中，我们报告在加拿大西安大略大学的新的研究设施，可以物理模拟龙卷风般的漩涡。这两个设施在几何形状上相似，但规模差异超过一个数量级。定性和定量的结果表明，这两种装置都能物理模拟龙卷风状涡旋。结果还表明，径向和切向湍流速度有很强的依赖性时，从层流到湍流发生在涡核的旋流比。进一步的调查正在进行中，以研究两个设施中龙卷风状涡流物理模拟方面的缩放效应。Copyright © 2015 by ASME
The challenges in the field measurements of tornado flow field and its physical simulation in a laboratory environment are major obstructions in the advancement of scientific knowledge about tornados and their interaction with the ground structures. In this paper, we report on new research facilities at the University of Western Ontario in Canada that can physically simulate tornado-like vortex. Both facilities are geometrically similar but have more than an order of magnitude scale difference. Qualitative and quantitative results showed that both facilities can physically simulate tornado-like vortex. The results also show that the radial and tangential turbulent velocities have strong dependency on the swirl ratio when a transition from laminar to turbulent takes place in the vortex core. Further investigations are underway to study the scaling effects in terms of physical simulation of the tornado-like vortex flow in the two facilities.Copyright © 2015 by ASME