二次元的な境界層はく離流れに潜在する初期の三次元渦構造 : 円柱上層流境界層はく離のはく離域側からの可視化観測 (新編集方針に基づく論文)

二次元的な境界層はく離流れに潜在する初期の三次元渦構造 : 円柱上層流境界層はく離のはく離域側からの可視化観測 (新編集方針に基づく論文)
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二维边界层分离流中潜在的初始三维涡结构:从柱状上层边界层分离的分离区域侧进行目视观察(基于新编辑方针的论文)

DOI:
10.1299/kikaib.57.3273
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发表时间:
1991
期刊:
Transactions of the Japan Society of Mechanical Engineers. B
影响因子:
--
通讯作者:
喬司 亀本
喬司 亀本
中科院分区:
--
文献类型:
--
作者:
嘉文 横井;喬司 亀本

文献摘要

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虽然人们普遍认为卡门涡街是由具有三维特征的大尺度涡结构组成的,但其三维失稳的原因尚未得到阐明。在本研究中,采用激光光片技术,在230 ~ 1340雷诺数范围内观察了拖曳水箱中分离区域在圆柱体上的流动。结果表明,圆柱上层流边界层分离的三维特征以分离区域内的再循环流动为特征。研究了三维不稳定性与雷诺数的关系。
Although it is generally known that the Karman vortex street consists of large-scale vortex structures with three-dimensional characteristics, the causes of three-dimensional instability have not yet been elucidated. In this study, the flow of the separated region over a circular cylinder was observed by using the laser light sheet technique in the Reynolds number range of 230 to 1340 in a towing water tank. As a result, it was determined that the three-dimensional features of laminar boundary layer separation over a circular cylinder were characterized by the recirculating flow in the separated region. The relationship between three-dimensional instability and Reynolds number was investigated.