Transitional Characteristics of Flow in a Vortex-Generating Region Behind a Body by Means of LDV.

Transitional Characteristics of Flow in a Vortex-Generating Region Behind a Body by Means of LDV.
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利用 LDV 方法研究物体后面涡生成区域流动的过渡特性。

DOI：
10.1299/kikaib.59.3303
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发表时间：
1993
期刊：
Transactions of the Japan Society of Mechanical Engineers. B
影响因子：
--
通讯作者：
Yoshitaka Dogan
Yoshitaka Dogan
中科院分区：
--
文献类型：
--
作者：
H. Haniu;H. Sakamoto;Yoshitaka Dogan

文献摘要

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对三角棱镜产生的涡流进行了实验研究。采用激光多普勒测速技术（LDV）和集合平均技术在水工水槽中进行了旋涡发生区域的非定常速度场测量。本研究阐明了钝体产生的涡的过渡特征。特别地，澄清了涡度在涡度集中区域的消散现象。最后，澄清了从分离剪切层携带涡量的流体颗粒的行为。
An experimental study was carried out on vortices issued from a triangular prism. The experiments were conducted in a hydraulic flume using laser Doppler velocimetry (LDV) and the ensemble-averaging technique to map the unsteady velocity field about the vortex-generating region. From this study, transitional characteristics of vortices issued from a bluff body were clarified. In particular, the dissipating phenomenon of vorticity in the vorticity-concentrating region was clarified. Lastly, behavior of entrained fluid particles carrying vorticity from the separated shear layer was clarified.