Reynolds number effects on the fluctuating velocity distribution in wall-bounded shear layers

被引：19
|
作者：
Li, Wenfeng [1 ]
Roggenkamp, Dorothee [1 ]
Jessen, Wilhelm [1 ]
Klaas, Michael [1 ]
Schroeder, Wolfgang [1 ]
机构：
[1] Rhein Westfal TH Aachen, Inst Aerodynam, Aachen, Germany
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2017年 / 28卷 / 01期
关键词：
turbulent boundary layer; Reynolds number effect; PIV; mu-PTV; SPATIAL-RESOLUTION ISSUES; HOT-WIRE ANEMOMETRY; TURBULENT PIPE-FLOW; CHANNEL FLOW; STRESS; PRESSURE; PIV; SIMULATIONS; VELOCIMETRY; UNCERTAINTY;
D O I：
10.1088/1361-6501/aa4e9e
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The stream wise turbulence intensity and wall-shear stress fluctuations of zero pressure gradient (ZPG) turbulent boundary layers are investigated for seven Reynolds numbers based on the momentum thickness in the range of 1009 <= Re-theta <= 4070 by particle-image velocimetry (PIV) and micro-particle tracking velocimetry (mu-PTV) at a spatial resolution up to 0.06-0.23 wall units such that the viscous sublayer is well resolved. The statistics evidence good agreement with direct numerical simulations (DNS) and experimental results from the literature. The experimental results show the stream wise turbulence intensity and wall-shear stress fluctuation to grow at increasing Reynolds numbers.
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页数：11
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