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TECHNICAL PAPERS

Fluid Flow and Heat Transfer in a Rotating Two-Pass Square Duct With In-Line 90-deg Ribs

[+] Author and Article Information
Tong-Miin Liou

College of Engineering, Feng Chia University, Taichung, Taiwan, ROCe-mail: tmliou@pme.nthu.edu.tw

Meng-Yu Chen, Meng-Hsiun Tsai

Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan, ROC

J. Turbomach 124(2), 260-268 (Apr 09, 2002) (9 pages) doi:10.1115/1.1459079 History: Received January 18, 2001; Online April 09, 2002
Copyright © 2002 by ASME
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References

Figures

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Passage averaged Nusselt number ratio versus rotation number in (a) first pass, and (b) second pass for data from two research groups
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Turbulence anisotropy in terms of u′2/v′2 contours in the first pass, turn region, and the second pass
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A summary of flow patterns within the measurement range
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Evolution of streamwise mean velocity profile immediately behind the 180-deg sharp turn in a longitudinal plane adjacent to the divider wall under rotating condition and Re=1×104 for (a) the smooth two-pass duct with Ro=0.08, (b) the ribbed duct with Ro=0.05, (c) the ribbed duct with Ro=0.15 (Coriolis forces point toward leading wall)
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Mean velocity vector plots around the turn in the second pass for Ro=0.15 and Re=1.0×104 (Coriolis forces point toward leading wall)
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Regional averaged Nusselt number ratio distribution for various rotation numbers on (a) leading wall, and (b) trailing wall
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Cross-stream secondary flow patterns in the midturn (Z**=0) for Ro=0.15 and Re=1.0×104
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Detailed local Nusselt number ratio distributions for Ro=0.15 and Re=10000 on the (a) leading wall, and (b) trailing wall
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Mean velocity vector plots around the turn in the first pass for Ro=0.15 and Re=1.0×104 (Coriolis forces point toward trailing wall)
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Rotation effect on the Umax/Ub and skewness index of U profiles at the reference station in the first pass of the ribbed and smooth ducts
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Variation of streamwise mean velocity and turbulence intensity profiles with rotation number at reference station (X/H=73) of the first pass in the Z*=−0.5 plane
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Mainstream temperature variations during the transient test
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Sketch of configuration, coordinate system, and dimensions of test section
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Schematic drawing of the LDV and TLCT experimental system

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