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TECHNICAL PAPERS

Pressure and Flow Characteristics in a Rotating Two-Pass Square Duct With 45-Deg Angled Ribs

[+] Author and Article Information
Tong-Miin Liou

College of Engineering, Feng Chia University, Taichung, Taiwan, ROC

Guang-Yuan Dai

Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan, ROCe-mail: d853708@oz.nthu.edu.tw

J. Turbomach 126(1), 212-219 (Mar 26, 2004) (8 pages) doi:10.1115/1.1649744 History: Received December 01, 2002; Revised March 01, 2003; Online March 26, 2004
Copyright © 2004 by ASME
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References

Figures

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Sketch of configuration, coordinate system, and dimension of test section
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Schematic drawing of flow system and LDV facility
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Streamwise mean velocity and turbulence intensity profiles at inlet reference station X*=11.6 (or X/H=85) of the first pass in (a) Z*=−0.5 and (b) Y*=0 planes
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Evolution of longitudinal mean velocity component in Z*=−0.5 and Z*=0.5 planes
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Mean velocity vector plots around the turn for Re=1.0×104 and Ro=0.15 in X-Y plane of the (a) first and (b) second pass
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Mean velocity plot on the midturn cross section for Re=1.0×104 and Ro=0.15
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Distributions of transverse mean velocity on the cross-sectional planes in between rib pairs N=1 and N=2 (near the entrance) and N=7 and N=8 (near the 180-deg turn) of the first ribbed passage
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Distributions of transverse mean velocity on the cross-sectional planes in between rib pairs N=11 and N=12 (near the 180-deg turn) and N=17 and N=18 (near the exit) of the second ribbed passage
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Examination of periodic fully developed flow condition by comparing U/Ub profiles at XN/H=3.5 in various pitches
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Relationships between mean velocity components, turbulent kinetic energy, and regional averaged surface heat transfer coefficient
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Variation of dimensionless wall static pressure with X/DH at various rotation numbers (+ and ×: measured along the outer and inner side walls of the first and second passage, respectively)
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Friction factor versus rotation number

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