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TECHNICAL PAPERS

Prediction of Flow and Heat Transfer in Rotating Two-Pass Rectangular Channels With 45-deg Rib Turbulators

[+] Author and Article Information
Mohammad Al-Qahtani, Yong-Jun Jang, Je-Chin Han

Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843

Hamn-Ching Chen

Ocean Engineering Program, Department of Civil Engineering, Texas A&M University, College Station, TX 77843

J. Turbomach 124(2), 242-250 (Apr 09, 2002) (9 pages) doi:10.1115/1.1450568 History: Received January 19, 2001; Online April 09, 2002
Copyright © 2002 by ASME
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References

Figures

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Secondary flow and temperature [θ=(T−To)/(Tw−To)] for rotating duct, Ro=0.11 and β=90 deg
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Secondary flow and temperature [θ=(T−To)/(Tw−To)] for rotating duct, Ro=0.11 and β=135 deg
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Streamwise velocity vector distribution for nonrotating duct (case 1) at three planes: 0.002Dh below the inner surface, midway between the inner and outer surfaces and 0.002Dh above the outer surface
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Temperature contours midway between the inner and outer surfaces for case 1 (Ro=0.0)
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Detailed Nusselt number ratio distribution
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Calculated and measured Nusselt number ratios; Ro=0.0,Δρ/ρ=0.115
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Calculated and measured Nusselt number ratios; Ro=0.11,β=90 degΔρ/ρ=0.115
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Calculated and measured Nusselt number ratios; Ro=0.11,β=135 degΔρ/ρ=0.115
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(a) Geometry, (b) numerical grid
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Conceptual view of the secondary flow induced by angled ribs and rotation—(a) nonrotating, Ro=0, Δρ/ρ=0.115; (b) rotating, Ro=0.11, Δρ/ρ=0.115,  β=90 deg; (c) rotating, Ro=0.11, Δρ/ρ=0.115, β=135 deg
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Velocity vectors 1/10 rib height from the leading and trailing surfaces for nonrotating case (plotted every other vector)—(a) first pass, (b) second pass
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Secondary flow and temperature [θ=(T−To)/(Tw−To)] for nonrotating duct, Ro=0.0

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