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TECHNICAL PAPERS

Heat Transfer in Rotating Rectangular Cooling Channels (AR=4) With Dimples

[+] Author and Article Information
Todd S. Griffith, Luai Al-Hadhrami, Je-Chin Han

Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123

J. Turbomach 125(3), 555-563 (Aug 27, 2003) (9 pages) doi:10.1115/1.1571850 History: Received January 18, 2002; Online August 27, 2003
Copyright © 2003 by ASME
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References

Figures

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Sketch illustrating orientation of a 4:1 aspect ratio channel in a gas turbine blade
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Schematic of experimental rotating test rig
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Schematic of 4:1 dimpled test
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Dimple induced secondary flow (conceptualization)
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Rotation-induced (Coriolis force) vortices in rectangular channel
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Nusselt number ratio for stationary smooth case
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Nusselt number ratio for rotation smooth case with β=90 deg
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Nusselt number ratio for rotation smooth case with β=135 deg
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Nusselt number ratio for stationary dimpled case
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Nusselt number ratio for rotation dimpled case with β=90 deg
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Nusselt number ratio for rotation dimpled case with β=135 deg
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Streamwise averaged Nusselt number ratio for dimpled and smooth channels with β=90 deg
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Streamwise averaged Nusselt number ratio for dimpled and smooth channels with β=135 deg
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Streamwise averaged Nusselt number ratio for dimpled and ribbed channels with β=90 deg
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Streamwise averaged Nusselt number ratio for dimpled and ribbed channels with β=135 deg

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