Limited available data suggest a substantial impact of Mach number on the heat transfer from an array of jets impinging on a surface at fixed Reynolds number. Many jet array heat transfer correlations currently in use are based on tests in which the jet Reynolds number was varied by varying the jet Mach number. Hence, this data may be inaccurate for high Mach numbers. Results from the present study are new and innovative because they separate the effects of jet Reynolds number and jet Mach number for the purposes of validating and improving correlations that are currently in use. The present study provides new data on the separate effects of Reynolds number and Mach number for an array of impinging jets in the form of discharge coefficients, local and spatially averaged Nusselt numbers, and local and spatially averaged recovery factors. The data are unique because data are given for impingement jet Mach numbers as high as 0.60 and impingement jet Reynolds numbers as high as 60,000, and because the effects of Reynolds number and Mach number are separated by providing data at constant Reynolds number because the Mach number is varied, and data at constant Mach number because the Reynolds number is varied. As such, the present data are given for experimental conditions not previously examined, which are outside the range of applicability of current correlations.
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April 2007
Technical Papers
Separate Effects of Mach Number and Reynolds Number on Jet Array Impingement Heat Transfer
Jongmyung Park,
Jongmyung Park
Department of Mechanical Engineering, Convective Heat Transfer Laboratory,
University of Utah
, 50 S. Central Campus Drive, MEB 2110, Salt Lake City, UT 84112-9208
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Matt Goodro,
Matt Goodro
Department of Mechanical Engineering, Convective Heat Transfer Laboratory,
University of Utah
, 50 S. Central Campus Drive, MEB 2110, Salt Lake City, UT 84112-9208
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Phil Ligrani,
Phil Ligrani
Donald Schultz Professor of Turbomachinery
Department of Engineering Sciences, Parks Road,
University of Oxford
, Oxford OX1 3PJ, UK
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Mike Fox,
Mike Fox
Aero/Thermal & Heat Transfer,
Solar Turbines, Inc.
, 2200 Pacific Highway, P.O. Box 85376, Mail Zone C-9, San Diego, CA 92186-5376
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Hee-Koo Moon
Hee-Koo Moon
Aero/Thermal & Heat Transfer,
Solar Turbines, Inc.
, 2200 Pacific Highway, P.O. Box 85376, Mail Zone C-9, San Diego, CA 92186-5376
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Jongmyung Park
Department of Mechanical Engineering, Convective Heat Transfer Laboratory,
University of Utah
, 50 S. Central Campus Drive, MEB 2110, Salt Lake City, UT 84112-9208
Matt Goodro
Department of Mechanical Engineering, Convective Heat Transfer Laboratory,
University of Utah
, 50 S. Central Campus Drive, MEB 2110, Salt Lake City, UT 84112-9208
Phil Ligrani
Donald Schultz Professor of Turbomachinery
Department of Engineering Sciences, Parks Road,
University of Oxford
, Oxford OX1 3PJ, UK
Mike Fox
Aero/Thermal & Heat Transfer,
Solar Turbines, Inc.
, 2200 Pacific Highway, P.O. Box 85376, Mail Zone C-9, San Diego, CA 92186-5376
Hee-Koo Moon
Aero/Thermal & Heat Transfer,
Solar Turbines, Inc.
, 2200 Pacific Highway, P.O. Box 85376, Mail Zone C-9, San Diego, CA 92186-5376J. Turbomach. Apr 2007, 129(2): 269-280 (12 pages)
Published Online: May 31, 2006
Article history
Received:
May 27, 2006
Revised:
May 31, 2006
Citation
Park, J., Goodro, M., Ligrani, P., Fox, M., and Moon, H. (May 31, 2006). "Separate Effects of Mach Number and Reynolds Number on Jet Array Impingement Heat Transfer." ASME. J. Turbomach. April 2007; 129(2): 269–280. https://doi.org/10.1115/1.2437774
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