Effects of Mach number and Reynolds number on jet array impingement heat transfer |
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| Affiliation: | 1. Department of Mechanical Engineering, 50 S. Central Campus Drive, MEB 2110, University of Utah, Salt Lake City, UT 84112 9208, United States;2. Convective Heat Transfer Laboratory, 50 S. Central Campus Drive, MEB 2110, University of Utah, Salt Lake City, UT 84112 9208, United States;3. Aero/Thermal and Heat Transfer, Solar Turbines Inc., 2200 Pacific Highway, P.O. Box 85376, Mail Zone C-9, San Diego, CA 92186 5376, United States;4. Turbomachinery Laboratory, Department of Engineering Science, Parks Road, Oxford University, Oxford OX1 3PJ, United Kingdom;1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China;3. Jiangsu Province Key Laboratory of Aerospace Power System, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;4. Collaborative Innovation Center of Advanced Aero-Engine, Beijing 100191, China;1. Dipartimento di Ingegneria Industriale – Sezione Aerospaziale, Università di Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy;2. Aerospace Engineering Group, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911 Leganés, Madrid, Spain;1. Parks College of Engineering, Aviation, and Technology, Saint Louis University, 3450 Lindell Boulevard, St. Louis, MO 63103, USA;2. Oliver L. Parks Endowed Chair, Parks College of Engineering, Aviation, and Technology, Saint Louis University, 3450 Lindell Boulevard, St. Louis, MO 63103, USA;3. Department of Mechanical and Automotive Engineering, High Safety Vehicle Core Technology Research Center, Inje University, 197 Inje-ro, Gimhae, Gyeongnam 621-749, Republic of Korea;4. Aero/Thermal & Heat Transfer, Solar Turbines, Inc. 2200 Pacific Highway, P.O. Box 85376, Mail Zone C-9, San Diego, CA 92186-5376, USA |
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| Abstract: | Experimental results from the present study show substantial, independent Mach number effects (as the Reynolds number is held constant) for an array of impinging jets. The present discharge coefficients, local and spatially averaged Nusselt numbers, and local and spatially averaged recovery factors are unique because (i) these data are obtained at constant Reynolds number as the Mach number is varied, and at constant Mach number as the Reynolds number is varied, and (ii) data are given for jet impingement Mach numbers up to 0.74, and for Reynolds numbers up to 60,000. As such, results are given for experimental conditions not previously examined, which are outside the range of applicability of existing correlations. |
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