Experimental investigations of a double‐decker jet impingement/film structure's cooling effectiveness |
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| Authors: | Zhenxiong Liu Junkui Mao Wen Guo Hefu Jiang |
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| Affiliation: | 1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;2. China Gas Turbine Establishment, Chengdu, Sichuan, 610500, China |
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| Abstract: | Experiments were carried out to investigate the cooling coefficient of a laminar double‐decker jet impingement/film structure. Blowing rate M, the ratio of the jet impingement distance to the diameter of the jet hole H/D, the ratio of the distance between the jet hole and film hole to the diameter of the jet hole P/D were changed to study the rules of local cooling coefficient varying with these parameters. All the results show that a higher cooling coefficient was achieved under larger blowing rate conditions. There exists a proper range of H/D and P/D, which can result in a maximum cooling coefficient. It is verified that when H/D=0.5 and P/D=4, the maximum cooling coefficient can be achieved. © 2008 Wiley Periodicals, Inc. Heat Trans Asian Res, 37(4): 232–239, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.20199 |
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| Keywords: | aerospace propulsion system double‐decker structure jet impingement film cooling cooling effectiveness |
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