Experimental investigations of a double-decker jet impingement/film structure's cooling effectiveness
✍ Scribed by Zhenxiong Liu; Junkui Mao; Wen Guo; Hefu Jiang
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 311 KB
- Volume
- 37
- Category
- Article
- ISSN
- 1099-2871
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✦ Synopsis
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