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RESEARCH PAPER

The Effect of Initial Cross Flow on the Cooling Performance of a Narrow Impingement Channel

[+] Author and Article Information
Andrew C. Chambers, David R. H. Gillespie, Peter T. Ireland

Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, United Kingdom

Geoffrey M. Dailey

Rolls-Royce CAEL, Derby, UK

J. Heat Transfer 127(4), 358-365 (Mar 30, 2005) (8 pages) doi:10.1115/1.1800493 History: Received January 12, 2004; Revised June 07, 2004; Online March 30, 2005
Copyright © 2005 by ASME
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References

Figures

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Snapshot of a heat transfer test with no initial cross flow. Note the upstream areas where simple impingement occurs before cross flow dominates the heat transfer.
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Variation of liquid crystal transition times for the case of (1) fixed heat transfer coefficient with varying driving gas temperature and (2) fixed driving gas temperature with varying heat transfer coefficient
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Mass flux ratios as a function of hole position within the channel
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Heat transfer coefficient for target plate, Re=20,000 and no initial cross flow
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Heat transfer coefficient and effectiveness for target plate, Re=20,000 and 5 percent initial cross flow
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Heat transfer coefficient and effectiveness for target plate, Re=20,000 and 10 percent initial cross flow
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Span wise average HTC for the target plate at an average jet Reynolds number of 20,000
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Span wise average effectiveness for the target plate at an average jet Reynolds number of 20,000
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Heat transfer coefficient for the impingement plate, Re=20,000 and no initial cross flow
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Heat transfer coefficient and effectiveness for the impingement plate, Re=20,000 and 5 percent initial cross flow
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Heat transfer coefficient and effectiveness for the impingement plate, Re=20,000 and 10 percent initial cross flow
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Span wise average HTC for the impingement plate at an average jet Reynolds number of 20,000
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Span wise average effectiveness for the impingement plate at an average jet Reynolds number of 20,000
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Processing mask for Re=20,000 and 10 percent cross flow
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Schematic diagram of the cross section of a turbine blade cooled by impingement channels (Dailey, 1)
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Impingement channel geometry

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