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Heat Transfer in a Channel With Inclined Target Surface Cooled by Single Array of Impinging Jets

[+] Author Affiliations
Luai M. Al-Hadhrami, S. M. Shaahid, Ali A. Al-Mubarak

King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

Paper No. GT2007-27055, pp. 35-42; 8 pages
doi:10.1115/GT2007-27055
From:
  • ASME Turbo Expo 2007: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2007, Parts A and B
  • Montreal, Canada, May 14–17, 2007
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4793-4 | eISBN: 0-7918-3796-3
  • Copyright © 2007 by ASME

abstract

An experimental investigation has been carried out to study the heat transfer characteristics in a channel with heated target plate inclined at an angle cooled by single array of centered impinging jets. The target plate forms the leading edge of a gas turbine blade. The work includes the effect of various exit outflow orientations and crossflow and feed channel aspect ratios on the heat transfer characteristics for a given orifice-jet plate configuration. Three feed channel aspect ratios (H/d = 5, 7, 9) and have been examined. In general, it has been observed that Nu is high for higher aspect ratios. This increase can be attributed to increase in strength of impinging jets due to increase in feed channel aspect ratio. Additionally, for a given jet-orifice plate with centered holes and for a given Re = 18800, the heat transfer is almost the same through out the target surface for the outflow passing out in both the directions.

Copyright © 2007 by ASME

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