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Comparisons of Flow Friction and Heat Transfer Performance in Rectangular Channels With Pin Fin-Dimple, Pin Fin and Dimple Arrays

[+] Author Affiliations
Yu Rao, Chaoyi Wan, Shusheng Zang

Shanghai Jiaotong University, Shanghai, China

Paper No. GT2010-22442, pp. 185-195; 11 pages
doi:10.1115/GT2010-22442
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 4: Heat Transfer, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4399-4 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME

abstract

An experimental study was conducted to investigate the flow friction and heat transfer performance in rectangular channels with pin fin-dimple and pin fin arrays in the Reynolds number range of 8200–54000. The friction factor, average Nusselt number and the overall thermal performance parameters of the pin fin-dimple and the pin fin channels have been obtained and compared with the experimental data of a smooth rectangular channel and previously published data of a pin fin channel and a dimpled channel. The comparisons show that the pin fin-dimple channel has a better convective heat transfer performance, a lowered friction factor and a higher overall thermal performance than the pin fin channel. The comparisons also show that the pin fin-dimple channel has a significantly higher heat transfer performance and friction factor than the dimpled channel, however the former’s overall thermal performance becomes distinctively lower than the latter at a higher Reynolds number than 37000.

Copyright © 2010 by ASME

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