Endwall heat transfer characteristics of inclined pin-fin channels have been investigated to improve the cooling efficiency of gas turbine’s combustor liners. The time-mean local Nusselt number profiles were obtained in high spatial resolution by naphthalene sublimation technique based on the heat/mass transfer analogy and large eddy simulations. Inclined pin-fin channels with a flat or wavy endwall were tested and compared with each other. As a result, the time-averaged heat transfer coefficient of the wavy endwall was found to be higher than that of the flat endwall due to flow separation and reattachment from the hill of wavy endwall. Surprisingly, the wavy endwall case shows less or at least the same pressure loss compared to the flat endwall case. Therefore, it can be concluded that wavy endwalls can realize better heat transfer with less pressure loss as long as the aim consists in enhancing the endwall heat transfer in inclined pin-fin channels.
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2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4940-8
PROCEEDINGS PAPER
Numerical and Experimental Studies of Turbulent Heat Transfer in Inclined Pin-Fin Channels With a Wavy Endwall
Yutaka Oda,
Yutaka Oda
Osaka University, Suita, Osaka, Japan
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Kenichiro Takeishi,
Kenichiro Takeishi
Osaka University, Suita, Osaka, Japan
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Yoshiaki Miyake,
Yoshiaki Miyake
Mitsubishi Heavy Industries, Ltd., Komaki, Aichi, Japan
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Hideki Moriai,
Hideki Moriai
Mitsubishi Heavy Industries, Ltd., Komaki, Aichi, Japan
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Yusuke Motoda
Yusuke Motoda
Osaka University, Suita, Osaka, Japan
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Yutaka Oda
Osaka University, Suita, Osaka, Japan
Kenichiro Takeishi
Osaka University, Suita, Osaka, Japan
Yoshiaki Miyake
Mitsubishi Heavy Industries, Ltd., Komaki, Aichi, Japan
Hideki Moriai
Mitsubishi Heavy Industries, Ltd., Komaki, Aichi, Japan
Yusuke Motoda
Osaka University, Suita, Osaka, Japan
Paper No:
IHTC14-23191, pp. 277-284; 8 pages
Published Online:
March 1, 2011
Citation
Oda, Y, Takeishi, K, Miyake, Y, Moriai, H, & Motoda, Y. "Numerical and Experimental Studies of Turbulent Heat Transfer in Inclined Pin-Fin Channels With a Wavy Endwall." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 5. Washington, DC, USA. August 8–13, 2010. pp. 277-284. ASME. https://doi.org/10.1115/IHTC14-23191
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