Pin-fins have been used to enhance the heat transfer near the trailing edge of a turbine airfoil. Previous pin-fin heat transfer studies focused mainly on the array geometry of pin height-to-diameter equal to unity in a stationary frame. This study experimentally examines the effects of pin height-to-diameter ratio (Hp/Dp) from 2 to 4 and rotation number (Ro) from 0 to 0.2. The tested model used a staggered pin-fin array with an inter-pin spacing of 2.5 times the pin-diameter (S/D = 2.5) in both longitudinal and transverse directions. Detailed heat/mass transfer coefficients were measured using the naphthalene sublimation technique with a heat-mass transfer analogy. The data measured suggest that an increase in Hp/Dp increases the level of array heat/mass transfer. Array averaged Sherwood numbers for Hp/Dp = 3 and Hp/Dp = 4 are approximately 10% and 35% higher than that of Hp/Dp = 2. The effect of rotation induces notable difference in heat/mass transfer between the leading surface and the trailing surface. The heat transfer coefficients change a little although the rotating number increases in the tested range because the pin-fins break the rotation-induced vortices.
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ASME Turbo Expo 2008: Power for Land, Sea, and Air
June 9–13, 2008
Berlin, Germany
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4314-7
PROCEEDINGS PAPER
Heat Transfer on Rotating Channel With Various Heights of Pin-Fin
Jun Su Park,
Jun Su Park
Yonsei University, Seoul, South Korea
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Kyung Min Kim,
Kyung Min Kim
Yonsei University, Seoul, South Korea
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Dong Hyun Lee,
Dong Hyun Lee
Yonsei University, Seoul, South Korea
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Hyung Hee Cho,
Hyung Hee Cho
Yonsei University, Seoul, South Korea
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Minking K. Chyu
Minking K. Chyu
University of Pittsburgh, Pittsburgh, PA
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Jun Su Park
Yonsei University, Seoul, South Korea
Kyung Min Kim
Yonsei University, Seoul, South Korea
Dong Hyun Lee
Yonsei University, Seoul, South Korea
Hyung Hee Cho
Yonsei University, Seoul, South Korea
Minking K. Chyu
University of Pittsburgh, Pittsburgh, PA
Paper No:
GT2008-50783, pp. 727-734; 8 pages
Published Online:
August 3, 2009
Citation
Park, JS, Kim, KM, Lee, DH, Cho, HH, & Chyu, MK. "Heat Transfer on Rotating Channel With Various Heights of Pin-Fin." Proceedings of the ASME Turbo Expo 2008: Power for Land, Sea, and Air. Volume 4: Heat Transfer, Parts A and B. Berlin, Germany. June 9–13, 2008. pp. 727-734. ASME. https://doi.org/10.1115/GT2008-50783
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