The present investigation provides detailed local heat/mass transfer and pressure drop characteristics in a matrix cooling channel, under rotating conditions. The matrix channel had cooling subpassages with crossing angles of 45 deg. The detailed heat/mass transfer coefficients were measured via the naphthalene sublimation method, and pressure drops were also obtained. The experiments were conducted for various Reynolds numbers (10,500 to 44,000) and rotation numbers (0.0 to 0.8). In the stationary case, the heat transfer characteristics were dominated by turning, impinging, and swirling flow, induced by the matrix channel geometry. Average heat/mass transfer coefficients on the leading and trailing surfaces in the stationary channel were approximately 2.1 times greater than those in a smooth channel. In the rotating cases, the effect of rotation on heat/mass transfer characteristics differed from that of typical rotating channels with radially outward flow. As the rotation number increased, the Sherwood number ratios increased on the leading surfaces but changed only slightly on the trailing surfaces. The thermal performance factors increased with rotation number due to the increased Sherwood number ratios and decreased friction factor ratios.
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e-mail: hhcho@yonsei.ac.kr
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Research Papers
Local Heat/Mass Transfer and Friction Loss Measurement in a Rotating Matrix Cooling Channel
In Taek Oh,
In Taek Oh
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
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Kyung Min Kim,
Kyung Min Kim
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
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Dong Hyun Lee,
Dong Hyun Lee
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
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Jun Su Park,
Jun Su Park
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
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Hyung Hee Cho
Hyung Hee Cho
Department of Mechanical Engineering,
e-mail: hhcho@yonsei.ac.kr
Yonsei University
, Seoul 120-749, Korea
Search for other works by this author on:
In Taek Oh
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
Kyung Min Kim
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
Dong Hyun Lee
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
Jun Su Park
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
Hyung Hee Cho
Department of Mechanical Engineering,
Yonsei University
, Seoul 120-749, Korea
e-mail: hhcho@yonsei.ac.kr
J. Heat Transfer. Jan 2012, 134(1): 011901 (9 pages)
Published Online: October 27, 2011
Article history
Received:
August 30, 2010
Accepted:
August 12, 2011
Online:
October 27, 2011
Published:
October 27, 2011
Citation
Taek Oh, I., Min Kim, K., Hyun Lee, D., Su Park, J., and Hee Cho, H. (October 27, 2011). "Local Heat/Mass Transfer and Friction Loss Measurement in a Rotating Matrix Cooling Channel." ASME. J. Heat Transfer. January 2012; 134(1): 011901. https://doi.org/10.1115/1.4004853
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