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http://dx.doi.org/10.3795/KSME-B.2007.31.7.628

Detailed Measurement of Heat/Mass Transfer in a Rotating Equilateral Triangular Channel with Smooth Walls  

Kim, Kyung-Min (연세대학교 대학원 기계공학과)
Lee, Dong-Hyun (연세대학교 대학원 기계공학과)
Cho, Hyung-Hee (연세대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.31, no.7, 2007 , pp. 628-634 More about this Journal
Abstract
The present study investigated the heat/mass transfer characteristics in an equilateral triangular channel simulating the leading edge cooling passage in gas turbine blade. Using naphthalene sublimation method and pressure measurement experiments, local mass (heat) transfer and pressure coefficients were obtained. The experiments were conducted with three rotating numbers between 0.0 and 0.1; two channel orientations of $0^{\circ}$ (model A) and $30^{\circ}$ (model B); the fixed Reynolds number of 10,000. The results showed that the channel rotation caused the heat transfer discrepancy between suction and pressure sides. Due to the secondary flow induced by Coriolis force, the high heat transfer appeared on the pressure side. When the channel orientation was $30^{\circ}$ (model B), the secondary flow caused the more uniform heat transfer distribution among leading edge and inner wall on pressure side than that of the model A.
Keywords
Heat/Mass Transfer; Naphthalene Sublimation Technique; Rotating Channel; Triangular Channel;
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