Heat transfer in a leading edge, triangular-shaped cooling channel with three channel orientations under high rotation numbers is investigated in this study. Continuous ribs and V-shaped ribs (P/e = 9, e/Dh = 0.085), both placed at an angle (α = 45 deg) to the mainstream flow, are applied on the leading and trailing surfaces. The Reynolds number range is 15,000–25,000 and the rotation number range is 0–0.65. Effects of high rotation number on heat transfer with three angles of rotation (90 deg, 67.5 deg, and 45 deg) are tested. Results show that heat transfer is influenced by the combined effects of rib and channel orientation. When the rotation number is smaller than 0.4, rotation causes a decrease in the average Nusselt number ratios on the leading surface at a channel orientation of 90 deg. Heat transfer is enhanced gradually on the leading surface when the channel orientation varies from 90 deg to 45 deg for both ribbed cases. The highest heat transfer enhancement due to rotation is found at the highest rotation number of 0.65.
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December 2013
Research-Article
High Rotation Number Effect on Heat Transfer in a Leading Edge Cooling Channel of Gas Turbine Blades With Three Channel Orientations
Yao-Hsien Liu
Yao-Hsien Liu
e-mail: yhliu@mail.nctu.edu.tw
Department of Mechanical Engineering,
Department of Mechanical Engineering,
National Chiao-Tung University
,Hsinchu 30010, Taiwan
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Yao-Hsien Liu
e-mail: yhliu@mail.nctu.edu.tw
Department of Mechanical Engineering,
Department of Mechanical Engineering,
National Chiao-Tung University
,Hsinchu 30010, Taiwan
Manuscript received July 18, 2012; final manuscript received January 17, 2013; published online September 27, 2013. Assoc. Editor: Srinath V. Ekkad.
J. Thermal Sci. Eng. Appl. Dec 2013, 5(4): 041003 (11 pages)
Published Online: September 27, 2013
Article history
Received:
July 18, 2012
Revision Received:
January 17, 2013
Citation
Huang, S., and Liu, Y. (September 27, 2013). "High Rotation Number Effect on Heat Transfer in a Leading Edge Cooling Channel of Gas Turbine Blades With Three Channel Orientations." ASME. J. Thermal Sci. Eng. Appl. December 2013; 5(4): 041003. https://doi.org/10.1115/1.4023888
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