標題: Heat Transfer Augmentation in Rotating Triangular Channels with Discrete and V-Shaped Ribs
作者: Liu, Yao-Hsien
Lai, Shi-Yu
機械工程學系
Department of Mechanical Engineering
公開日期: 1-Oct-2012
摘要: Heat transfer has been experimentally measured in a rotating triangular-shaped cooling channel with the rotation number up to 0.65. Continuous, discrete, V-shaped, and discrete-V ribs are applied on the leading and trailing surfaces to augment heat transfer. The rib spacing-to-height ratio (P/e) is 9 and rib height-to-hydraulic diameter ratio (e/D-h) is 0.085. Regionally averaged heat transfer coefficients are measured along the streamwise and spanwise directions with the Reynolds numbers from 15,000 to 25,000. Effects of secondary flow induced by ribs and rotation in this channel give distinct local heat transfer distributions. Results show that V-shaped and discrete-V ribs have comparable heat transfer distributions, and both have the highest heat transfer enhancement at stationary condition as well as rotating conditions.
URI: http://dx.doi.org/10.2514/1.T3791
http://hdl.handle.net/11536/20446
ISSN: 0887-8722
DOI: 10.2514/1.T3791
期刊: JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
Volume: 26
Issue: 4
起始頁: 603
結束頁: 611
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