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Effect of Number of Heating Walls on Heat Transfer in Ribbed Rectangular Channel  

Bae Sung Taek (Marine Engineering Dept., Graduate School, Gyeongsang National University)
Ahn Soo Whan (School of Mechanical & Aerospace Engineering, Gyeongsang National University, Institute of Marine Industry)
Kim Myoung Ho (Marine Engineering Dept., Graduate School, Gyeongsang National University)
Lee Dae Hee (School of Mech & Automotive Engineering, Inje University)
Kang Ho Keun (School of Mechanical & Aerospace Engineering, Gyeongsang National University, Institute of Marine Industry)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.6, 2005 , pp. 514-520 More about this Journal
Abstract
Surface heat transfer of a fully developed turbulent air flow in a $45^{\circ}$ inclined ribbed square duct with two and four heating walls was experimentally investigated, at which the experimental works were peformed for Reynolds numbers ranging from 7,600 to 26,000. The pitch-to-rib height ratio, p/e, was kept at 8 and rib-height-to-channel hydraulic diameter ratio, $e/D_h$ was kept at 0.0667. The channel length-to-hydraulic diameter ratio, $L/D_h$ was 60. The heat transfer coefficient values were decreased with the increase in the number of heat-ing walls. Results of this investigation could be used in various applications of internal channel turbulent flow involving roughened walls.
Keywords
Fully developed turbulent flow; Rough square duct; Number of heating walls; Heat transfer coefficient;
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