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http://dx.doi.org/10.6110/KJACR.2017.29.8.401

Heat Transfer Enhancement in a Divergent Passage with 30° Inclined Ribs  

Lee, Myung Sung (Evaluation Team, Gyeongnam Institute for Regional Program Evaluation)
Ahn, Soo Whan (Dpt. of Mechanical and System Engineering, Institute of Marine Industry, Gyeongsang National University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.29, no.8, 2017 , pp. 401-407 More about this Journal
Abstract
The effect of different rib geometries such as V-shaped continuous (case A), parallel broken (case B), and V-shaped broken (case C) ribs on local heat transfer distributions and pressure drops in a divergent channel with $30^{\circ}$ inclined ribs on one wall or two walls was investigated for Reynolds numbers from 22,000 to 75,000. Top and bottom walls were insulated; two side walls were uniformly heated in the divergent channel. Heated walls were composed of 10 isolated coper sections and length-to-outlet hydraulic diameter ratio of 10. Rib height-to-outlet hydraulic diameter ratio was 0.1, and rib pitch-to-height ratio equaled 10. Results revealed that V-shaped continuous rib (case A) produced approximately 1.4 times higher average Nussselt number than in the parallel broken rib (case B), and V-shaped broken rib (case C) in the channel with two ribbed walls at Re = 54,000.
Keywords
Divergent channel; Rib geometries; Local heat transfer; Nusselt number; Total friction factor;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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