Browse > Article
http://dx.doi.org/10.9726/kspse.2017.21.5.035

Effect of Rib Arrangement on Heat Transfer in the Divergent Channel  

Lee, Myung-Sung (Gyeongnam Institute for Regional Program Evaluation)
Lee, Gyeong-Ju (Department of Mechanical & System Engineering, Gyeongsang National University)
Kim, Sang-Moon (Department of Mechanical & System Engineering, Gyeongsang National University)
Min, Se-Chan (Department of Mechanical & System Engineering, Gyeongsang National University)
Bae, Jae-Moon (Department of Mechanical & System Engineering, Gyeongsang National University)
Hwang, Jun-Su (Department of Mechanical & System Engineering, Gyeongsang National University)
Park, Cheol-O (Department of Mechanical & System Engineering, Gyeongsang National University)
Kim, Dong-Chan (Department of Mechanical & System Engineering, Gyeongsang National University)
Jung, Jung-Hyeon (Department of Mechanical & System Engineering, Gyeongsang National University)
Ahn, Soo-Whan (Department of Mechanical & System Engineering, Gyeongsang National University)
Publication Information
Journal of Power System Engineering / v.21, no.5, 2017 , pp. 35-40 More about this Journal
Abstract
The effects of the different rib geometries such as V-shaped continuous (case A), parallel broken (case B), and V-shaped broken (case C) ribs on the heat transfer and pressure drops in a divergent channel with $45^{\circ}$ inclined ribs on one wall or two walls are checked out. The top and bottom walls are adiabatic; two side walls are uniformly heated in the divergent rectangular channel. The tested Reynolds numbers are ranged from 22,000 to 75,000. The channel with two opposite walls inclined only has the length of test section of 1 m and the channel divergence ratio of $D_{ho}/D_{hi}=1.49$, corresponding to $1.43^{\circ}$ inclined walls. The results show in the identical pumping power that the V-shaped continuous rib (case A) with two ribbed walls is the greatest, but the parallel broken rib (case B) with one ribbed wall is the worst in the thermal performance.
Keywords
Rib arrangement; Divergent channel; Nusselt number; Total friction factor; Thermal performance;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 S. W. Ahn, H. K. Kang, S. T. Bae and D. H. Lee, 2008, "Heat transfer and friction factor in a square channel with one, two, or four inclined ribbed walls", ASME J. of Turbomachinery, Vol. 130, No. 3, pp. 034501-5.   DOI
2 J. C. Han, L. R. Glicksman, and W. M. Rohsenow, 1978, "An investigation of heat transfer and friction for rib-roughened surfaces", Int. J. of Heat and Mass Transfer, Vol. 21, pp. 1143-1156.   DOI
3 M. E. Taslim and C. M. Wodsworth, 1977, "An experimental investigation of the rib surface - averaged heat transfer coefficient in a rib-roughened square passage", ASME J. of Turbomachinery, Vol. 119, pp. 381-389.
4 M. S. Lee, S. S. Jeong, S. W. Ahn and J. C. Han, 2014, "Effects of angled ribs on turbulent heat transfer and friction factors in a rectangular divergent channel", Int. J. of Thermal Sciences, Vol. 84, pp. 1-8.   DOI
5 M. S. Lee and S. W. Ahn, 2015, "Heat transfer in a two wall divergent rectangular channel with V-shaped ribs on one wall", J. of Korean Society for Power System Engineering, Vol. 19, pp. 32-37 (in Korean).   DOI
6 S. J. Kline and F. A. McClintock, 1953, "Describing uncertainty in a single sample experiment", Mechanical Engineering, Vol. 75, pp. 3-5.
7 F. W. Dittus and L. M. Boelter, 1930, "University of California (Berkeley) Publications in Engineering 2", Berkeley, pp. 443-461.
8 F. P. Incorpera and D. P. Dewitt, 1996, "Fundamental of heat and mass transfer", 4th ed., John Willy and Sons, Inc., p. 424.
9 M. E. Taslim and T. Li, 1994, "Experimental heat transfer and friction in channels roughened with angled, V-shaped and discrete ribs on two opposite walls", In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition, pp. V004T09A018.