Browse > Article
http://dx.doi.org/10.3795/KSME-B.2005.29.3.340

Effect of Number of Rough Walls on Pressure Drop and Heat Transfer in Square Channel  

Bae Sung Taek (경상대학교 대학원 기계시스템공학과)
Kim Myoung Ho (경상대학교 대학원 기계시스템공학과)
Jin Yong Soo (경상대학교 실습선)
Kim Sung Tae (경상대학교 농업시스템 공학부)
Ahn Soo Wan (경상대학교 기계항공공학부, 해양산업연구소)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.29, no.3, 2005 , pp. 340-348 More about this Journal
Abstract
Repeated ribs are used on heat exchange surfaces to promote turbulence and enhance convective heat transfer. Applications include fuel rods of gas-cooled nuclear reactors, inside cavities of turbine blades, and internal surfaces pipes used in heat exchangers. Despite the great number of literature papers, only few experimental data concern detailed distributions of friction factors and heat transfer coefficients in square channels varying the number of rough walls. This issue is tackled by investigating effects of different number of ribbed walls on heat transfer and friction characteristics in square channel. The rough wall have a $45{\circ}C$ inclined square rib. Uniform heat flux is maintained on whole inner heat transfer channel area. The heat transfer coefficient and friction factor values increase with increasing the number of rough walls.
Keywords
Number of Rough Walls; Square Duct; Friction Factor; Heat Transfer Coefficient;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Han, J. C., 1984, 'Heat Transfer and Friction in Channels with Two Opposite Rib-Roughened Walls,' J. Heat Transfer, Vol. 106, pp. 774~781   DOI
2 Chandra, P. R., Alexander, C. R. and Han, C. J., 2003, 'Heat Transfer and Friction Behaviors in Rectangular Channels with Varying Number of Ribbed Walls,' Int. J. Heat Mass Transfer, Vol. 46, pp. 481∼495   DOI   ScienceOn
3 Webb, R. L. and Eckert, E. R. G., 1972, 'Application of Rough Surfaces to Heat Exchanger Design,' Int. J. Heat Mass Transfer, Vol. 15, pp. 1647~1658   DOI   ScienceOn
4 Sieder, E. N. and Tate, C. E., 1936, 'Heat Transfer and Pressure Drop of Liquids in Tubes,' Ind. Eng. Chem., Vol. 28, pp. 1429∼1936   DOI
5 Choi, C., Rhee, D. H. and Cho, H. H., 2002, 'Heat/Mass Transfer and Pressure Drop in a Square Duct with V-shaped Ribs,' Trans. of the KSME(B), Vol. 26, No. 11, pp. 1542~1551   과학기술학회마을   DOI   ScienceOn
6 Kays, W. M. and Crawford, M. E., 1989, Convective Heat and Mass Transfer, 2nd ed., McGraw-Hill New York
7 Kline, S. J. and McClintock, F. A., 1953, 'Describing Uncertainties in Single Sample Experiments,' Mech. Eng., Vol. 75, pp. 3~8
8 Nikuradse, J., 1950, 'Laws for Flow in Rough Pipes,' NACA TM, 1292
9 Rhee, D. H., Nam, Y. W. and Choi, H. H., 2004, 'Heat/Mass Transfer Characteristics on Rib-Roughened Surface for Impingement/ Effusion Cooling System with Initial Crossflow,' Trans. of the KSME(B), Vol. 28, No. 3, pp. 338~348   과학기술학회마을   DOI   ScienceOn
10 Kukreja, R. T., Lau, S. C., McMillin, R. D. and Chandra, P. R., 1991, 'Effects of Length and Configuration of Transverse Discrete Ribs on Heat Transfer and Friction for Turbulent Flow in a Square Channels,' ASME/JSME Thermal Engineering Joint Conference, Vol. 3, pp. 213~218, Reno, Nevada
11 Han, J. C., Ou, S., Park, J. S. and Lei, C. K., 1989, 'Augmented Heat Transfer in Rectangular Channels of Narrow Aspect Ratios with Rib Turbulators,' Int. J. Heat Mass Transfer, Vol. 32, pp. 1619~1630   DOI   ScienceOn
12 Lau, S. C., McMillin, R. D. and Han, J. C., 1991, 'Turbulent Heat Transfer and Friction in a Square Channel with Discrete Rib Turbulators,' J. Turbomachinery, Vol. 113, pp. 360~366   DOI
13 Lau, S. C., McMillin, R. D. and Han, J. C., 1991, 'Heat Transfer Characteristics of Turbulent Flow in a Square Channel with Angled Discrete Ribs,' J. Turbomachinery, Vol. 113, pp. 367~374   DOI
14 Han, J. C., Park, J. S. and Lei, C. K., 1985, 'Heat Transfer Enhancement in Channels with Turbulence Promoters,' J. Eng. Gas Turbine Powers, Vol. 107. pp. 629~635
15 Han, J. C. and Park, J. S., 1988, 'Developing Heat Transfer in Rectangular Channels with Rib Turbulators,' Int. J. Heat Mass Transfer, Vol. 31, pp. 183~195   DOI   ScienceOn
16 Han, J. C., 1988, 'Heat Transfer and Friction Characteristics in Rectangular Channels with Rib Turbulators,' J. Heat Transfer, Vol. 110, pp. 321∼328   DOI