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Counter-Current Air-Water Flow in Narrow Rectangular Channels With Offset Strip Fins  

Kim, Byong-Joo (Department of Mechanical and System Design Engineering, Hongik University)
Sohn, Byung-Hu (Department of Mechanical and System Design Engineering, Hongik University)
Koo, Kee-Kahb (Department of Chemical Engineering, Sogang University)
Publication Information
Journal of Mechanical Science and Technology / v.17, no.3, 2003 , pp. 429-439 More about this Journal
Abstract
Counter-current two-phase flows of air- water in narrow rectangular channels with offset strip fins have been experimentally investigated in a 760 mm long and 100 mm wide test section with 3.0 and 5.0 mm gap widths. The two-phase flow regime, channel-average void fractions and two-phase pressure gradients were studied. Flow regime transition occurred at lower superficial velocities of air than in the channels without fins. In the bubbly and slug flow regimes, elongated bubbles rose along the subchannel formed by fins without lateral movement. The critical void fraction for the bubbly-to-slug transition was about 0.14 for the 3 mm gap channel and 0.2 for the 5 mm gap channel. respectively. Channel-average void fractions in the channels with fins were almost the same as those in the channels without fins. Void fractions increased as the gap width increased, especially at high superficial velocity of air. The presence of fins enhanced the two-phase distribution parameter significantly in the slug flow, where the effect of gap width was almost negligible. Superficial velocity of air dominated the two-phase pressure gradients. Liquid superficial velocity and channel gap width has only a minor effect on the pressure gradients.
Keywords
Counter-Current Two-phase Flow; Narrow Rectangular Channel; Offset Strip Fins; Flow Regime; Void Fraction; Two-Phase Pressure Gradient;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Carey, V. P. and Mandrusiak, G. D., 1986, 'Annular Film-flow Boiling of Liquids in a Partially Heated Vertical Channel with Offset Strip Fins,' Int. J. Heat Mass Transfer, Vol. 29, No. 6, pp. 972-939   DOI   ScienceOn
2 Ghiaasiaan, S. M., Turk, R. E. and AbdelKhalik, S. I., 1995, 'Countercurrent Flow Limitation in Inclined Channels with Bends,' Nucl. Sci. Engng., Vol. 152, pp. 379-388
3 Iida, Y. and Takahashi, K., 1976, 'Gas-liquid Two-Phase Flow through Channels with Narrow Spaces,' Kagaku Kagaku Ronbunshu, Vol. 2, pp. 228-234   DOI
4 Ishii, M., 1977, 'One-dimensional Drift Flux Model and Constitutive Equations for Relative Motion between Phases in Various Two-phase Flow Regimes,' ANL Report 77-47
5 Kim, B. J., Jeong, E. S. and Sohn, B. H., 2001B, 'Void fraction and Pressure Gradient of Counter-current Two-phase Flow in Narrow Rectangular Channels,' Transaction of SAREK, Vol. 13, No. 4, pp. 304-311   과학기술학회마을
6 Kline, S. J., 1985, 'The Purposes of Uncertainty Analysis,' J. Fluids Eng., Vol. 107, pp. 153-160   DOI
7 Manglik, R. M. and Bergles, A. E., 1995, 'Heat Transfer and Pressure Drop Correlation for the Rectangular Offset Strip Fin Compact Heat Exchangers,' Exp. Thermal Fluid Sci., Vol. 10, pp. 171-180   DOI   ScienceOn
8 Kim, B. J., Sohn, B. H. and Jeong, S., 2001A, 'Two-phase Flow Regimes for Counter-current Air-water Flows in Narrow Rectangular Channels,' KSME International Journal, Vol. 15, No. 7, pp. 941-950   과학기술학회마을
9 Mandrusiak, G. D., Carey V. P. and Xu, X., 1988, 'An Experimental Study of Convective Boiling in a Partially Heated Horizontal Channel with Offset Strip Fins,' J. Heat Transfer, Vol. 110, pp. 229-236   DOI
10 Mishima, K., Hibiki, T. and Nishihara, H., 1993, 'Some Characteristics of Gas-liquid Flow in Narrow Rectangular Ducts,' Int. J. Multiphase Flow, Vol. 19, pp. 115-124   DOI   ScienceOn
11 Moriyama, K. and Inoue, A., 1991, 'Study on Two-phase Flow in Very Narrow Channels,' In Proc. 28th National Heat Transfer Symposium of Japan, Vol. 3, pp. 763-765
12 Osakabe, M. and Kawasaki, Y., 1989, 'Top Flooding in Thin Rectangular and Annular Passages,' Int. J. Multiphase Flow, Vol. 15, No. 5, pp. 747-754   DOI   ScienceOn
13 Sadatomi, Y., Sato, Y. and Saruwatari, S., 1982, 'Two-phase Flow in Vertical Noncircular Channels,' Int. J. Multiphase Flow, Vol. 8, pp. 641-655   DOI   ScienceOn
14 Lee, H. J. and Lee, S. Y., 1999, 'An Experimental Study on the Horizontal Two-phase Flow Patterns within Rectangular Channels with Small Fap Heights,' Transaction of KSME, Vol. 23, No. 4, pp. 492-501   과학기술학회마을
15 Sudo, Y., 1980, 'Estimation of Average Void Fraction in Vertical Two-phase Flow Channel under Low Liquid Velocity,' J. Nucl. Sci. Technol., Vol. 17, No. 1
16 Xu, X. and Carey, V. P., 1987, 'An Experimental Study of the Effects of Channel Orientation on Convective Boiling in a Partially Heated Cross-ribbed Channel,' Proc. 2nd ASME-JSME Thermal Engineering Joint Conf., Honolulu, Hawaii, Vol. 3, pp. 141-146
17 Taitel, Y. and Barnea, D., 1983, 'Countercurrent Gas-liquid Vertical Flow, Model for Flow Pattern and Pressure Drop,' Int. J. Multiphase Flow, Vol. 9, pp. 637-647   DOI   ScienceOn
18 Wallis, G. B., 1969, 'One Dimensional Two-phase Flow,' McGraw-Hill, New York
19 Wilmarth, T. and Ishii, M., 1994, 'Two-phase Flow Regimes in Narrow Rectangular Vertical and Horizontal Channels,' Int. J. Heat and Mass Transfer., Vol. 37, pp. 1749-1758   DOI   ScienceOn
20 Mishima, K. and Ishii, I., 1984, 'Flow Regime Transition Criteria for Two-Phase Flow in Vertical Tubes,' Int. J. Heat and Mass Transfer, Vol. 27, pp. 723-734   DOI   ScienceOn
21 Yamaguchi, K. and Yamazaki. Y., 1982, 'Characteristics of Countercurrent Gas-liquid Two-phase Flow in Vertical Tubes,' J. Nucl. Sci. Technol., Vol. 19, pp. 985-996   DOI   ScienceOn
22 Souidi, N. and Bontemps, A., 2001, 'Countercurrent Gas-liquid Flow in Plate-fin Heat Exchangers with Plain and Perforated Fins,' Int. J. Heat and Fluid Flow, Vol. 22, pp. 450-459   DOI   ScienceOn