Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Multiphase Science and Technology
SJR: 0.183 SNIP: 0.483 CiteScore™: 0.5

ISSN Imprimer: 0276-1459
ISSN En ligne: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v13.i1-2.20
25 pages

HEAT TRANSFER IN FORCED-CONVECTIVE TWO-PHASE FLOWS UNDER MICROGRAVITY CONDITIONS: ANALYSIS

R. W. Rite
Research and Development Division, TRANE Co., Wisconsin, USA
Kamiel S. Rezkallah
Microgravify Research Group, College of Engineering, University of Saskatchewan, Saskatoon, Mechanical Engineering Dept. University of Manitoba, Winnipeg, Canada

RÉSUMÉ

Experimental heat transfer data collected on-board NASA’s КС-135 reduced gravity aircraft for two-phase, two-component flows in vertical, upward, co-current flow through a 9.53 mm circular tube are reported and analyzed. Data were collected for water-air flow as well as for three glycerol/water and air mixtures. It was found that for low liquid flow rates reduced gravity retards the heat transfer coefficient by up to 50% at the lowest gas qualities (bubbly and slug flow regimes). As the gas quality is increased (transition to annular flow), the difference between the 1-G and m-G heat transfer coefficients becomes smaller. At higher liquid velocities, an increase in the gas quality results in the m-G heat transfer coefficients being greater than those at 1-G by approximately 10%, which is within the uncertainty of the measurements. The influence of gravity was found to be both a single-phase effect and a two-phase effect. Mixed convection in the liquid phase affects the heat transfer coefficients, and reduced gravity has a substantial influence on the interfacial surface between the two phases. New correlations for two-phase heat transfer have been developed. These correlations include the effect of flow regime and gravity on the two phases by incorporating the non-dimensional groups of Weber, Froude, and Morton numbers. From microgravity and 1-G data, the correlations developed were found to have an uncertainty of, at most, 25% for ReST < 2300, and 15% for higher liquid superficial Reynolds numbers.


Articles with similar content:

ESTIMATION OF MAJOR CORRELATIONS FOR FRICTIONAL PRESSURE DROP IN GAS-LIQUID TWO-PHASE FLOW IN HORIZONTAL PIPES USING PREDICTED FLOW REGIME INFORMATION
Multiphase Science and Technology, Vol.12, 2000, issue 3&4
Avram Bar-Cohen, Arthur E. Bergles, Satoru Momoki
FORCED CONVECTION BOILING AND CONDENSATION OF AMMONIA IN MICROGRAVITY
International Heat Transfer Conference 13, Vol.0, 2006, issue
A. Larue de Tournemine, Olivier Lebaigue, Catherine Colin
BOILING HEAT TRANSFER IN ANNULAR FLOW
International Heat Transfer Conference 7, Vol.9, 1982, issue
P. B. Whalley, Geoffrey F. Hewitt, Y. Aounallah , D. B. R. Kenning
FUNDAMENTAL STUDY OF INTERFACIAL WAVES IN STRATIFIED FLOW
Dynamics of Two-Phase Flows, Vol.1, 1988, issue
S. Inoue, Y. Murai, M. Ozawa, Tadashi Sakaguchi, Y. Shiomi
COCURRENT GAS-LIQUID FLOW IN METAL FOAM: AN EXPERIMENTAL INVESTIGATION OF PRESSURE GRADIENT
Journal of Porous Media, Vol.13, 2010, issue 6
Lounes Tadrist, Frederic Topin, Jerome Vicente, Jean-Philippe Bonnet