FLOW CHARACTERISTICS OF GAS-LIQUID 2-PHASE ANNULAR-FLOW UNDER MICROGRAVITY (EXPERIMENTAL RESULTS UTILIZING A DROP TOWER)

Citation
T. Fujii et al., FLOW CHARACTERISTICS OF GAS-LIQUID 2-PHASE ANNULAR-FLOW UNDER MICROGRAVITY (EXPERIMENTAL RESULTS UTILIZING A DROP TOWER), JSME international journal. Series B, fluids and thermal engineering, 41(3), 1998, pp. 561-567
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Engineering, Mechanical",Thermodynamics
ISSN journal
1340-8054
Volume
41
Issue
3
Year of publication
1998
Pages
561 - 567
Database
ISI
SICI code
1340-8054(1998)41:3<561:FCOG2A>2.0.ZU;2-B
Abstract
In order to predict various phenomena related to flow and heat transfe r in space, it is necessary to carry out experiments under microgravit y. The present work is concerned with the characteristics of gas-liqui d two-phase annular flow under microgravity condition utilizing a drop tower. The experiments were carried out in a vertical transparent acr ylic tube of 10.5 mm I.D. and 200 mm length, using a mixture of gaseou s nitrogen (GN2) and water as the working fluid, in an annular flow re gion. The mean void fraction, pressure drop and liquid film thickness under microgravity were obtained and compared with the results of a gr ound test. It was found that the roughness of the liquid film surface was less and the mean liquid film thickness became greater under micro gravity than under normal gravity.