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界面现象 及传热
ESCI SJR: 0.258 SNIP: 0.574 CiteScore™: 0.8

ISSN 打印: 2169-2785
ISSN 在线: 2167-857X

界面现象 及传热

DOI: 10.1615/InterfacPhenomHeatTransfer.2016016009
pages 71-80

STABILITY OF THE GAS CORE OF A CYCLONIC TWO-PHASE SEPARATOR IN MICROGRAVITY

Adel Kharraz
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106
Ming-Fang Kang
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106
Yasuhiro Kamotani
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106

ABSTRACT

A microgravity experiment was designed to investigate the performance of a cyclonic two-phase separator. Surface tension effects could become important in microgravity, which adversely affects the separator performance. In the present study, the collapse of the gas core due to surface tension was investigated analytically as well as numerically. A control volume analysis and a volume-of-fluid−based computational fluid dynamics (CFD) simulation were employed to determine the condition for the gas core collapse. The predicted critical Weber numbers by both methods agree reasonably well. They predict that the critical Weber number is on the order of unity in the parametric range investigated herein. For practical purposes, the critical condition is also expressed in terms of the injection Weber number.


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