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RESEARCH PAPERS

Choked Expansion of Subcooled Water and the I.H.E. Flow Model

[+] Author and Article Information
R. L. Collins

Department of Mechanical Engineering, University of Louisville, Louisville, Ky.

J. Heat Transfer 100(2), 275-280 (May 01, 1978) (6 pages) doi:10.1115/1.3450795 History: Received September 02, 1977; Online August 11, 2010

Abstract

The isentropic, homogeneous, equilibrium (I.H.E.) model for two-phase flows is discussed with special regard to recent experimental and theoretical information. Over the past years, the I.H.E. model has been misrepresented many times and its deficiencies have been overstated. More recent studies have indicated that the I.H.E. model may be quite valid for certain types of flows and this paper is presented to amplify these results. It is noted here that the I.H.E. model, under certain reservoir conditions, will over-predict flow rates, that an essential discontinuity of the I.H.E. sound speed may play an important role in choking, that the mass flux-pressure derivative is not continuous at the saturation line, and that the maximum error of the I.H.E. flow rate is about 60 percent at the liquid saturation line.

Copyright © 1978 by ASME
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