An Equation for the Critical Mass Velocity of Homogeneous Vapor-Liquid Mixtures at Low Pressures

[+] Author and Article Information
K. Goldmann, R. Hankel, R. P. Stein

Development Division—NDA, United Nuclear Corporation, White Plains, N. Y.

J. Appl. Mech 31(3), 380-382 (Sep 01, 1964) (3 pages) doi:10.1115/1.3629651 History: Received September 12, 1962; Revised May 09, 1963; Online September 15, 2011


Equations have been developed expressing the critical mass velocity, (Gc )s , and the isentropic expansion coefficient, k, of a single-component, homogeneous vapor-liquid mixture at low pressures in terms of tabulated thermodynamic properties. With these parameters, two-phase flow relations can be developed which are analogous to the relations governing the flow of single-phase compressible fluids, most readily formulated in terms of Mach numbers. The computed values of k for saturated steam agree favorably with those reported in the literature of steam-turbine design.

Copyright © 1964 by ASME
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