Flashing Flow of Initially Subcooled Water in Convergent–Divergent Nozzles

[+] Author and Article Information
V. E. Schrock

Department of Nuclear Engineering, General Motors Corp., Warren, Mich.

E. S. Starkman

Department of Mechanical Engineering, and Environmental Activities, General Motors Corp., Warren, Mich.

R. A. Brown

Department of Mechanical Engineering, University of California, Berkeley, Calif.

J. Heat Transfer 99(2), 263-268 (May 01, 1977) (6 pages) doi:10.1115/1.3450679 History: Received February 22, 1977; Online August 11, 2010


This paper presents results from a research program conducted a number of years ago on the problem of flashing flow of water in nozzles. In a previous paper [1] we presented results for the case of stagnation states in the low quality two-phase region. The present paper reports results for stagnation states in the subcooled region at pressures up to 9.05 × 103 kN/m2 and subcooling from 0 to 60° C. Pressure profiles and flow rates are reported. The results are compared with limiting cases of Bernoulli flow (meta-stable liquid flow) and homogeneous equilibrium flow. As expected neither was able to predict the experimental results. A two-step model based upon nucleation delay, “discontinuous” transition to two-phase flow followed by frozen composition gave reasonable predictions of the flowrates and pressure profiles in the convergent section.

Copyright © 1977 by ASME
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