An Experimental Investigation of the Thermally Induced Flow Oscillations in Two-Phase Systems

[+] Author and Article Information
P. Saha

Nuclear Energy Systems Division, General Electric Company, San Jose, Calif.

M. Ishii

Reactor Analysis and Safety Division, Argonne National Laboratory, Argonne, Ill.

N. Zuber

Reactor Safety Research, U. S. Nuclear Regulatory Commission, Washington, D. C.

J. Heat Transfer 98(4), 616-622 (Nov 01, 1976) (7 pages) doi:10.1115/1.3450609 History: Received August 17, 1976; Online August 11, 2010


An experimental study on the onset of thermally induced two-phase flow oscillations has been carried out in a uniformly heated boiling channel using Freon-113 as the operating fluid. The effects of inlet subcooling, system pressure, inlet and exit restrictions, and inlet velocity have been studied. The experimental data have been compared with the equilibrium as well as the nonequilibrium theory including the effect of subcooled boiling. It has been found that the effect of thermal nonequilibrium should be included in a theoretical model for accurate prediction of the onset and the frequency of thermally induced flow oscillations. A simplified stability criterion has also been presented and compared with the experimental data.

Copyright © 1976 by ASME
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