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RESEARCH PAPERS

Hydrodynamic Stability of Inverted Annular Flow in an Adiabatic Simulation

[+] Author and Article Information
G. De Jarlais, M. Ishii

Reactor Analysis and Safety Division, Argonne National Laboratory, Argonne, IL 60439

J. Linehan

Department of Mechanical Engineering, Marquette University, Milwaukee, WI 53233

J. Heat Transfer 108(1), 84-92 (Feb 01, 1986) (9 pages) doi:10.1115/1.3246909 History: Received November 07, 1983; Online October 20, 2009

Abstract

Inverted annular flow was simulated adiabatically with turbulent water jets, issuing downward from large aspect ratio nozzles, enclosed in gas annuli. Velocities, diameters, and gas species were varied, and core jet length, shape, breakup mode, and dispersed core droplet sizes were recorded at approximately 750 data points. Inverted annular flow destabilization led to inverted slug flow at low relative velocities, and to dispersed droplet flow at high relative velocities. For both of these transitions from inverted annular flow, core breakup length correlations were developed by extending work on free liquid jets to include this coaxial, jet disintegration phenomenon. The results show length dependence upon DJ , ReJ , WeJ , α, and WeG ,rel . Correlations for core shape, breakup mechanisms, and dispersed core droplet size were also developed, by extending the results of free jet stability, roll wave entrainment, and churn turbulent droplet stability studies.

Copyright © 1986 by ASME
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