Critical Heat Flux on a Horizontal Cylinder in an Upward Subcooled and Low-Quality Two-Phase Crossflow

[+] Author and Article Information
M. K. Jensen, M. Pourdashti

Department of Mechanical Engineering, University of Wisconsin—Milwaukee, Milwaukee, WI 53201

J. Heat Transfer 108(2), 441-447 (May 01, 1986) (7 pages) doi:10.1115/1.3246943 History: Received December 07, 1984; Online October 20, 2009


An experimental investigation has been conducted to determine the low-velocity critical heat flux (CHF) behavior on a single horizontal tube in a subcooled and low-quality two-phase crossflow of R-113. Data were obtained over a range of velocities (up to 0.3 m/s), subcooling (0 to 14 K), and qualities (0 < x < +30 percent) at two pressures. There was a linear decrease in the CHF with increasing quality up to about 10 percent quality; then, due to a flow regime transition, the CHF remained relatively constant. A correlation has been developed which predicted well the subcooled and low-quality region CHF condition in the linearly decreasing portion of the curve. Data from the literature are also predicted well.

Copyright © 1986 by ASME
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