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Abstract:
This paper presents the heat transfer of subcooled water in swirl flow under high heat fluxes with respect to the heat removal technologies for the divertors in the International Thermonuclear Experimental Reactor (ITER). The experiments were conducted in a vertical circular tube that was heated uniformly with a large AC power supply. A twisted tape with a twist ratio of 2 or 4 was inserted into the circular tube to induce the swirl flow. The test parameters were as follows: heat flux q = 5-19.5 MW/m(2); system pressure P = 3, 4.2, 5 MPa; mass flux G = 6000, 8000, 10,000 kg/(m(2) s); and inlet bulk temperature T-b.i= 50-200 degrees C. The heat transfer coefficients and boiling curves are obtained from single-phase forced convection to fully developed nucleate boiling. The influences of mass flux, heat flux, system pressure, thermodynamic quality, and inlet subcooling on heat transfer are discussed in detail. Special attention is paid to the effect of the twisted tape on subcooled heat transfer. More importantly, a wide set of heat transfer correlations are evaluated on the basis of our experimental data, and relevant recommendations for engineering applications are made according to their prediction accuracies. (C) 2015 Elsevier Inc. All rights reserved.
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EXPERIMENTAL THERMAL AND FLUID SCIENCE
ISSN: 0894-1777
Year: 2015
Volume: 68
Page: 11-21
2 . 1 2 8
JCR@2015
3 . 2 3 2
JCR@2020
ESI Discipline: ENGINEERING;
ESI HC Threshold:138
JCR Journal Grade:2
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 17
SCOPUS Cited Count: 31
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 6
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