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U.S. Department of Energy
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BASIC EXPERIMENTAL STUDIES OF BOILING FLUID FLOW AND HEAT TRANSFER AT ELEVATED PRESSURES. Monthly Progress Report, December 1962

Technical Report ·
OSTI ID:4733680
Twenty-four instrumented burnout points and one intentional physical burnout run are reported for a composite tubular geometry (inner heater tube M = 1.478 in. outer heater tube OD = 2.085 in., housing tube ID = 2.90 in. and heated length = 77 in.) with vertical upflow of boiling water at 1000 psia. The ranges of variables studied were: average mass velocities from 0.5 to 2.0 x 10/sup 6/ lb/ hr-ft/sup 2/, average exit conditions from 14 deg F subcooled to 29% steam quality and average instrumented burnout heat fluxes as high as 0.96 x 10/sup 6/ Btu/hr-ft/sup 2/. As in previous burnout tests with the tubular geometry a very strong reverse mass velocity effect was observed in the data. Contrary to the expected performance in all cases burnout was reached first in the inner channel. At low total flow rates (less than about 50 GPM) and high heat fluxes (above approximately 600,000 Btu/hr-ft/sup 2/) a region of test section pressure fluctuations was abruptly encountered during several runs. The transition in and out of this region appeared to follow a line of zero average exit quality. (auth)
Research Organization:
Columbia Univ., New York. Engineering Research Labs.
NSA Number:
NSA-17-008328
OSTI ID:
4733680
Report Number(s):
TID-17702; MPR-XIII-12-62
Country of Publication:
United States
Language:
English