BASIC STUDIES IN HEAT TRANSFER AND FLUID FLOW. Quarterly Progress Report IX-QPR-3-60 for period July 1, 1960 to September 30, 1960
The resistance and temperature coefficients of "E.C." films (copper film covered with MgF/sub 2/ film) were measured. The third test section heater (heated portion of each test section consisted of a stainless-steel tube 0.295 in. OD x 0.025 in. wall x 10.5 in. long) was used to determine the critical heat flux density of the heater using the pulse heating technique at conditions of 0.4 ft/ sec water velocity, 170 ts F inlet temperature, and 17 psia. Burn- out occurred at a heat flux of 750,000 Btu/hr/sq ft. Sustained, but not stable, film boiling was achieved in a fourth test section heater using the pulse heating technique. A smooth vapor film was obtained momentarily at relatively low steadystate heat fluxes over a significant portion of the tube surface. In studies on boiling water flow patterns, difficulties are encountered in finding a satisfactory method of thermally insulating the back side of the heating strip to prevent boiling from occurring beneath the strip. (For preceding period see TID- 6035.) (C.J.G.)
- Research Organization:
- Columbia Univ., New York. Engineering Research Labs.
- DOE Contract Number:
- AT(30-3)-187
- NSA Number:
- NSA-15-008960
- OSTI ID:
- 4105427
- Report Number(s):
- TID-6765
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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