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U.S. Department of Energy
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INVESTIGATION OF FORCED-CONVECTION NUCLEATE BOILING OF WATER FOR NOZZLE COOLING AT VERY HIGH HEAT FLUXES

Technical Report ·
OSTI ID:4776774
The nonuniform axial heat-flux distribution typical of a very high temperature flow nozzle was simulated by resistance heating of variable-wall- thickness lnconel tubes. The coolant water flowed through the constant- insidediameter test sections at flow rates ranging from 0.45 x 10/sup 4/ to 1.27 x 10/sup 4/ lb/(sq ft)(sec)(inlet velocities of 73 to 204 ft/ sec). Results are presented for nonboiling forced convection, nucleate-boiling forced convection at local heat fluxes up to 11,200 Btu/(sq ft)(sec), burnout, and pressure drop. All results are compared with existing correlations. The solution for the temperature distribution in a resistance-heated variable-wall-thickness tube and the appropriate heat-transfer relations are derived. (auth)
Research Organization:
National Aeronautics and Space Administration. Lewis Research Center, Cleveland
NSA Number:
NSA-16-031795
OSTI ID:
4776774
Report Number(s):
NASA-TN-D-1214
Country of Publication:
United States
Language:
English