DOWNFLOW BOILING AND NONBOILING HEAT TRANSFER IN A UNIFORMLY HEATED TUBE (thesis)

Technical Report · Fri Jan 01 04:00:00 EST 1960

DOI:https://doi.org/10.2172/4148810· OSTI ID:4148810

Sani, R. L.

Local heat-transfer coefficients in forced convection, downflow boiling, and nonboiling were measured by use of an electrically heated type-304 stainless steel tube (0.7194 in. i.d. x 0.7502 in. o.d. x 68.0 in. long). Average forcedconvection heat-transfer coefficients in turbulent onephase flow and local total pressure gradients in two-phase flow were also determined. Data were obtained for the boiling of distilled water with mass fluxes of 51 to 165 lb/sec sq ft, heat fluxes from 13.8 x 10/sup 3/ to 49.8 x 10/sup 3/ BTU/hr sq ft, pressures at 15.8 to 30.9 psia, and qualities up to 14%. The boiling heat transfer data were compared with the correlations proposed by Mumm, Dengler, Rohsenow, and Grossman and Schrock. No attempt was made to formulate a new correlation because of the limited range of conditions investigated. The nonboiling heat transfer data were compared to the Dittus-Poelter and SiederTate correlations. The local total pressure gradients in two-phase flow were correlated by the Martinelli parameter, X/sub tt/, for turbulent two-phase flow. (auth)

• Research Organization: California Univ., Berkeley, CA (US). Lawrence Radiation Lab.
• DOE Contract Number: W-7405-ENG-48
• NSA Number: NSA-14-011723
• OSTI ID: 4148810
• Report Number(s): UCRL-9023
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
CONVECTION
DISTRIBUTION
ELECTRICITY
ENGINEERING AND EQUIPMENT
FLOW RATE
FORCED CONVECTION
HEAT FLOW
HEAT TRANSFER
HEATING
LIQUID FLOW
LIQUIDS
MATHEMATICS
MIXING
PRESSURE
STABILITY
STAINLESS STEELS
TUBES
TURBULENCE
WATER