Accession Number:

AD0631280

Title:

HEAT TRANSFER DURING SUBCOOLED BOILING.

Descriptive Note:

Final rept., 16 Feb 59-14 Feb 66,

Corporate Author:

STANFORD UNIV CALIF DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1966-02-14

Pagination or Media Count:

4.0

Abstract:

1 Average heat transfer coefficients on a uniformly heated cylinder. Experimental data were presented for a Reynolds number range from 40 to 100,000 and for Prandtl numbers from 1 to 300. The effects of temperature differences large enough to produce significant changes in viscosity across the boundary layer were correlated in terms of a viscosity ratio. 2 Local heat transfer coefficients on a uniformly heated cylinder. Analysis of the heat transfer in the laminar boundary layer using integral methods was compared with original experimental measurements of the local heat transfer coefficients around a cylinder. 3 Critical heat flux for nearly saturated water flowing normal to a cylinder. Visual and photographic observations were used to construct a physical model of transition from nucleate to film boiling. 4 Critical heat flux for subcooled water flowing normal to a cylinder. The maximum flux which can be accommodated in subcooled nucleate boiling varies directly with the velocity and subcooling and inversely with a fractional power of the heater diameter.

Subject Categories:

  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE