A STUDY ON CRITICAL HEAT FLUX MECHANISMS AND THE TRANSITION TO FILM BOILING
A STUDY ON CRITICAL HEAT FLUX MECHANISMS AND THE TRANSITION TO FILM BOILING
Loading...
Files
Publication or External Link
Date
2015
Authors
Thompson, Jason Christopher
Advisor
Kim, Jungho
Citation
DRUM DOI
Abstract
An infrared (IR) thermometry technique was used to study the critical heat flux (CHF) and the transition to film boiling during pool boiling and submerged jet impingement. Highly resolved temporal and spatial heat transfer measurements were obtained by measuring temperature distributions on the surfaces of an IR transparent test heater with a mid-range IR camera. Measurements were obtained for the nucleate boiling regime, CHF, early transition boiling regime, and through the transition to film boiling. The local heat flux, temperature, and dryout characteristics were used to compare the submerged jet and pool boiling conditions. It was found that similar mechanisms govern CHF and the transition to film boiling. This finding supports that the hydrodynamic models are incorrect, and CHF is governed by the surface characteristics and the dynamics of the microlayer.