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Title: Characteristics of heat-transfer crisis during boiling of alkali metals and organic fluids under free convection conditions at reduced pressure

Abstract

From 4th international seminar on heat and mass transfer in liquid metals; Trojir, Yugoslavia (6 Sep 1971). See CONFResults are presented from experiments which measured the critical heat flux for the boiling of alkali metals, cesium and potassium, under free convection at pressures from 0.04 bars and for the boiling of ethanol in the pressure range from 0.05 to 2.5 bars. One test with three organic fluids, benzene, carbon tetrachloride, and ethanol, measured the critical heat flux as a function of heater diameter. Boiling and critical heat flux on surfaces greatly depleted of nucleation centers were also investigated. Photographs of the boiling process showed that, in addition to ordinary bubbles, an unstable vapor film was formed and destroyed on the surface. From this it was concluded that unstable boiling consists of a combination of ordinary nucleate boiling and volumetric flashing of the superheated layer on the heated surface and that the critical heat flux is strongly influenced by the condition of the surface. (LCL)

Authors:
; ;  [1]
  1. ed.
Publication Date:
Research Org.:
Inst. of Thermophysics, Novosibirsk, USSR
OSTI Identifier:
4439695
NSA Number:
NSA-29-000299
Resource Type:
Conference
Resource Relation:
Conference: 4. international seminar on heat and mass transfer in liquid metals, Trojir, Yugoslavia, 6 Sep 1971; Other Information: See CONF-710942--. Orig. Receipt Date: 30-JUN-74; Related Information: Progress in heat and mass transfer. Vol. 7
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
N42300* -Engineering-Heat Transfer & Fluid Flow; *BENZENE- CRITICAL HEAT FLUX; *CARBON TETRACHLORIDE- CRITICAL HEAT FLUX; *CESIUM- CRITICAL HEAT FLUX; *ETHANOL- CRITICAL HEAT FLUX; *POTASSIUM- CRITICAL HEAT FLUX; BOILING; BUBBLE GROWTH; FILMS; HEATERS; PRESSURE DEPENDENCE; SIZE; SURFACES; VAPORS

Citation Formats

Avksentyuk, B P, Mamontova, N N, and Dwyer, O E. Characteristics of heat-transfer crisis during boiling of alkali metals and organic fluids under free convection conditions at reduced pressure. Country unknown/Code not available: N. p., 1973. Web.
Avksentyuk, B P, Mamontova, N N, & Dwyer, O E. Characteristics of heat-transfer crisis during boiling of alkali metals and organic fluids under free convection conditions at reduced pressure. Country unknown/Code not available.
Avksentyuk, B P, Mamontova, N N, and Dwyer, O E. Mon . "Characteristics of heat-transfer crisis during boiling of alkali metals and organic fluids under free convection conditions at reduced pressure". Country unknown/Code not available.
@article{osti_4439695,
title = {Characteristics of heat-transfer crisis during boiling of alkali metals and organic fluids under free convection conditions at reduced pressure},
author = {Avksentyuk, B P and Mamontova, N N and Dwyer, O E},
abstractNote = {From 4th international seminar on heat and mass transfer in liquid metals; Trojir, Yugoslavia (6 Sep 1971). See CONFResults are presented from experiments which measured the critical heat flux for the boiling of alkali metals, cesium and potassium, under free convection at pressures from 0.04 bars and for the boiling of ethanol in the pressure range from 0.05 to 2.5 bars. One test with three organic fluids, benzene, carbon tetrachloride, and ethanol, measured the critical heat flux as a function of heater diameter. Boiling and critical heat flux on surfaces greatly depleted of nucleation centers were also investigated. Photographs of the boiling process showed that, in addition to ordinary bubbles, an unstable vapor film was formed and destroyed on the surface. From this it was concluded that unstable boiling consists of a combination of ordinary nucleate boiling and volumetric flashing of the superheated layer on the heated surface and that the critical heat flux is strongly influenced by the condition of the surface. (LCL)},
doi = {},
url = {https://www.osti.gov/biblio/4439695}, journal = {},
number = ,
volume = ,
place = {Country unknown/Code not available},
year = {1973},
month = {1}
}

Conference:
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