MATEC Web Conf.
Volume 115, 2017XXXIII Siberian Thermophysical Seminar (STS-33)
|Number of page(s)||4|
|Section||Chapter 8 Heat and mass transfer at phase changes and low-temperature thermophysics|
|Published online||10 July 2017|
Dynamics of propagation of the self-sustaining evaporation front in a mixture of Freons under the natural convection conditions
Kutateladze Institute of Thermophysics SB RAS, Lavrentiev ave. 1, 630090, Novosibirsk, Russia
* Corresponding author: firstname.lastname@example.org
The results of experimental studies on dynamics of propagation of the self-sustaining evaporation front at nonstationary heat release are presented in the paper. The experiments were carried out in a large volume at liquid saturation temperature and subcooling on a horizontal cylindrical heat-releasing surface with the diameter of 3 mm under nonstationary heat release. Freons R21, R114 and their mixtures were used as the working liquid. The experiments carried out in the range of concentrations of high-volatile component 0 < C < 1 showed that in the range of temperature heads corresponding to the loss of hydrodynamic stability of evaporation front interface, a higher evaporation front velocity corresponds to the higher content of volatile component R114. The temperature head corresponding to the initiation of the evaporation front has a minimal value at mixture concentration corresponding to the point of azeotrope (C = 0.62). At a fixed value of the temperature head in the range of high values of ΔT, liquid subcooling relative to saturation line leads to a decrease in the velocity of evaporation front propagation.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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