Dynamics of propagation of the self-sustaining evaporation front in a mixture of Freons under the natural convection conditions

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 C = 0.62). At a fixed value of the temperature head in the range of high values of Δ T , liquid subcooling relative to saturation line leads to a decrease in the velocity of evaporation front propagation.