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-releas...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2017-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://doi.org/10.1051/matecconf/201711508007 |
| Summary: | 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. |
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| ISSN: | 2261-236X |