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Thermophysics and Aeromechanics

2009 year, number 2

Adiabatic evaporation of binary liquid mixtures on the porous ball surface

V.I. Terekhov1, N.E. Shishkin2
1 Kutateladze Institute of Thermophysics, SB RAS,
2 Kutateladze Institute of Thermophysics, SB RAS,
Keywords: heat transfer, binary mixtures, adiabatic evaporation, sphere
Pages: 239-245


Measured data for the temperature of a porous spherical surface to which an evaporating binary liquid mixture was supplied are reported. In the experiments, solutions of ethyl and methyl alcohols in water, and also solutions of acetone in water, were used. The concentration of mixture components was varied throughout the widest possible range of XL = 0−1, and the temperature of dry air flow past the sphere was in the range t0 = 15−300 °C. In the present study, a strong influence of the composition of the mixtures on their adiabatic evaporation temperature was established. In the heat- and mass-transfer process, the air temperature is also of paramount importance. An experimental correlation is obtained which generalizes data on adiabatic evaporation temperature in a broad range of component concentrations and temperatures for the experimentally examined binary liquid mixtures.