Physical modeling of motion and evaporation of polydisperse water droplets in a high-enthalpy air flow.

This paper presents the results of a study aimed at obtaining new experimental data on the regularities of evaporation of droplets of polyfractional composition in a high-enthalpy gas flow. This study considers the features of heating and subsequent vaporization of water droplets with diameters of 5...100 μm in an air flow with initial temperature up to ∼600 K and velocity up to ∼100 m/s at subcritical Weber numbers. The description of the laboratory setup equipped with laser-shadow means of diagnostics of two-phase flows and the proposed methodology of processing of the registered parameters are presented. On the basis of the conducted experiments, quantitative indicators of the intensity of the process of evaporation of polydisperse water droplets in the air flow are determined. The database of experimental data on the motion and evaporation of water droplets in the air flow, which has been developed according to the available literature sources, has been supplemented with new results, which makes it possible to clarify the corresponding physical and mathematical models. The results obtained can be used in planning and conducting subsequent studies. [ABSTRACT FROM AUTHOR]