Experimental investigations of the parameters of liquid evaporation process under acoustic-vacuum exposure

Experimental investigations of the process of liquid evaporation under conditions of acoustic-vacuum exposure were conducted. Based on the obtained values of the evaporating liquid mass and the liquid vapor pressure in a closed container, a resonance effect is revealed. The emergence of the resonance effect is characterized by the active boiling of the liquid when the frequency of the system "steam-gas mixture + cupola + vacuum chamber + liquid layer" coincides with the frequency of the acoustic exposure under conditions of reduced external pressure. To measure the vapor pressure of the liquid, a cupola was introduced into the experimental stand, which makes it possible to increase the vapor pressure of the liquid and register its value with the equipment used. The calibration characteristic of laboratory scales is obtained as a dependence of the change of cargo weight on the pressure values in the vacuum chamber. Using the obtained calibration characteristic of laboratory scales operating under acoustic-vacuum exposure, the values of liquid mass change are obtained at different values of external pressure in the vacuum chamber. The results obtained can be applied in the field of acoustic-vacuum drying and cleaning of different surfaces.