Abstract
New calculation data on superheated metastable water flow in atomizing Laval type nozzles is presented. The calculating model is discussed on the assumption of predominating nucleation role in liquid atomization. The Mach number variation is presented for diffuser part of the nozzle taking into account the sound velocity variation in a vapor-liquid system. The new criterion, based upon experimental and calculating data, which determines the reaching of full-flashing regime, is proposed for contracting-expanding nozzles. The submicron mass fraction is considered to be a function of dimensionless parameter, which is the critical radius bubble surface tension energy ratio to chemical potential of phase transition for critical bubble radius at certain pressure drop.
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