Open AccessSome peculiarities of superheated water flow in contracting-expanding nozzles and their influence on droplet dimension distribution in an atomized water plume
Author(s) -
V. I. Zalkind,
Yu. A. Zeigarnik,
V L Nizovskiy,
L V Nizovskiy,
S S Schigel
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1359/1/012034
Subject(s) - flashing , superheating , mechanics , bubble , nozzle , radius , surface tension , thermodynamics , dimensionless quantity , critical radius , weber number , mach number , diffuser (optics) , materials science , physics , reynolds number , turbulence , spheres , optics , light source , computer security , astronomy , computer science , metallurgy
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.