Criteria for Homogeneous Flash Boiling Atomization: An Experimental Approach
Yahav Moshkovich  1@  , Eran Sher  1@  , Yeshayahou Levy  1@  
1 : Technion - Israel Institute of Technology [Haifa]
Technion City, Haifa 3200003 -  Israel

When a liquid at a high pressure is driven out through an orifice to below its saturation pressure, flash-boiling of the homogeneous nucleation type may occur such that it results high quality liquid atomization. This is one of the most effective means of generating a fine and narrow-dispersed spray. The occurrence of flash boiling atomization involves kinetic stability problems that are characterized by two criteria which include a high enough initial liquid temperature and a high enough pressure drop rate. In this work, we used TSI's Phase Doppler Particle Analyzer (PDPA), to show the effect of the initial temperature and pressure on the spray cloud spatial pattern, droplets size distribution and velocity profile.


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