Atomization of Superheated Water Through a Divergent Nozzle
V. I. Zalkind, Yu. A. Zeigarnik, V. L. Nizovskii, L. V. Nizovskii, S. S. Shchigel'
Joint Institute for High Temperatures, RAS, Moscow, Russia
Keywords: superheated water, metastable state, fine spray, dispersion characteristics, bimodal distribution, spray jet, explosive boiling, two-phase flow, scattering of monochromatic radiation
Abstract
The atomization of metastable superheated water injected into the atmosphere from a convergent-divergent nozzle at a temperature of 240-260 °С was studied experimentally. The dispersion composition of the spray jet has a bimodal character with a predominance of submicron droplets, whose proportion increases with increasing temperature and reaches 80% at the nozzle outlet at a water temperature of 260 °С. The influence of droplet coagulation on the distribution of the proportion of large droplets along the length of the spray jet was estimated.
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