Effect of nozzle length on gas entrainment characteristics of vertical liquid jet

Abstract

For a vertical plunging liquid jet system using nozzles which had various values of the length-to-diameter ratio Ln/Dn characteristics such as the bubble penetration depth Z and the gas entrainment rate Qg were studied experimentally in an air-water system. When nozzles of an Ln/Dnratio exceeding 15 were employed the values of Z and Qg were confirmed to be almost independent of Ln/Dn. Empirical correlations for predicting Z and Qg are also presented. © 1987, The Society of Chemical Engineers, Japan. All rights reserved.