Ejector performance in a co-current gas-liquid downflow bubble column

Performance of an ejector system in a two-phase downflow bubble column has been evaluated with respect to the energy dissipation during coaxial flow of liquid and gas in a parallel throat and divergent diffuser and during gas-liquid mixing in the column. Experiments were carried out in a 51.6 mm i.d. column with five different nozzles. Three systems, namely air-water, air-kerosene and air-paraffin were used. Correlations have been developed for predicting the ejector loss coefficient as well as mixing loss coefficient as a function of different physical and dynamic variables of the system.