Plunging hollow jet aerators consist of a cone, which deflects water at the end of a discharging pipe through the annular opening forming a hollow jt on the water surface, thus creating high turbulence and entaring large quantities of air. The effciency E of the device was high ( .5 kg./kWh) for the small opening between the pipe and the cone. The significance of the present work is that, the results are expressed by a graph between the non-dimensional variables. the gap between the cone and the pipe; K L A, the overall transfer factor and Q is the discharge. In addition, the non-dimensuional quantity 'E s' involiving efficiency could be expressed as a function of F 1. the graphs allow the extension of results to a wide range of sizes.
Dr. Mini K. M., .G.Kaimal, M., and N Pillai, N., “Study of Plunging Hollow-jet Aerators using Non-dimensional Parameters”, Institution of Engineers (India)- EN, vol. 91, no. 1, pp. 20-26, 2010.