Investigation of the spray characteristics of a twin fluid atomizer using LSI and PDA

The purpose of this paper is to fully characterize an industrial twin fluid swirl atomizer through the use of laser based measurement techniques. The atomizer used in this study was manufactured by Delavan and features three air swirl inlets onto the main fluid core located in a mixing chamber within the nozzle. The two phase flow then impacts a strategically positioned impingement plate which promotes further mixing. Finally, the two phase mixture exits the nozzle via an annular passage formed using a pintle. Figure 1 illustrates the concept of this industrial atomizer.