The spray of an annular preﬁlmling airblast nozzle was investigated at ambient conditions with the shadowgraphy technique. The measured volume probability densities of the droplets and Sauter mean diameters conﬁrm the trends of previous investigations performed at planar preﬁlmers, where the gas velocity was found to have much stronger effect on the atomization process compared to the ﬁlm ﬂow rate. Furthermore, the experimental results were compared to the Primary Atomization Model for prEﬁlming airBLast injectors (PAMELA) in terms of drop size distribution and Sauter Mean Diameter (SMD). It was observed that the PAMELA model is capable to predict the SMD of an annular preﬁlming airblast nozzle adequately, without further adjustment of the constants derived from previous experimental investigations at planar geometries.
Comparison of the Primary Atomization Model PAMELA with Drop Size Distributions of an Industrial Preﬁlming Airblast
ILASS - Europe 2016, 27th Annual Conference on Liquid Atomization and Spray Systems
04.09.2016 - 07.09.2016