The Effect of Cavitation Inside the Nozzle on Unsteady Sprays (First Report)

- The Effect of Nozzle Magnification Ratio -

Abstract

The atomization structure of the fuel spray is known to be affected by flow conditions and cavitation inside the nozzle. The objective of work reported in this study is to clarify the effect of cavitation phenomena on the spray atomization. In this paper, in order to clarify the effect of magnification ratio on cavitation inside the nozzle hole and the behavior of liquid jet, the impulsive acceleration measurement and observation of flow pattern including cavitation were carried out by using enlarged acrylic nozzles. Cavitation is classified into the three patterns, and the relationship between the magnification ratio and the impulsive acceleration is clarified from this experiment.