Experimental investigation of effervescent atomization: Part I. Comparison of flat-end and streamlined aerator body designs

This study of effervescent atomization, a two-phase gas-liquid spray generation technique that offers many advantages over conventional atomizers, shows the advantage streamlined aerator design flat-end type with respect to formation gas-void in wake interior an inside-out atomizer. The experiments use high-speed shadowgraphy visualizations. It is observed that, design, undesirable and leads characterized by instabilities, causing fluctuating properties. existence also prevents bubbly flow inside atomizer, which actually preferred these types atomizers enable stable fine atomization. result bluff body recirculation gas phase buoyancy effects. Four different designs tips shape circular arc, arc/conical hybrid, conical, DARPA SUBOFF afterbody (which common ship designs) are evaluated determine best among them mitigating unwanted These their ability produce comparatively large operating range impart minimum (of body) effect. concluded, upon careful experimental observations, designs.