Experimental Study and Mechanism Analysis of Effervescent Atomization

The flowand spraycharacteristic of effervescent atomization nozzle has been studied experimentallyandthe inner flow fieldwasanalyzedwithnumerical method. Experiments show that the injection pressure and air/liquid ratio (ALR) are the major factors impacting the atomization stability, and the flow coefficientof the nozzleranged in 0.1-0.15. The VOF simulation of the inner flow field of the nozzle reveals the generaltransformationprocess of the bubble, and the region near the exit orifice plays the dominant roleduringtheatomizationprocesswhere miniature bubbles are generated, expanded in size and accelerated and interacting with the local flow field.