Abstract
Though many experimental data have indicated that cavitation in a nozzle of pressure atomizer might affect liquid jet atomization, our knowledge on the effects of cavitation and Reynolds numbers, σ and Re, on cavitating flow and discharged jet is still rudimentary. Flow visualization under various values of σ and Re was, therefore, carried out by making use of a transparent two-dimensional nozzle. Tap water at atmospheric pressure was used in the experiments. Water temperature and flow rate were varied to adjust σ and Re to desired values. As a result, we confirmed that (1) cavitating flow and jet are not affected by the Reynolds number, but by the cavitation number, and (2) cavitation plays an important role in the liquid jet behavior just downstream of the nozzle exit.
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