Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2023 - September 06, 2023
When water with free surface in a reservoir is pressurized with air and jetted out from a nozzle attached to the bottom of the reservoir, the jets may periodically align outward in the radial direction and splash. Upstream of the periodic droplets splashing, water is sucked in as it swirls toward the nozzle. This suction vortex grows and enters the nozzle as a column of air. The process has been shown to be related to the shape of the suction vortex and its swirling velocity near the nozzle inlet and the occurrence of periodic droplets splashing. In this study, we investigated the relationship between nozzle inlet flow conditions and periodic droplets splashing in the case of sustained periodic droplet splashing. It was found that the swirling near the nozzle entrance affected the periodic droplets splashing.
