In various manufacturing processes, multiple jet devices are used to collect liquid in a chamber and eject it from multiple nozzles. Previous research has shown that the velocity distribution of each jet becomes non-uniform when vortices are generated in the chamber due to deterioration of inflow conditions. In addition, in a previous study, the authors suppressed the generation of vortices in the chamber and made each nozzle flow velocity uniform by installing a baffle plate in the chamber. However, the detailed mechanism by which the baffle plate suppresses the generation of vortices in the chamber has not yet been clarified sufficiently. In this study, to clarify the mechanism for suppressing vortex generation in the chamber, we performed a transient analysis of the flow in the chamber at different inflow flow velocities using Ansys CFX. As a result, it was found that when the velocity ratio was 1:2, the flow in the chamber diffused and impinged, the fluid velocity decreased, and the high vorticity circulation flow was suppressed.
Kondo et al. (Wed,) studied this question.