2019 Volume 58 Issue 1 Pages 19-27
This paper proposes a novel method for controlling the jet velocity using a PVA gel for a new inkjet generator. Recently, we suggested the new inkjet generator using an impulsive force. The generator can eject highly-viscous jets (10,000mm2/s). However, cavitation bubbles occur in the liquid when a strong impulsive force is imposed. It is difficult to control the bubble volume which varies the jet velocity. To control the jet velocity, controlling of the bubble volume is required. In this study, we propose the control method using the PVA gel, which initially contains the bubbles. We conducted experiments with the various volume of PVA gel. We successfully control the bubble-assisted increment of the jet velocity. Furthermore, we discussed the mechanism of the jet acceleration by considering the propagation of the pressure wave in the liquid/gel.
