Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2017 - September 06, 2017
In this paper we develop a method for controlling cavitation caused by acceleration. A test tube filled with a liquid is accelerated by an impact and a liquid jet emerges from the curved meniscus. Without cavitation, the jet velocity depends on velocity of the test tube. In contrast, if cavitation occurs, the jet velocity becomes faster than the case without cavitation. Thus, the control of cavitation is indispensable to the control of the jet velocity. In the previous study, however, the cavitation has not been controlled. In this presentation, we use PVA gel including tiny bubbles in order to control cavitation effect on the jet velocity. We measure the jet velocity and bubble volume by high speed imaging. We find that the cavitation volume depends on PVA gel volumes. Moreover, the relation between jet velocity relies on the volume of PVA gel in the liquid. The introduction of PVA gel may be the effective method of controlling the jet velocity.
