水撃現象を活用した多段パルスウォータジェット発生システム Multiple Water Jetting System by Means of Water Hammer

We developed a multiple pulsed water jetting system by means of water hammer in a convergent pipeline caused by strong spool acceleration. In the present study, the computer simulation of pump-line-nozzle system demonstrated that an operation and the injection pressure are satisfactory as a multiple water jetting system. The triple jetting was obtained by single operation signal for the electromagnetic pilot valve system at an optimum orifice diameter in oil paths in present system. In experiments, the piercing time of work by water jet was reduced by triple jetting at the same stand-off distance between nozzle outlet and work.