A Study to Avoid the Dangers of High Speed Liquid Jets : Perpendicular Jets from 5 mm-long Small Circular Holes

An experimental research has been carried on to study the danger of a high-speed jet discharged from a hole in hydraulic equipment of very high pressure to the people working around the equipment. In this paper, the results of the research both on the time taken for a tested jet to inflict a piercing wound on the raw skin of an ox, when it was discharged from a hole of 5mm in length and hit the skin perpendicularly, and on the process of growth of a damage to a resin board of 1cm in thickness caused by the jet, such as when the hole have a relatively small diameter and the pressure is relatively low the place where the tested jet pierces through the skin most quickly is distant a little form the hole, are reported.