Water ACTS as the standoff to some extent; in the meanwhile, it will shorten the jets by eroding the jettip.
水介质在一定程度上起着炸高的作用，同时对射流头部又产生侵蚀效果。
2
In the experiment, the X-ray testing system takes pictures of the jet formatting and stretching. According to the pictures, we can calculate the jettip average velocity.
实验工作用X光拍摄射流形成过程和射流运动姿态，通过X光片测出射流头部平均速度；
3
The pressure characteristics at the tip of delivery tube is strongly related with the flow condition of the gas jet.