Abstract
Cavitation bubbles are generated when the high-speed water jet is spouted into static fluid. The bubble collapse causes highly impact force. Therefore, the cavitating jet is applied to remove the dirty on the material and improve the fatigue strength of metallic materials, and so on. However, the cavitation exists only in the region near the center of the jet. In this study, the cavitating jet in the static fluid with bubbles is observed by taking photographs from the side and the front of the jet, and the erosion by the cavitating jet is examined. The results show that the capability for process is high on the center of the jet and around the jet for no bubbles, but the region of the high capability for process is wide and averaged when the bubbles are mixed in the static fluid.
