Abstract
The cavitation jet technique has progressively developed in several industrial fields, such as cleanings and peenings in water, since the destructive capabilities of the jets are directly related to the unsteady behavior of the cavitating jet. As such behavior deeply depends on the interferences between the discharge of the cavity and the explosive growth of the bubble-cloud, it is therefore necessary to study such interferences. We study the time-dependent feature of the bubble-clouds on the cavity boundary as well as the discharge in cavitating jets within x/d=0-90 of the standoff distance, by means of a high-speed camera, a high-speed video-camera and image processing system. It is found that the periodical discharge of the cavity does not take place simultaneously with the periodical growth of the bubble cloud.
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