Abstract
To make effective use of cavitation, the larger impact force is desirable. In cloud cavitaion, the shock pressure is several times than that of single bubble burst. The intensity of jet catitation by using the multi-hole orifice is enhanced as the result of interaction and coalescence of vortex cavitation. When the distance between the holes is the smaller than the diameter of the holes, vortex cavitation approaches each other and grow up the massive bubbles. The acceleration of the cavitation vibration increases in intensity. In the case of the large distance between the holes, it does not coalesce and the acceleration value stays low values.
