A STUDY OF IMPULSIVE PRESSURE DISTRIBUTION OF CAVITATION GENERATED BY A HIGH-FREQUENCY VIBRATIONAL PROBE

Abstract

The cavitation is always known as a very harmful phenomenon to the hydraulic systems and equipment. But the collapse of cavitation micro-bubbles can be used as a knifeless cutter due to the highly erosive pressure. In order to make usage of this phenomenon, the present study investigated experimentally the characteristics of the 47 kHz-ultrasonic cavitation by several techniques, such as, particle flow visualization; impulsive pressure and acoustic emission (AE) measurement. As the result, the cavitation phenomenon induced by the 47 kHz vibrator has been visualized and the impulsive pressure performance is established. The collapsed frequency and erosive intensity of cavitation bubbles which induced by the 47 kHz vibrational field is analyzed. The effects of parameters, such as, vibrational intensity; stand-off distance are estimated with the aim of cavitation control for realizing a micro knifeless-surgical tool.