Abstract
An experimental apparatus has been assembled for the study of sonically induced cavitation in liquids in the frequency range of 20 to 40 kilocycles. Radially symmetric standing waves are produced in a spherical resonator driven externally by a magnetostriction transducer. The resonator is a round bottom Pyrex boiling flask suspended by piano wires to provide an extremely low-loss system, permitting acoustic pressures of the order of tens of atmospheres to be established at the center of the sphere. The acoustic pressure within the sphere is measured by a small, probe mounted, barium-titanate transducer positioned at secondary maxima of the standing pressure wave. Equipment is provided for measuring the gas content of the liquid being studied. A description will be given of procedures for measuring cavitation thresholds with hydrostatic pressure, gas content, surface tension, viscosity, and temperature as parameters. Preliminary results will be presented.
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