Abstract

Abstract An electrical impedance probe is described which will be used to study the properties of attached cavitation. The method uses a series of electrodes mounted flush to the surface of a cavitating hydrofoil, and detects the presence of liquid or vapor through changes in the impedance of the local fluid medium. Characteristics of steady and unsteady attached cavitation, including cloud shedding and re-entrant jets, are reviewed. The impedance technique is shown to have the potential to measure advection velocities of bubble clouds, velocities of re-entrant jets, and frequencies associated with unsteady cavitation.

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