Method and apparatus for acoustic suppression of cavitation

Details Method and apparatus for acoustic suppression of cavitation Method and apparatus for acoustic suppression of cavitation

2005-01-25

2005-01-25

Kornakov, M. (Department: 1746)

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

C367S131000, C137S013000, C137S014000, C137S828000

Reexamination Certificate

active

06846365

ABSTRACT:
The invention provides a method and apparatus for suppressing hydrodynamic cavitation through the use of high frequency (>500 kHz) and high amplitude (>1 atmospheres) acoustic energy. The method includes biasing a transducer driving signal to generate an acoustic field having a positive pressure halves. The resulting acoustic field is imposed on a region where cavitation is to be preempted. A cavitation preempting acoustic field in the liquid is similar in effect as using a hyperbaric confinement for imposing hydrostatic pressure, a known method for suppressing cavitation. In this regime, suppression of cavitation will be due to imposing a dominant high amplitude, high-frequency pressure field to ensure that the gaps between the compressive pulses are shorter than 10−7to 10−6seconds, which is less than that typically necessary to cause cavitation.

REFERENCES:
patent: 5594165 (1997-01-01), Madanshetty
patent: 5681396 (1997-10-01), Madanshetty
patent: 5694936 (1997-12-01), Fujimoto et al.
patent: 5717657 (1998-02-01), Ruffa
patent: 5884650 (1999-03-01), Ruffa
patent: 6395096 (2002-05-01), Madanshetty
patent: 2000287988 (2000-10-01), None

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