Manipulation of liquids using phased array generation of acousti

Details Manipulation of liquids using phased array generation of acousti Manipulation of liquids using phased array generation of acousti

1997-09-17

2000-02-29

Williams, Hezron

Measuring and testing

Vibration

Acoustic levitation

210748, 55277, B01D 1706

Patent

active

06029518&

ABSTRACT:
A phased array of piezoelectric transducers is used to control and manipulate contained as well as uncontained fluids in space and earth applications. The transducers in the phased array are individually activated while being commonly controlled to produce acoustic radiation pressure and acoustic streaming. The phased array is activated to produce a single pulse, a pulse burst or a continuous pulse to agitate, segregate or manipulate liquids and gases. The phased array generated acoustic radiation pressure is also useful in manipulating a drop, a bubble or other object immersed in a liquid. The transducers can be arranged in any number of layouts including linear single or multi-dimensional, space curved and annular arrays. The individual transducers in the array are activated by a controller, preferably driven by a computer.

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NASA LeRC Technology Opportunity Paper . . . Combustion & Fluids CF-070-1 . . . "Technology Opportunity " Liquid Manipulation by Acoustic Radiation Pressure by Richard Oeftering, Sep. 19, 1996.

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