High power ultrasonic waves in water

Date
1948
DOI
Authors
Hall, Eldon Conrad
Version
OA Version
Citation
Abstract
The phenomena of cavitation limits the power transmitted in water, but it is known that if the sound is transmitted in pulses, the power required to produce cavitation increases with decreasing pulse length. In many liquids including water, the increase in power to produce cavitation has been investigated for pulse lengths of 10 milliseconds and longer. In this report an attempted investigation of the cavitation point for pulse lengths near one microsecond was made. Some nonlinear characteristics that were previously reported as cavitation were found. These characteristics are not in complete agreement with those accompanying cavitation as reported in other sources, but they seem to arise from increased absorption caused by the dissassociation of the complex molecules of water by the sound waves. Most of the equipment used was designed by the Radiation Laboratory at M.I.T. and was modified for this experiment. Point to point measurements were made in preference to the reflection method as usually used with pulse measurements.
Description
Thesis (M.A.)--Boston University This item was digitized by the Internet Archive.
License
Based on investigation of the BU Libraries' staff, this work is free of known copyright restrictions