Acoustic emission measurements of ultrasound induced cavitation bubbles in aged insulating oils

Author

Szmechta, Marek ; Boczar, Tomasz ; Zmarzly, Dariusz ; Aksamit, Pawel

Author_Institution

Dept. of Electr. Eng., Opole Univ. of Technol., Opole, Poland

fYear

2010

Firstpage

1

Lastpage

4

Abstract

The paper presents the behavior of ultrasound induced cavitation voids and bubbles in mineral insulating oils with different aging properties. At suitable values of signal amplitude and frequency many of cavitation bubbles were observed. Collapsing bubbles were responsible for broadband noise included in acoustic emission signal spectra. To represent the cavitation intensity a cavitation indicator based on power spectral densities of acoustic emission signal was proposed.

Keywords

acoustic emission; bubbles; cavitation; insulating oils; acoustic emission measurements; acoustic emission signal spectra; aged insulating oils; broadband noise; collapsing bubbles; mineral insulating oils; power spectral densities; ultrasound induced cavitation bubbles; Acoustic emission; Acoustic measurements; Aging; Frequency; Minerals; Oil insulation; Petroleum; Power transformer insulation; Ultrasonic imaging; Ultrasonic variables measurement; acoustic cavitation; acoustic emission; insulating oil; power spectral density;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation (ISEI), Conference Record of the 2010 IEEE International Symposium on

Conference_Location

San Diego, CA

ISSN

1089-084X

Print_ISBN

978-1-4244-6298-8

Type

conf

DOI

10.1109/ELINSL.2010.5549780

Filename

5549780