Acoustic Spectra of Ultrasound Induced Cavitations in Insulating Oils
M. Szmechta, D. Zmarzły, T. Boczar and M. Lorenc
Faculty of Electrical Engineering, Automatic Control and Computer Science, Institute of Electric Power Engineering, Opole University of Technology, Proszkowska 76, 45-758 Opole, Poland
Full Text PDF
Acoustic emission measurement results of acoustically induced cavitation bubbles in insulating oil are presented in this paper. Spectral analysis of acquired by a broadband transducer acoustic emission signals is proposed as a diagnostic tool for estimation of aging properties of mineral insulating oils. The article describes the main parts of the designed and built measurement apparatus used for acoustic cavitation investigation in insulating oils. In this note representative results of the experimental data taken from the apparatus are shown.
DOI: 10.12693/APhysPolA.114.A-231
PACS numbers: 43.35.Ei, 43.40.Le