Engine oil condition monitoring using high temperature integrated ultrasonic transducers

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DOIResolve DOI: http://doi.org/10.1115/DETC2010-29232
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TypeArticle
Proceedings titleProceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference--2010
ConferenceASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE2010), 15–18 August 2010 , Montreal, Quebec, Canada
Volume3
Pages10331038; # of pages: 6
AbstractHigh temperature integrated ultrasonic transducers (IUTs) made of thick piezoelectric composite films have been coated directly onto the lubricant oil supply and sump lines of a modified CF700 turbojet engine. These thick piezoelectric films are fabricated using a sol-gel spray technology. The center frequencies of these IUTs are in the range of 10 to 12 MHz. The top electrodes, electrical wires, conducing adhesive bond, connectors and cables have been tested for temperatures up to 500°C. By operating these IUT in transmission mode, the amplitude and velocity of transmitted ultrasonic waves across the flow channel of the lubricant oil in supply and sump lines were mea sured during engine operation. The results have shown that the strength of the ultrasonic waves is sensitive to the presence of air bubbles in oil and the ultrasound velocity is linearly dependent on oil temperature. Based on the sensiti vity of ultrasound velocity to oil temperature, a method for real-time monitoring of engine oil degradation is proposed.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Industrial Materials Institute; NRC Institute for Aerospace Research
Peer reviewedYes
NRC number52472
NPARC number16898209
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Record identifier836434be-206b-4c4c-bcec-fc584c22a705
Record created2012-03-01
Record modified2016-05-09
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