Turbocharger unstable operation diagnosis using vibroacoustic measurements

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dc.contributor.author Aretakis, N en
dc.contributor.author Mathioudakis, K en
dc.contributor.author Kefalakis, M en
dc.contributor.author Papailiou, K en
dc.date.accessioned 2014-03-01T01:21:40Z
dc.date.available 2014-03-01T01:21:40Z
dc.date.issued 2004 en
dc.identifier.issn 0742-4795 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/16303
dc.subject.classification Engineering, Mechanical en
dc.subject.other Acoustic wave velocity measurement en
dc.subject.other Acoustic waves en
dc.subject.other Automotive engineering en
dc.subject.other Compressors en
dc.subject.other Microphones en
dc.subject.other Vibration measurement en
dc.subject.other Acoustic measurements en
dc.subject.other Aerothermodynamics en
dc.subject.other Compressor casing en
dc.subject.other Sound emission en
dc.subject.other Turbomachinery en
dc.subject.other turbocharged engine en
dc.title Turbocharger unstable operation diagnosis using vibroacoustic measurements en
heal.type journalArticle en
heal.identifier.primary 10.1115/1.1771686 en
heal.identifier.secondary http://dx.doi.org/10.1115/1.1771686 en
heal.language English en
heal.publicationDate 2004 en
heal.abstract The possibility to detect unstable operating condition (stall or surge) of an automotive turbocharger using vibration or acoustic measurements is studied. An experimental study is performed, in order to acquire and analyze test data, to find out whether vibration or acoustic measurements can be correlated to aerothermodynamic operating condition. An instrumentation set allowing the definition of the operating point on the map of the compressor of the turbocharger is used. Hot wires at the compressor inlet serve as flow condition indicators and provide a clear indicator of the presence or not of instabilities, such as rotating stall or surge. Accelerometers are mounted on the casing and microphones are placed in the vicinity of the compressor casing, to measure vibration and sound emission. Data covering an extensive range of the compressor performance map have been collected and analyzed. Signal features from the different measuring instruments are discussed. Using such features, a bi-parametric criterion is established for determination of whether the compressor operates in the stable part of its performance characteristic or in the presence of unstable operation phenomena (rotating stall, surge). The possibility of generalizing the validity of observations is supported, by presenting results from testing a second turbocharger, which is shown to exhibit similar behavior. en
heal.journalName Journal of Engineering for Gas Turbines and Power en
dc.identifier.doi 10.1115/1.1771686 en
dc.identifier.isi ISI:000226006200020 en
dc.identifier.volume 126 en
dc.identifier.issue 4 en
dc.identifier.spage 840 en
dc.identifier.epage 847 en

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