Turbocharger unstable operation diagnosis using vibroacoustic measurements

Aretakis, N; Kefalakis, M; Mathloudakis, K; Papailiou, K

dc.contributor.author	Aretakis, N	en
dc.contributor.author	Kefalakis, M	en
dc.contributor.author	Mathloudakis, K	en
dc.contributor.author	Papailiou, K	en
dc.date.accessioned	2014-03-01T02:49:36Z
dc.date.available	2014-03-01T02:49:36Z
dc.date.issued	2003	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34636
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0346317336&partnerID=40&md5=3d88647ae0d335a3c0bbfdd99f0a70cc	en
dc.subject.other	Accelerometers	en
dc.subject.other	Acoustic variables measurement	en
dc.subject.other	Automobile engines	en
dc.subject.other	Compressors	en
dc.subject.other	Enthalpy	en
dc.subject.other	Flow of fluids	en
dc.subject.other	Indicators (instruments)	en
dc.subject.other	Microphones	en
dc.subject.other	Spurious signal noise	en
dc.subject.other	Vibrations (mechanical)	en
dc.subject.other	Mass flow rate	en
dc.subject.other	Turbochargers	en
dc.subject.other	Turbomachinery	en
dc.title	Turbocharger unstable operation diagnosis using vibroacoustic measurements	en
heal.type	conferenceItem	en
heal.publicationDate	2003	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 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	American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI	en
dc.identifier.volume	1	en
dc.identifier.spage	361	en
dc.identifier.epage	369	en