Turbocharger unstable operation diagnosis using vibroacoustic measurements

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

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.publisher	ASME-AMER SOC MECHANICAL ENG	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