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EXPERIMENTAL UNCERTAINTY ANALYSIS OF IMPEDANCE MEASUREMENTS
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2016 (English)In: PROCEEDINGS OF THE 23RD INTERNATIONAL CONGRESS ON SOUND AND VIBRATION: FROM ANCIENT TO MODERN ACOUSTICS, INT INST ACOUSTICS & VIBRATION , 2016Conference paper (Refereed)
Abstract [en]

The study of the interaction between acoustics and flow has a long history, and has attracted many scholars. Consequently the major contributors to acoustic-flow interaction are known and improvements made on models to describe the various interactions, give a relative small impact to the overall effect. To validate these new models, experiments have to be more precise and accurate, otherwise no valid statement can be made if the measurements are agreeing with the improved models. The flow-acoustic interaction is commonly measured using impedance tubes through which a flow flows. In this paper, a linear uncertainty analysis is presented to determine the precision of the obtained impedance results. Such kind of analysis has been already reported in literature, but in this paper, the analysis has been expanded to include more uncertain variables and the method is investigated to show the limitations of such an analysis. As an application of the analysis, the measurement of a known impedance without flow has been analyzed, revealing the presence of bias errors in the measurement setup.

Place, publisher, year, edition, pages
INT INST ACOUSTICS & VIBRATION , 2016.
Series
Proceedings of the International Congress on Sound and Vibration, ISSN 2329-3675
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-203204ISI: 000388480403054ISBN: 978-960-99226-2-3 OAI: oai:DiVA.org:kth-203204DiVA: diva2:1081418
Conference
23rd International Congress on Sound and Vibration (ICSV), JUL 10-14, 2016, Athens, GREECE
Note

QC 20170314

Available from: 2017-03-14 Created: 2017-03-14 Last updated: 2017-03-14Bibliographically approved

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