Time-resolved measurements with a vortex flowmeter in a pulsating turbulent flow using wavelet analysis
2010 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 21, no 12, 123001- p.Article in journal (Refereed) Published
Vortex flowmeters are commonly employed in technical applications and are obtainable in a variety of commercially available types. However their robustness and accuracy can easily be impaired by environmental conditions, such as inflow disturbances and/or pulsating conditions. Various post-processing techniques of the vortex signal have been used, but all of these methods are so far targeted on obtaining an improved estimate of the time-averaged bulk velocity. Here, on the other hand, we propose, based on wavelet analysis, a straightforward way to utilize the signal from a vortex shedder to extract the time-resolved and thereby the phase-averaged velocity under pulsatile flow conditions. The method was verified with hot-wire and laser Doppler velocimetry measurements.
Place, publisher, year, edition, pages
2010. Vol. 21, no 12, 123001- p.
vortex flowmeter, wavelet analysis, Kármán vortex street, pulsatile flow
IdentifiersURN: urn:nbn:se:kth:diva-26336DOI: 10.1088/0957-0233/21/12/123001ISI: 000284261900002ScopusID: 2-s2.0-78649894956OAI: oai:DiVA.org:kth-26336DiVA: diva2:371865
QC 2010120082010-11-232010-11-232012-05-10Bibliographically approved