Enhancing the signal-to-noise ratio of pressure sensitive paint data by singular value decomposition
2013 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 24, no 7, 075301- p.Article in journal (Refereed) Published
When using pressure sensitive paint under unsteady conditions in low-speed applications, the signal-to-noise ratio is usually low and may hinder the proper evaluation of the acquired data. Here, we propose a new noise-filtering scheme that is based on singular value decomposition. As a test case, we evaluate the fluctuating pressure field due to unsteady vortex shedding on the side of a square cylinder. The proposed scheme resulted in a reduction of pixel noise of the order of two magnitudes which made it possible to obtain results regarding the spatial form of flow structures as well as the shedding frequency.
Place, publisher, year, edition, pages
Institute of Physics (IOP), 2013. Vol. 24, no 7, 075301- p.
pressure sensitive paint, singular value decomposition, proper orthogonal decomposition, square cylinder, vortex shedding, noise filtering
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-124966DOI: 10.1088/0957-0233/24/7/075301ISI: 000320449100045ScopusID: 2-s2.0-84879974682OAI: oai:DiVA.org:kth-124966DiVA: diva2:638921
FunderSwedish Energy Agency
QC 201308052013-08-052013-08-022014-09-01Bibliographically approved