Advanced mathematical tools are applied for the data processing of the unsteady pressure field around a rectangular 5:1 (width-to-depth ratio) cylinder. Basing on experimental results of smooth flow aerodynamic tests, Proper Orthogonal Decomposition (POD), Morlet-Wavelet Transform (Morlet-CWT) and Hilbert-Huang Transform (HHT) and are used to investigate some features of the vortex shedding phenomenon. Considering three different angles of attack, dominant modes and time-frequency information have been extracted, making comparisons between methods capabilities and identification performance.
Time-frequency and POD analysis of the experimental pressure field around a 5:1 rectangular cylinder / Luca Pigolotti; Claudio Mannini; Antonino Maria Marra; Gianni Bartoli. - ELETTRONICO. - (2014), pp. 1-8. (Intervento presentato al convegno VI International Symposium on Computational Wind Engineering tenutosi a Amburgo, Germania nel 8-12 giugno 2014).
Time-frequency and POD analysis of the experimental pressure field around a 5:1 rectangular cylinder
PIGOLOTTI, LUCA;MANNINI, CLAUDIO;MARRA, ANTONINO MARIA;BARTOLI, GIANNI
2014
Abstract
Advanced mathematical tools are applied for the data processing of the unsteady pressure field around a rectangular 5:1 (width-to-depth ratio) cylinder. Basing on experimental results of smooth flow aerodynamic tests, Proper Orthogonal Decomposition (POD), Morlet-Wavelet Transform (Morlet-CWT) and Hilbert-Huang Transform (HHT) and are used to investigate some features of the vortex shedding phenomenon. Considering three different angles of attack, dominant modes and time-frequency information have been extracted, making comparisons between methods capabilities and identification performance.
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