Response of a dual triangulate bluff body vortex flowmeter to oscillatory flow |
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| Affiliation: | 1. LadHyX–Département de Mécanique, CNRS – École Polytechnique, Route de Saclay, 91128 Palaiseau, France;2. ENSTA, Paristech, Unité de Mécanique (UME), Chemin de la Hunière, 91761 Palaiseau, France;1. School of Mechanical Engineering, Hangzhou Dianzi University, China;2. The State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, China;3. State Key Lab of Silicon Materials, Zhejiang University, China;4. School of Mechanical and Automotive Engineering, Zhejiang University of Science and Technology, China;1. Department of Chemical Engineering, Loughborough University, Loughborough, LE11 3TU, UK;2. Gubkin Russian State University of Oil and Gas, Moscow, Russia |
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| Abstract: | In this paper, on an experimental facility, the measurement characteristics of a diameter 50 mm dual triangulate bluff body vortex flowmeter in steady flow and oscillatory flow were investigated. Then, the Hilbert Huang Transformation (HHT) method was used to assess the anti-interference performances and the vortex street stability in oscillatory flow for the dual triangulate bluff body vortex flowmeter and a single bluff body vortex flowmeter. Offline simulation was carried out on the anti-interference performances of the dual triangulate bluff body vortex flowmeter signal noise in oscillatory flow by the method of the EMD-scales filter. The major findings are: (a) in most case, the EMD-scales filter may be as good at de-noising effect for the dual bluff body vortex flowmeter in oscillatory flow than that for the single bluff body vortex flowmeter in oscillatory flow. The vortex street stability in oscillatory flow for the dual bluff body is similar to that for the single bluff body. (b) In some special case, the EMD-scales filter is unable to play a better de-nosing role for the dual bluff body vortex flowmeter in oscillatory flow. The invalid condition of the EMD-scales filter for the dual bluff body vortex flowmeter in oscillatory flow is different to that of the single bluff body vortex flowmeter and it was advanced in this paper. (C) The vortex street stability for the dual bluff body vortex flowmeter is better than that for the single bluff body vortex flowmeter. |
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| Keywords: | Hilbert–Huang transform (HHT) EMD-scales filter Oscillatory flow Dual triangulate bluff body Vortex flowmeter |
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