NDLI: CFD Modeling of Flow Induced Vibration on a Mobile Cylinder for a 30 K-60 K Reynolds Number Comparison Between Simulation and Experimental Results

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Peyrard, Christophe Belloli, Marco Bousseau, Pierre Muggiasca, Sara Giappino, Stefano Howard, Richard Rocchi, Daniele
Copyright Year	2009
Abstract	Fatigue and aging of electrical overhead transmission lines is a major concern nowadays in developed countries with ever increasing difficulties to build new lines and an already quite aged network. An important degradation phenomenon of overhead line cables is fretting fatigue close to the suspension clamps due to vortex induced vibrations (VIV). These VIV are generally observed for wind speeds in the range of 1 to 7 m/s. The existing industrial practice for predicting how prone cables are to VIV fatigue is based on a balance between the power generated by the wind and the power dissipated by the cable system. The power generated by the wind has been evaluated through measurements on real line spans and through wind tunnel experiments on rigid and flexible cylinders as a function of frequency and vibration amplitude. The wind tunnel measurement results are mainly performed for constant flow speed. Corresponding results show a scattering from simple to double. Furthermore, complementary investigations are required to better evaluate the power with wind speed variations across and along the overhead line span. EDF R&D (with Code_Saturne open source software) and Politecnico di Milano have evaluated CFD modeling on a mobile rigid cylinder with comparison to detailed wind tunnel measurement results performed by Politecnico di Milano on a 20 cm diameter rigid cylinder equipped with a pressure scanner. This paper presents the steps, the different questions raised, the difficulties and limitations for the setting and the realization of the CFD modeling approach. The comparison between experimental results and simulation results is presented for the mobile rigid cylinder with k-ω SST turbulence model.
Sponsorship	Pressure Vessels and Piping
Starting Page	301
Ending Page	308
Page Count	8
File Format	PDF
ISBN	9780791843673
DOI	10.1115/PVP2009-77534
e-ISBN	9780791838549
Volume Number	Volume 4: Fluid-Structure Interaction
Conference Proceedings	ASME 2009 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2009-07-26
Publisher Place	Prague, Czech Republic
Access Restriction	Subscribed
Subject Keyword	Wind Radiation scattering Turbulence Vibration Computational fluid dynamics Wind tunnels Arches Scattering (physics) Computer software Reynolds number Wind velocity Fatigue Modeling Flow (dynamics) Pressure Vortex-induced vibration Cables Transmission lines Simulation results Simulation Flow-induced vibrations Electromagnetic scattering Cylinders
Content Type	Text
Resource Type	Article

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