High-order simulation of the flow instability over a non-circular structure
International audience Bluff bodies can be prone to well-known self-excited instability such as galloping. Opposite to classical and well documented Vortex Induced Vibrations (VIV), oscillation amplitude is not bounded in such a way galloping-like instability can alter the integrity of the structure...
Published in: | Volume 7: CFD and VIV |
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Main Authors: | , , |
Other Authors: | , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2013
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01309838 https://hal.archives-ouvertes.fr/hal-01309838/document https://hal.archives-ouvertes.fr/hal-01309838/file/Minguez2013.pdf https://doi.org/10.1115/OMAE2013-10200 |
Summary: | International audience Bluff bodies can be prone to well-known self-excited instability such as galloping. Opposite to classical and well documented Vortex Induced Vibrations (VIV), oscillation amplitude is not bounded in such a way galloping-like instability can alter the integrity of the structure on short term. Although stability criteria exist in the literature [1], there is a real lack considering the cause and the way to inhibit such instability. It is consequently proposed in this paper to investigate the flow over the classical ‘non-circular’ structure, i.e. the square box body, by means of advanced Spectral Large Eddy Simulation (LES) solver, [16], [17] & [18]. The main objectives of this numerical analysis will be to provide an accurate solution to underline the possible mechanisms that trigger the instability as well as a base solution for future wake stability & control analysis, [6]. |
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