 |
École polytechnique Open archive |  |
 |
Conference papers
Effect of length on the instability of hanging pipes
Abstract : The flutter instability of a hanging fluid-conveying pipe is investigated, as its length is increased. Experiments show that there exists a critical length above which the flow velocity necessary to cause flutter becomes independent of the pipe length. The fluid-structure interaction is thus modelled by following the work of Bourrières and of Païdoussis. Computations using a standard Galerkin method confirm this evolution. A short pipe model is then considered, where gravity plays a negligible role. Transition between this short length model and the asymptotic situation is found to occur where a local stability criterion is satisfied at the upstream end of the pipe. For longer pipes, a model is proposed where the zone of stable waves is totally disregarded. Comparison of these models with experiments and computations show a good agreement over all ranges of mass ratios between the flowing fluid and the pipe.
https://hal-polytechnique.archives-ouvertes.fr/hal-01026052
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Sunday, July 20, 2014 - 7:16:03 PM
Last modification on : Thursday, March 5, 2020 - 6:29:35 PM
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Sunday, July 20, 2014 - 7:16:03 PM
Last modification on : Thursday, March 5, 2020 - 6:29:35 PM