Blucher Mechanical Engineering Proceedings

Maio 2014, vol.1, num.1 - 10th World Congress on Computational Mechanics
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NUMERICAL STUDY OF TUBE-BUNDLE FLOW-INDUCED VIBRATIONS WITH MULTIPHASE-POD APPROACH

NUMERICAL STUDY OF TUBE-BUNDLE FLOW-INDUCED VIBRATIONS WITH MULTIPHASE-POD APPROACH

Pomarède, Marie; Liberge, Erwan; Hamdouni, Aziz; Longatte, Elisabeth; Sigrist, Jean-Franc¸ois

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Fluid-Structure Interactions are present in a large number of systems of nuclear power plants and nuclear on-board stoke-holds. Particularly in steam generators, where tube bundles are submitted to cross-flow which can lead to structure vibrations. We know that numerical studies of such a complex mechanism is very costly, that is why we propose the use of reduced-order methods in order to reduce calculation times and to make easier parametric studies for such problems. We use the multiphase-POD approach, which is an adaptation of the classical POD approach to the case of a moving structure in a flow, considering the whole system (fluid and structure) as a multiphase domain. We are interested in the case of large displacements of a structure moving in a fluid, in order to observe the ability of the multiphase- POD technique to give a satisfying solution reconstruction. We obtain very interesting results for the case of a single circular cylinder in cross-flow (lock-in phenomenon). Then we present the application of the method to a case of confined cylinders in large displacements too. Here again, results are encouraging. An on-going work consist in going further testing parametric studies with POD-Galerkin approach and with POD basis interpolation. A future work will consist in applications to fluid-structure interactions.

Fluid-Structure Interactions are present in a large number of systems of nuclear power plants and nuclear on-board stoke-holds. Particularly in steam generators, where tube bundles are submitted to cross-flow which can lead to structure vibrations. We know that numerical studies of such a complex mechanism is very costly, that is why we propose the use of reduced-order methods in order to reduce calculation times and to make easier parametric studies for such problems. We use the multiphase-POD approach, which is an adaptation of the classical POD approach to the case of a moving structure in a flow, considering the whole system (fluid and structure) as a multiphase domain. We are interested in the case of large displacements of a structure moving in a fluid, in order to observe the ability of the multiphase- POD technique to give a satisfying solution reconstruction. We obtain very interesting results for the case of a single circular cylinder in cross-flow (lock-in phenomenon). Then we present the application of the method to a case of confined cylinders in large displacements too. Here again, results are encouraging. An on-going work consist in going further testing parametric studies with POD-Galerkin approach and with POD basis interpolation. A future work will consist in applications to fluid-structure interactions.

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DOI: 10.5151/meceng-wccm2012-19967

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Como citar:

Pomarède, Marie; Liberge, Erwan; Hamdouni, Aziz; Longatte, Elisabeth; Sigrist, Jean-Franc¸ois; "NUMERICAL STUDY OF TUBE-BUNDLE FLOW-INDUCED VIBRATIONS WITH MULTIPHASE-POD APPROACH", p-4552-4563. In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 23580828, DOI 10.5151/meceng-wccm2012-19967

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