EXPERIMENTAL INVESTIGATION OF IN-FLOW FLUIDELASTIC INSTABILITY FOR SQUARE TUBE BUNDLES SUBJECTED TO SINGLE-PHASE AND TWO-PHASE TRANSVERSE FLOWS - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2018

EXPERIMENTAL INVESTIGATION OF IN-FLOW FLUIDELASTIC INSTABILITY FOR SQUARE TUBE BUNDLES SUBJECTED TO SINGLE-PHASE AND TWO-PHASE TRANSVERSE FLOWS

Résumé

The in-flow fluidelastic instability of tube bundles prompted renewed interest since the recent unanticipated failure of the replacement steam generators at the San Onofre nuclear power station. A literature review on the topic discloses contrasting views, depending on the tube bundle and flow configuration addressed. The present paper reports extensive experiments, performed at CEA-Saclay, on the in-flow fluidelastic features of square bundles. A 5x3 square bundle with P/D=1.5 and D=30mm was subjected to single-phase and two-phase air-water (with homogeneous void fractions 80%, 90% and 98%) transverse flows, for four different flexibility configurations. The flexible tubes were mounted using anisotropic supports, only allowing for in-flow vibrations. This is the first time that in-flow test results are obtained for square bundles subjected to two-phase flows. As main conclusion from the experiments in both single and two-phase flows, no instability was observed for all tested configurations. These results support those obtained by previous authors for similar tested configurations and highlight the contrasting in-flow fluidelastic behavior of triangular and square bundles.
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Dates et versions

hal-04502302 , version 1 (13-03-2024)

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  • HAL Id : hal-04502302 , version 1

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Xavier Delaune, Philippe Piteau, Laurent Borsoi, Jose Antunes. EXPERIMENTAL INVESTIGATION OF IN-FLOW FLUIDELASTIC INSTABILITY FOR SQUARE TUBE BUNDLES SUBJECTED TO SINGLE-PHASE AND TWO-PHASE TRANSVERSE FLOWS. 9th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, Flow-Induced Vibration & Noise, Jul 2018, Toronto, Canada. ⟨hal-04502302⟩
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