This paper presents an analytical model for the self-excited sloshing due to the fluid discharge over a flexible weir, as observed in the cooling circuit of the French fast breeder reactor, Super-Phenix-1. To clarify the instability mechanism, we analyzed the case in which an annular reservoir was divided into an upstream and a downstream plenum by a flexible cylindrical weir. The kinematic and dynamic effects of the discharged fluid on downstream plenum sloshing are discussed in details. Calculations are presented for the cylindrical fluid-structure model with successively increasing fluid level difference between the upstream and downstream plenums, and the instability mechanism is examined. [S0094-9930(00)00901-X]

Issue Section:
Technical Papers
Keywords:
mechanical stability, flexible structures, vibrations, fission reactor coolants, confined flow, flow instability
Topics:
Fluids, Sloshing
1.
Aita, S., Gibert, R. J., Verriere, P., Bertaut, C., Lacroix, C., and D’onghia, E., 1986, “Vibratory instability in SUPER-PHENIX LMFBR: discovery and solution,” presented at 4th European Nuclear Conf., Geneva, Switzerland.
2.
Aita, S., Tigeot, Y., Bertaut, C., and Serpantie, J. P., 1986, “Fluid-Elastic Instability of a Flexible Weir: Experimental Observations,” Proc. Flow-Induced Vibrations, ASME PVP 104, pp. 41–50.
3.
Fujita, K., Ito, T., Kodama, T., Adachi, S., Sekine, K., Ozaki, H., Eguchi, Y., and Yamamoto, K., 1993, “Study on Flow-Induced Vibration of a Flexible Weir Due to Fluid Discharge: Effect of Weir Stiffness,” Proc. Flow-Induced Vibration and Fluid-Structure Interaction, ASME PVP 258, pp. 143–150.
4.
Aita, S., and Gibert, R. J., 1986, “Fluid-elastic instability in a flexible weir: a theoretical model,” Proc. Flow-Induced Vibrations, ASME PVP 104, pp. 51–58.
5.
Kaneko, S., Nagakura, H., and Nakano, R., 1993, “Analytical Model for Self-Excited Vibration of an Overflow Flexible Plate Weir,” Proc. Flow-Induced Vibration and Fluid-Structure Interaction, ASME PVP 258, pp. 151–162.
6.
Nagakura, H., and Kaneko, S., 1995, “A Study on Self-Excited Sloshing due to the Fluid Discharge Over a Flexible Weir,” Proc. Fluid-Structure Interaction and Structural Mechanics, ASME PVP 310, pp. 15–25.
7.
Nagakura, H., 1996, Ph.D. thesis (in Japanese), University of Tokyo, Tokyo, Japan.
8.
Hirota, K., Kanzaki, Y., Adachi, S., Tanaka, N., Yamamoto, K., and Eguchi, Y., 1994, “Self-Excited Vibration of a Thin Cylindrical Weir due to Fluid Discharge” (in Japanese), Proc. JSME D&D Conf., 940-26, pp. 561–564.
Copyright © 2000
 by ASME
You do not currently have access to this content.