Damping-controlled type FEI characteristics of tube bundle structure

FENG Zhipeng, ZANG Fenggang, LIU Shuai, HUANG Xuan, QI Huanhuan

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (1) : 83-90.

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PDF(2906 KB)
Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (1) : 83-90.

Damping-controlled type FEI characteristics of tube bundle structure

  • FENG Zhipeng, ZANG Fenggang, LIU Shuai, HUANG Xuan, QI Huanhuan
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Abstract

Although the harmfulness and importance of fluidelastic instability of the tube bundle have attracted Particular emphasis again since the SONGS accident in 2012, the fundamental factors leading to this instability have not been determined. In order to further study the basic physical mechanism of fluidelastic instability, taking the parallel triangular tube bundle commonly used in PWR steam generator as the object, based on the open source CFD tool OpenFOAM and coupling the dynamic equation of the tube, this paper solves the unsteady Navier-Stokes (uRANS) equation with moving boundary, establishes a numerical model to study the damping-control instability mechanism, and then predicts the fluid-structure interaction of the tube bundle. The key parameters and flow response affecting the damping-controlled instability mechanism are revealed. The response characteristics, energy input and dissipation, coherence, phase difference and correlation coefficient between lift and displacement, spectral characteristics of lift and dominant excitation mechanism are discussed under different mass damping parameters. It further reveals the dominant excitation mechanism and key flow phenomena in the fluidelastic instability of tube bundle, which is helpful to understand the interaction mechanism between the tube bundle and the fluid, and provides a reference for using the open source CFD tool OpenFOAM to predict the instability behavior of the fluidelastic instability in engineering.

Key words

Flow-induced vibration / Fluidelastic instability / Tube bundle / Damping-controlled mechanism / OpenFOAM

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FENG Zhipeng, ZANG Fenggang, LIU Shuai, HUANG Xuan, QI Huanhuan. Damping-controlled type FEI characteristics of tube bundle structure[J]. Journal of Vibration and Shock, 2024, 43(1): 83-90

References

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