管束结构的阻尼控制型流弹失稳特性研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (1) : 83-90.

论文

管束结构的阻尼控制型流弹失稳特性研究

冯志鹏，臧峰刚，刘帅，黄旋，齐欢欢

作者信息 +

Damping-controlled type FEI characteristics of tube bundle structure

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

Author information +

文章历史 +

摘要

尽管自2012年SONGS事故以来，流弹失稳对管束结构的危害性和重要性再次引起了重点关注，但对导致这种不稳定现象的根本因素仍未确定。为进一步研究流弹失稳的基本物理机制，本文以压水堆蒸汽发生器通常采用的平行三角形管束为对象，基于开源CFD工具OpenFOAM，同时耦合管的动力学方程，求解具有移动边界的非定常Navier-Stokes(uRANS)方程，建立了研究阻尼控制型不稳定机制的数值模型，进而预测管束的流固耦合振动，揭示影响阻尼控制型不稳定机制的关键参数和流动响应。重点讨论了不同质量阻尼参数下，系统的响应特性、能量输入与耗散，升力与位移间的相干性、相位差、相关系数，升力的频谱特性，主导激励机理。进一步揭示了管束流弹系统中占主导地位的激励机理和关键流动现象，有助于理解管束与流体之间的相互作用机理，同时为工程中使用开源CFD工具OpenFOAM预测流弹失稳行为提供了参考。

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.

导出引用

冯志鹏，臧峰刚，刘帅，黄旋，齐欢欢. 管束结构的阻尼控制型流弹失稳特性研究[J]. 振动与冲击, 2024, 43(1): 83-90

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

参考文献

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