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.
[1] 姜乃斌, 冯志鹏, 臧峰刚, 等. 核工程中的流致振动理论及应用[M]. 上海: 上海交通大学出版社, 2018.
Jiang Naibin, Feng Zhipeng, ZangFenggang, et al.Theory and Application of Flow-inducedVibration in Nuclear Engineering [M]. Shanghai: Shanghai Jiaotong University Press, 2018.
[2] Price S J. A Review of Theoretical-Models for Fluidelastic Instability of Cylinder Arrays in Cross-Flow[J]. Journal of Fluids and Structure, 1995, 9(5): 463-518.
[3] Beatriz de Pedro, Jorge Parrondo, Craig Meskell, Jesús Fernández Oro. CFD modelling of the cross-flow through normal triangular tube arrays with one tube undergoing forced vibrations or fluidelastic instability[J]. Journal of Fluids and Structures, 2016, 64: 67–86.
[4] Ahmed Khalifa, David Weaver, Samir Ziada. Modeling of the phase lag causing fluidelastic instability in a parallel triangular tube array[J]. Journal of Fluids and Structures, 2013, 43: 371-384.
[5] 冯志鹏, 蔡逢春, 臧峰刚,等. 管束结构流弹失稳的数值预测方法研究[J]．振动与冲击（已录用）．
Feng Zhipeng, Cai Fengchun, Zang Fenggang, et al. Investigation on Numerical Estimation Approach of Fluidelastic Instability in Tube Bundle[J]. Journal of vibration and shock (Accepted).
[6] Khalifa A, Weaver D, ZiadaS. Modeling of the phase lag causing fluidelastic instability in a parallel triangular tube array[J]. Journal of Fluids and Structures, 2013, 43: 371-384.
[7] Mahon J, Meskell C. Surface pressure distribution survey in normal triangular tube arrays[J]. Journal of Fluids and Structures, 2009, 25: 1348-1368.
[8] Weaver D S, Fitzpatrick J A. A review of cross-flow induced vibrations in heat exchanger tube arrays[J]. Journal of Fluids and Structure, 1988, 2: 73-93.
[9] Weaver D S, Yeung H C. Approach flow direction effects on the cross-flow induced vibrations of a square array of tubes[J]. Journal of Sound and Vibration, 1983, 3: 469-482.
[10] Norberg C. Fluctuating lift on a circular cylinder: review and new measurements[J]. Journal of Fluids and Structures, 2003, 17: 57-96.
[11] 冯志鹏, 臧峰刚, 张毅雄. 流体诱发传热管振动的流场特性分析[J]. 核动力工程, 2014, 35(2): 71:75.
Feng Zhipeng, Zang Fenggang, Zhang Yixiong, et al. Flow Characteristic Analysis of Flow Induced Heat Exchanger Tube Vibration[J]. Nuclear Power Engineering. 2014. 35(2): 71:75 (in chinese).
