Investigation on Fluidelastic Instability of Square Tube Bundle Based on Dynamic Mode Decomposition Method

Feng Zhipeng; Xiong Furui; Zhao Xielin; Cai Fengchun; Zhou Jinxiong

doi:10.13832/j.jnpe.2023.S2.0104

Volume 44 Issue S2

Dec. 2023

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Feng Zhipeng, Xiong Furui, Zhao Xielin, Cai Fengchun, Zhou Jinxiong. Investigation on Fluidelastic Instability of Square Tube Bundle Based on Dynamic Mode Decomposition Method[J]. Nuclear Power Engineering, 2023, 44(S2): 104-108. doi: 10.13832/j.jnpe.2023.S2.0104

Citation:

Feng Zhipeng, Xiong Furui, Zhao Xielin, Cai Fengchun, Zhou Jinxiong. Investigation on Fluidelastic Instability of Square Tube Bundle Based on Dynamic Mode Decomposition Method[J]. Nuclear Power Engineering, 2023, 44(S2): 104-108. doi: 10.13832/j.jnpe.2023.S2.0104

Citation:

Feng Zhipeng, Xiong Furui, Zhao Xielin, Cai Fengchun, Zhou Jinxiong. Investigation on Fluidelastic Instability of Square Tube Bundle Based on Dynamic Mode Decomposition Method[J]. Nuclear Power Engineering, 2023, 44(S2): 104-108. doi: 10.13832/j.jnpe.2023.S2.0104

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Investigation on Fluidelastic Instability of Square Tube Bundle Based on Dynamic Mode Decomposition Method

doi: 10.13832/j.jnpe.2023.S2.0104

1.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China
2.
State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering,Xi’an Jiaotong University, Xi’an, 710049, China

Received Date: 2023-07-11
Rev Recd Date: 2023-09-08
Publish Date: 2023-12-30

Abstract

Abstract

The current study of fluidelastic instability mainly depends on macro-response, and there is no technical means to judge stability from a more essential level. In this study, the square tube bundle is taken as the object. Firstly, based on the three-dimensional fluid-structure interaction analysis model, the vibration response and fluid force characteristics of each tube are obtained, and the macroscopic response characteristics of the tube bundle are studied. Secondly, the dynamic mode decomposition (DMD) method is introduced to decompose and reconstruct the fluid-structure interaction system, and then the fluidelastic instability of the tube bundle is studied from the two aspects of macro response and DMD mode. The results show that DMD method can not only realize the rapid reconstruction and prediction of the dynamic characteristics of the flow field, but also accurately extract the dominant modes and frequencies of the unstable flow field, and judge the stability of the extracted modes. Combining with the macro response, this method can reflect the stability of the system more comprehensively.
- Fluid-elastic instability,
- Fluid-structure interaction,
- Tube bundle,
- Dynamic mode decomposition (DMD)

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References(8)

References

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