Low-frequency modes in the fluid-structure interaction of a U-tube model for the steam generator in a PWR

Zhang, Hao; Chang, Sung‐Pil; Kang, Soong-Hyun

doi:10.1016/j.net.2019.02.005

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…Predicting the vibration amplitude of SG tube bundles is a challenging task due to complex geometrical configurations and the significant range of void fractions and the two-phase flow patterns. Although a few numerical studies [16][17][18][19][20] was perform on the thermal-hydraulic characteristics in a steam generator, the focus on variation trends of the U-tube vibrations under different working conditions has been rarely explored. Additionally, little attention was paid to the conservatism of the numerical method, which was essential to demonstrating the safe operation of a newly designed nuclear facility.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Flow-Induced Vibration of PWR Steam Generator U-Tubes

Xiong¹,

Li²,

Zhu³

et al. 2022

The International Journal of Acoustics and Vibration

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The flow-induced vibration (FIV) of steam generators (SGs) in pressurized water reactors (PWRs) is a significant problem in the design process. This problem contains issues such as two-phase flow, nonlinear dynamics and fretting wear. In this paper, an experimental setup was established to study the FIV of a newly designed U-tube SG. Numerical simulations, including computational fluid dynamics (CFD) and vibration studies were performed to reveal the detailed mechanisms of FIV. To study the U-bend region of the tube bundles, the experiments were carried out under 23 experimental conditions containing void fractions of 70%, 80%, 90 and 95%. The flow fields of the tested model in each condition were calculated to reveal the causes of the vibration phenomenon, and the vibration results were calculated through structure dynamics. The experimental results showed that the vibration amplitudes of the U-tube increased with increasing inlet velocity, flow rate and bending radius. It decreased with increasing void fraction under the same inlet velocity, while it increased with increasing void fraction under the same flow rate. Along with the out-of-plane vibration, the in-plane vibration also featured high amplitude vibration of the U-tubes due to lack of support by the anti-vibration bars (AVBs). The simulation results show the same variation trends of the vibration responses as the above experiments. The prototype SG can be fluid-elastic stable in given working conditions, and the main vibration mechanism of this model is turbulence buffeting. The experiment and simulation methods and data can be used in the design process of new SGs similar to this prototype.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Flow-Induced Vibration of PWR Steam Generator U-Tubes

Xiong¹,

Li²,

Zhu³

et al. 2022

The International Journal of Acoustics and Vibration

View full text Add to dashboard Cite

show abstract

“…Moreover, studies concerning fluid-solid coupling of the circulating cooling water are even fewer. Zhang et al 17 studied the fluidstructure interaction simulation analysis of U-shaped tubes. The corresponding experiment was carried out to confirm the simulation results.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al. 17 studied the fluid–structure interaction simulation analysis of U-shaped tubes. The corresponding experiment was carried out to confirm the simulation results.…”

Section: Introductionmentioning

confidence: 99%

Modal analysis of central impression cylinder based on fluid–solid coupling method

Hou

Rui

Deng

et al. 2020

Journal of Low Frequency Noise, Vibration and Active Control

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As a key component of satellite flexographic printing equipment, the vibration characteristics of the central impression cylinder have an important effect on the product quality. In order to improve dynamic characteristic of the central impression cylinder, the modal analysis on the central impression cylinder is carried out in combination with finite element software in this paper. Then, the modal properties are systematically compared between the central impression cylinder with circulating cooling water and without. The results show that the natural frequency of the central impression cylinder is greatly reduced based on the fluid–solid coupling method. Simultaneously, the natural frequencies and mode shapes of the central impression cylinder based on the finite element analysis are verified by an experimental test. The simulation results are in good agreement with the experimental results, indicating the effectiveness of the finite element model and experimental method used in this study.

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Experimental study and analysis of design parameters for analysis of fluidelastic instability for steam generator tubing

Xiong

Zhu

Teng

et al. 2023

Nuclear Engineering and Technology

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Low-frequency modes in the fluid-structure interaction of a U-tube model for the steam generator in a PWR

Cited by 6 publications

References 4 publications

Experimental and Numerical Study on Flow-Induced Vibration of PWR Steam Generator U-Tubes

Experimental and Numerical Study on Flow-Induced Vibration of PWR Steam Generator U-Tubes

Modal analysis of central impression cylinder based on fluid–solid coupling method

Experimental study and analysis of design parameters for analysis of fluidelastic instability for steam generator tubing

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