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Analysis of Thermal-Fluid-Structure Coupling and Resonance Forecast for Link Butterfly Valve Under Small Opening

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Abstract

When the link butterfly valve operates at a small opening degree in high temperature working conditions, it is prone to the problem that the valve is stuck, the strength is insufficient and the butterfly plate is violently vibrating. This paper shows simulation experiments of both thermal-fluid-structure coupling and resonance forecast about DN600 link butterfly valve in the working conditions of 250 °C and 0.5 MPa by ANSYS software. The medium is mixed with compressed air and flue gas. Flow field characteristics of the valve and stress deformation, modal and flow-induced vibration of butterfly plate are analyzed when the valve opening is less than 30%. The results indicate that, when the valve opening is less than 30%, fluid flow is relatively smooth in front of butterfly plate, a large number of vortexes are found behind the butterfly plate, and fluid flow is greatly chaotic in this position. The equivalent maximum stress and deformation of butterfly plate are relatively large when the valve locates in openings between 10% and 30%; the intensity of the butterfly plate is enough; the axial deformation does not impact opening and closing of the valve. The butterfly plate is likely resonant when the valve opening is less than 10%. The research of this paper provides a crucial reference for flow field characteristics of link butterfly valve, an analysis of intensity and rigidity of butterfly plate, and a resonance forecast of butterfly plate when the valve works in small opening.

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Authors and Affiliations

  1. School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, 730050, China

    Shuxun Li  (李树勋), Lu Zhu  (朱禄), Weibo Wang  (王伟波) & Xiaogang Xu  (徐晓刚)

  2. Qinhuangdao Qinye Heavy Industry Co., Ltd., 066318, Qinhuangdao, Hebei, China

    Kuijun Xiao  (肖奎军) & Baosheng Zhang  (张宝生)

Authors
  1. Shuxun Li  (李树勋)
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  2. Lu Zhu  (朱禄)
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  3. Weibo Wang  (王伟波)
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  4. Kuijun Xiao  (肖奎军)
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  5. Xiaogang Xu  (徐晓刚)
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  6. Baosheng Zhang  (张宝生)
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Correspondence to Shuxun Li  (李树勋).

Additional information

Foundation item: the National Natural Science Foundation of China (No. 51569012)

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Li, S., Zhu, L., Wang, W. et al. Analysis of Thermal-Fluid-Structure Coupling and Resonance Forecast for Link Butterfly Valve Under Small Opening. J. Shanghai Jiaotong Univ. (Sci.) 24, 341–350 (2019). https://doi.org/10.1007/s12204-019-2061-y

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  • DOI: https://doi.org/10.1007/s12204-019-2061-y

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