Journal of Shanghai Jiao Tong University (Science) ›› 2019, Vol. 24 ›› Issue (3): 341-350.doi: 10.1007/s12204-019-2061-y

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

LI Shuxun *(李树勋), ZHU Lu (朱禄), WANG Weibo (王伟波), XIAO Kuijun (肖奎军), XU Xiaogang (徐晓刚), ZHANG Baosheng (张宝生)   

  1. (1. School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. Qinhuangdao Qinye Heavy Industry Co., Ltd., Qinhuangdao 066318, Hebei, China)
  • 出版日期:2019-06-01 发布日期:2019-05-29
  • 通讯作者: LI Shuxun *(李树勋) E-mail:gdlishuxun@126.com

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

LI Shuxun *(李树勋), ZHU Lu (朱禄), WANG Weibo (王伟波), XIAO Kuijun (肖奎军), XU Xiaogang (徐晓刚), ZHANG Baosheng (张宝生)   

  1. (1. School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. Qinhuangdao Qinye Heavy Industry Co., Ltd., Qinhuangdao 066318, Hebei, China)
  • Online:2019-06-01 Published:2019-05-29
  • Contact: LI Shuxun *(李树勋) E-mail:gdlishuxun@126.com

摘要: 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 0.5MPa 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.

关键词: link butterfly valve, thermal-fluid-structure coupling, stress deformation, resonance forecast

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 0.5MPa 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.

Key words: link butterfly valve, thermal-fluid-structure coupling, stress deformation, resonance forecast

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