Archive
Special Issues
The Flow Field Analysis and Structure Optimization of Large Diameter Butterfly Valve
American Journal of Mechanical and Industrial Engineering
Volume 5, Issue 4, July 2020, Pages: 59-63
Received: Aug. 24, 2020; Accepted: Sep. 11, 2020; Published: Sep. 21, 2020
Authors
Wang Yuhao, Aerospace Science and Technology Microsystem Technology Co., Ltd, Nanjing, China
He Qingzhong, College of Mechanical Engineering, Sichuan University of Science and Engineering, Zigong, China
Article Tools
Abstract
The large diameter butterfly valve used in Qinghai Naqu hydropower station was subjected to strong vibration when the opening was small. In view of the phenomenon of strong vibration and damage of the valve, the fluid theory analysis is carried out and the appropriate mathematical model of fluid analysis is selected. This paper established the flow model of butterfly valve for different opening degrees with the 2D drawings and simulated the flow field by using CFX software. Through numerical simulation, the flow field characteristics of the valve under different opening degrees are obtained, and it is found that the valve failure is caused by vortex street effect. The results of numerical analysis show that the vortex are the most strong in the range of 5% to 30% and The vortex street phenomenon is the strongest at 5% opening. When the opening is greater than 30%, the vortex street effect decreases gradually. Meanwhile, the reason of vortex street effect is that the structure of butterfly plate is complex, and an improved structure was given and the results of numerical analysis show that the vortex effect decreased significantly for the new one. This new structure can effectively prevent the vortex resonance and give an example for the new design of a large butterfly valve.
Keywords
Butterfly Valve, CFX Software, Vortex Resonance, Structure Optimization
Wang Yuhao, He Qingzhong, The Flow Field Analysis and Structure Optimization of Large Diameter Butterfly Valve, American Journal of Mechanical and Industrial Engineering. Vol. 5, No. 4, 2020, pp. 59-63. doi: 10.11648/j.ajmie.20200504.12
References
[1]
TONG Chengbiao. Optimization design and flow field research of butterfly valve. Changsha, School of mechanical and transport engineering, Hunan University, 2010.
[2]
LIli, SHI Zhihui, ZAHO Jinglong. Numerical simulation of flow field around vortex street and vortex flowmeter. Journal of Dalian Jiaotong University, 2014, 35 (6): 32-35.
[3]
DENG Jian, LI Jinghu, ZHU Ayuan. Research on Karman vortex street effect of UAV with skid. Aircraft design, 2014, 34 (3): 1-3.
[4]
Min Qiangli. Numerical simulation of Karman vortex street with low Reynolds number. Journal of Sichuan military engineering, 2009, 30 (11): 81-83.
[5]
Pang Lijun, LV Guiping, Zhong Su. Vortex street simulation and vibration analysis of turbine fixed guide vane. Journal of mechanical engineering, 2011, 47 (22): 159-166.
[6]
Shi Yiping, Zhou Yurong. ABAQUS finite element analysis example details. Beijing: China Machine Press, 2006: 126.
[7]
Zhang Qinzhao, Liu Fusheng, Wang Hong. Study on flow field and resistance characteristics of triple eccentric butterfly valve. Fluid machinery, 2013, 41 (11): 1-5.
[8]
Ding Yuan, Wu Jihua. ANSYS CFX 14.0 from introduction to mastery. Beijing: Tsinghua University Press, 2013.
[9]
Jia Rumin, Zhang Weizheng. CFD numerical simulation and flow path optimization of control valve. Chemical machinery, 2009, 36 (2): 131-134.
[10]
Li Jianwei, Xiao Liangyu. Research on vibration characteristics of butterfly valve disc of Francis turbine. Valve, 2013, 6: 15-17.
[11]
Wang Dong, Zhang Siqing and Zhang Yunlong. Dynamic analysis and dovetail modification of turbine fixed guide vane vortex street. China electric power, 2014, 0 (11): 5-9.
[12]
Li Tong, Zhou Jianjia, Yuan Shouqi. Static analysis of spiral centrifugal pump impeller based on flow field calculation. Fluid machinery, 2013, 41 (12): 22-26.
PUBLICATION SERVICES