排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2013, Vol. 31 Issue (2): 157-161    DOI: 10.3969/j.issn.1674-8530.2013.02.014
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3D flow numerical simulation of ball valve based on CFD
 ZHANG  Sheng-Chang, ZHANG  Yu-Lin,   Fang-Zhi-Ming,   Ke-Yu-Long
(School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China)
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Abstract To explore the flow field law of the outlet ball valve of the new rotor oilgas mixed pump, a 3D model of ball valve flow field was established. Using Fluent software, combining standard   turbulent model and multiphase flow technology together, adopting SIMPLE algorithm, a 3D gasliquid doublephase flow field in outlet ball valve of new rotor oilgas mixed pump was numerically simulated. With gas fraction of 25%, 50% and 75% and valve′s opening height at 3, 5 and 7 mm respectively, velocity field, pressure field and the distribution of liquid and gas was analyzed. The law of valve′s opening height and different gasliquid ratio′s effect on outlet ball valves in the process of gasliquid mixing was discussed. The simulation results show that, the greater the opening height, the smaller the pressure difference between ball valves.The gap flow velocity decreases as the open height increases. Gas mainly flows in the vicinity of the valve ball in the process of gasliquid mixing. At the same opening height, gasliquid ratio has little effect on gap flow velocity. The experiment directly shows flow field forms in the ball valve and, to a certain degree, reveals the law of gasliquid flow in the ball valve, providing a theoretical guidance for the design and optimization of new rotor oilgas mixed pump outlet ball valve.
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Articles by authors
ZHANG Sheng-Chang
ZHANG Yu-Lin
Fang-Zhi-Ming
Ke-Yu-Long
Key wordsball valve   gasliquid doublephase   numerical simulation   gasliquid ratio   opening     
Received: 2012-07-02; Published: 2013-02-28
Cite this article:   
ZHANG Sheng-Chang,ZHANG Yu-Lin, Fang-Zhi-Ming et al. 3D flow numerical simulation of ball valve based on CFD[J]. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(2): 157-161.
 
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