Lin Zhe, Yin Dapeng, Tao Junyu, Li Yi, Sun Jin, Zhu Zuchao
National-Provincial Joint Engineering Laboratory for Fluid Transmission System Technology, Zhejiang Sci-Tech University, 5 Second Avenue, Xiasha Higher Education Zone, Hangzhou, 310018, China.
Bray (China) Control System Co., Ltd., No. 6 Gaoxin Road, Xiaoshan Economic and Technological Development Zone, Hangzhou 310018, China.
J Fluids Eng. 2020 Nov 1;142(11):111202. doi: 10.1115/1.4047795. Epub 2020 Aug 7.
In this study, computational fluid dynamics (cfd) software and detached eddy simulation turbulence model were used to simulate butterfly valves with different designs. The effects of shaft diameters on the value and the fluctuation of valve disk torque were studied, and the physical reason was discussed. The simulation results were verified by comparing with the experimental data. The findings revealed that with the closing of the valve, the hydraulic torque of the valve disk first increases and then decreases. Meanwhile, the torque decreases gradually with the increase of the shaft diameter. The variation of torque is caused by the change of pressure on both sides of the valve disk. The result also indicates that the fluctuation of torque is induced by the flow separation phenomenon occurs on the valve disk. The fluctuation is significant for the valve opening from 20% to 60%. The strength of the torque fluctuation is greater for the smaller shaft diameter. This study provides a theoretical basis for the design and optimization of butterfly valves.
在本研究中，使用计算流体动力学（CFD）软件和分离涡模拟湍流模型对不同设计的蝶阀进行模拟。研究了轴径对阀盘扭矩值和波动的影响，并探讨了其物理原因。通过与实验数据对比对模拟结果进行验证。研究结果表明，随着阀门关闭，阀盘的水力扭矩先增大后减小。同时，扭矩随着轴径的增大而逐渐减小。扭矩的变化是由阀盘两侧压力的变化引起的。结果还表明，扭矩波动是由阀盘上发生的流动分离现象引起的。在阀门开度从20%到60%时，波动较为显著。轴径越小，扭矩波动强度越大。本研究为蝶阀的设计和优化提供了理论依据。
