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Transient Regulating Characteristics of V-Port Ball Valve in Opening and Closing Process


 V-port ball valves are widely used control elements in fluid transmission system, and have the function of throttling and controlling the flow direction. However, the flow law of V-port ball valve in the opening and closing process is unclear, especially the influence of different cone angles on the valve regulation process. This paper takes V-port ball valve as the research object and studies the transient regulation performance and internal flow law of V-port ball valve with different cone angles in the opening and closing process through experiment and numerical simulation. Results show that the flow rate, pressure, and flow coefficient of V-port ball valve in the opening process is greater than that in the closing process, but their values are the same after stabilization. The V-port cone angle affects the flow rate, pressure, and flow coefficient in the valve. The maximum flow rate and flow coefficient increases with the increase in the cone angle. The value of inlet pressure and the initial opening in which the outlet pressure begins to reduce decrease with the increase in the cone angle. In the valve regulation process, interaction between the flow and the cone leading edge produces a large flow variation. As the cone angle increases, the variation degree at the leading edge weakens. The conclusions of this study can provide reference for the design and optimization of V-port ball valves.