Numerical analysis of flow resistance performance of sealed valve under high flow conditions
In order to investigate the flow resistance performance of a DN2000 large-sized four-link sealed butter-fly valve,computational fluid dynamics numerical simulation methods were employed.A numerical model of the valve flow resistance test system was established to simulate fluid flow processes under different velocities,analyze flow field characteristics,and examine valve flow resistance characteristics.The results indicate that the valve link-age mechanism and valve disc significantly disturb the flow field,serving as the main factors causing local pressure loss in the valve.In contrast,the impact of the through-flow rib plate on the flow field is relatively small.Local re-sistance in the valve increases with an increase in flow velocity,while the valve flow resistance coefficient decreases with an increase in flow velocity.When the Reynolds number is relatively large(Re>1.52×106),the flow resist-ance coefficient remains essentially unchanged.
linkage butterfly valveflow resistance coefficientnumerical simulationflow field characteristic
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