Numerical Simulation of Solid Liquid Two-phase Flow Erosion in Trussed Overflow Three-eccentric Butterfly Valves
The Euler-Lagrange method of computational fluid dynamics was employed to simulate the erosion of a trussed overflow three-eccentric butterfly valve subjected to solid liquid two-phase flow.The results demonstrate that a reduction in the flow cross-sectional area in the vicinity of the valve results in a significant alteration in the pressure drop within the flow field in close proximity to the valve.This,in turn,gives rise to an increase in the velocity of the liquid medium and the solid particles carried by it,which consequently causes severe erosion to the water-facing wall of the valve seat.As the valve opening increases,the pressure before and after the valve decreases,the velocity of the liquid medium and solid particles decreases,and the erosion area increases while the erosion rate decreases on the water-facing wall of the valve seat.The erosion rate on the valve increases with the increase of the liquid inlet velocity or the solid particle mass flow rate.Under the same solid particle mass flow rate,the erosion rate is primarily determined by the erosion frequency and particle mass.
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