Effect of Beta-Ratio in Multiple Restricted Orifice in Flow through Pipes

Multi-stage orifice assemblies are used in many industrial processes as pressure reduction devices. Performance characteristics of orifice plates for variation in different geometrical parameters are examined with the help of computational fluid dynamics (CFD). In the present study, a CFD methodology using ANSYS, Fluent 19.1 software has been used for analyzing flow through multiple orifice plate assemblies. A parametric study is conducted for flow analysis through threefold orifice plate assemblies with diameter ratio (β = 0.5, 0.65, 0.7) in a pipe of 3, 4 and 5 inch diameter. It is found that a spacing between inlet to orifice and orifice to orifice is kept as 5D. The value of Coefficient of Discharge depends on the type of flow, pressure tapping’s, contour of the obstruction. The results and outcomes of the study are obtainable with velocity and pressure contours. The pressure drop and the velocity of flow along the pipe is studied.