CALCULATION OF COEFFICIENT OF DISCHARGE OF ORIFICE PLATE AND FLOW NOZZLE USING CFD ANALYSIS

Abstract

ABSTRACT

An orifice plate is a device used for measuring flow rate. Either a volumetric or mass flow rate may be determined, depending on the calculation associated with the orifice plate. A nozzle is a device designed to control the direction or characteristics of a fluid flow (especially to increase velocity) as it exits (or enters) an enclosed chamber or pipe. Flow nozzle has high coefficient of discharge than orifice plate .The present work is directed towards the to study the flow through an orifice plate and a long radius flow nozzle’ obstruction flow meters are commonly in use to measure flow rates in pipes. Both the orifice and nozzle are modeled inside a pipe with an inner diameter of 50 mm and a length of 1m water in the pipe flows with a mean velocity of 1m/s corresponding to Reynolds number 50,000.Thedischarge coefficients are determined and compared with experimental values. The cut plots, XY plots, flow trajectories for orifice plate and flow nozzle are displayed. The center line velocity varies along the length of the pipe for both the cases and plotted pressure, velocity fields.

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