Structural Design Of The Slotted Orifice Using CFD

In order to enhance the accuracy of wet gas measurement, a new type of differential pressure meter has developed as a"drop-in"replacement for the standard plate in an orifice flow meter. With the help of Computational Fluid Dynamics (CFD) technology, the static pressure, velocity contours across the standard orifice flow meter and the slotted orifice flow meter have been compared and analyzed. The slotted plate flow meter is better in performance and accuracy than the standard orifice plate flow meter as the results show. And then, analyzes the response characteristics of slotted orifice plates with different slot width, slot length, slot shape, slot placement, plate thickness and slot inlet. According to the results, optimizes the design of slotted orifice plate. A slotted orifice flow meter is subjected to a two phase flow consisting of air and water. At different Reynolds number, the effects of varying the upstream quality of the two-phase flow on the differential pressure and the coefficient of slotted orifice flow meter will be evaluated. Rules of design parameter are found to provide the basis for the orifice structural design. The thesis designs and optimizes the structure of the slotted orifice flow meter, and it is helpful to accurately measure the flow rate of two-phase flow.