Performance of an Orifice Meter Handling Two-Phase (Gas-Liquid) Flow.

Document Type : Research Studies

Authors

1 Volume and Fluid Flow Metrology Laboratory, National Institute of Standards, Egypt

2 Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University

3 Aeronautical and Aerospace Engineering Department, Faculty of Engineering, Cairo University, Cairo, Egypt

4 Mechanical Engineering Department, Faculty of Engineering, Mansoura University, AlMansoura, Egypt

Abstract

— The two-phase flow rate measurements remain a challenging task due its complexity. There are many factors that affect on the measurement process such as the properties of the two phases and the dryness fraction. In the current study, the two-phase flow through three orifice plates with different beta ratios (orifice diameter to pipe inner diameter ratio) of 0.7, 0.63, and 0.5 installed in a horizontal acrylic pipe with an inside diameter of 60 mm has been experimentally investigated to improve the accuracy of the two-phase mass flow rate measurements. The inlet superficial velocities of liquid and gas phases are rated from 0.8 to 2.4 m/s and from 0.0 to 0.79 m/s, respectively. Also, the average gas volume fraction is rated from 0.0 to 61%. The pressure drop through the three orifice plate was measured and the flow patterns were tackled before and after the orifice plate.
The effect of the two-phase flow on the orifice correction factor is studied at different liquid and gas mass flow rate values for the three orifice plates with different beta ratios. Also, a new correlation was introduced for the two-phase correction factor through the three orifice plates.

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MEJ- Mansoura Engineering Journal
Volume 45, Issue 3
September 2020
Pages 29-38

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