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.
Highlights
THE two-phase flow through singularities such as orifices, nozzles and venture-meters is encountered in many engineering applications such as chemicalReceived: (21 August, 2020) - Revised: (7 September, 2020) - Accepted: (15 September, 2020)Monni et al [1] investigated experimentally the annular two-phase flow through a venturi flow meter in a vertical upward pipe (80 mm inner diameter)
The value of the two-phase pressure drop between the venturi flow meter inlet section and throat section, and between inlet section and outlet section were dependent on the two-phase flow parameters
The aim of the present study is to investigate the behavior of the two-phase flow characteristics through three different sizes orifice plates
Summary
THE two-phase flow through singularities such as orifices, nozzles and venture-meters is encountered in many engineering applications such as chemicalReceived: (21 August, 2020) - Revised: (7 September, 2020) - Accepted: (15 September, 2020)Monni et al [1] investigated experimentally the annular two-phase flow through a venturi flow meter in a vertical upward pipe (80 mm inner diameter). THE two-phase flow through singularities such as orifices, nozzles and venture-meters is encountered in many engineering applications such as chemical. Received: (21 August, 2020) - Revised: (7 September, 2020) - Accepted: (15 September, 2020). Monni et al [1] investigated experimentally the annular two-phase flow through a venturi flow meter in a vertical upward pipe (80 mm inner diameter). The experiments were performed at air void fraction values up to 0.97 to simulate nuclear accident cases. The value of the two-phase pressure drop between the venturi flow meter inlet section and throat section, and between inlet section and outlet section were dependent on the two-phase flow parameters (phase velocities, void fraction and dryness fraction). New correlations were proposed to relate the flow rate as a function of the twophase pressure drop.
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