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Characterization of Flow Homogeneity Downstream of a Slotted Orifice Plate in a Two-Phase Flow Using Electrical Resistance Tomography

机译:使用电阻层析成像表征两相流中缝隙孔板下游的流均质性

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摘要

The accurate measurement of two-phase flow parameters has always been a key issue for many industries. Advancements in flow measurement techniques led to the development of multiphase flow meters which can measure it without separating it to individual phases. This technique is based on the homogeneous flow model which treats the two-phase flow as a single-phase flow at the homogenized location. It has been experimentally proven that a slotted orifice plate is a better flow homogenizer than a standard orifice plate and a V-cone. However, the location downstream of the slotted orifice plate where the two-phase flow becomes most homogeneous is still not known. Knowing this would help in accurate flow metering of the two-phase flow as the sensors (such as the electrical impedance sensor) can be placed at the most homogenized location. Electrical Resistance Tomography (ERT) is a non-invasive measurement technique that determines the conductivity distribution of the flow inside a pipe. The conductivity data can be used to determine concentration data by using the Maxwell?s equation. By analyzing the concentration distribution of the components in a two-phase flow at various locations, the optimum location downstream of the slotted orifice plate where the two-phase flow becomes most homogeneous for different flow conditions can be determined.
机译:两相流参数的准确测量一直是许多行业的关键问题。流量测量技术的进步导致了多相流量计的发展,该流量计可以测量多相流量计而无需将其分离为各个相。该技术基于均质流模型,该模型在均质位置将两相流视为单相流。实验已经证明,与标准孔板和V型锥相比,开孔孔板是更好的流动均质器。然而,开孔板下游的两相流变得最均匀的位置仍然是未知的。知道这一点将有助于准确测量两相流,因为可以将传感器(例如电阻抗传感器)放置在最均匀的位置。电阻层析成像(ERT)是一种非侵入性的测量技术,可确定管道内流体的电导率分布。电导率数据可通过使用麦克斯韦方程来确定浓度数据。通过分析两相流中各个位置的组分浓度分布,可以确定开缝孔板下游的最佳位置,在该位置两相流对于不同的流动条件变得最均匀。

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    Annamalai, Gautham;

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  • 年度 2015
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  • 原文格式 PDF
  • 正文语种 en
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