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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >VISUALISATION OF TWO-PHASE GAS-LIQUID PIPE FLOWS USING ELECTRICAL CAPACITANCE TOMOGRAPHY
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VISUALISATION OF TWO-PHASE GAS-LIQUID PIPE FLOWS USING ELECTRICAL CAPACITANCE TOMOGRAPHY

机译：电容层析成像法对两相气液管道的可视化

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摘要

Electrical Capacitance Tomography (ECT) has been used over a number of years to measure concentration distribution, and more recently velocity distribution, in two-phase flows. ECT is non-intrusive, and the reconstruction of the concentration and velocity distribution can be undertaken in real time and over an arbitrary number of zones in the flow cross-section. In this paper the concept of a 'virtual instrument' is introduced where zones of the image can be structured for comparison with other measurements. Numerical agreement with gamma-ray density measurements is shown to be excellent in slug and stratified flows. We present a series of measurements undertaken in complex oil/gas slug flows in a large flow loop. We present a variety of 2-D cross-sectional images, time series velocity and concentration graphs and 3-D contour plots. The good temporal and spatial resolution of ECT throws an extensive new light on these otherwise difficult to measure dynamic flow structures. In particular with bubbly-slug structures known as 'ghosts' ECT shows clearly that they are in fact bubbly waves which have extended 'wings' up and around the pipe.
机译：电容层析成像（ECT）多年来已经用于测量两相流中的浓度分布，以及最近的速度分布。 ECT是非侵入性的，浓度和速度分布的重建可以实时进行，并且可以在流动横截面的任意数量的区域上进行。在本文中，引入了“虚拟仪器”的概念，可以在其中构造图像区域以与其他测量进行比较。结果表明，与γ射线密度测量值的数值一致性在弹状流和分层流中表现出色。我们介绍了在大流量回路中对复杂的油/气塞流进行的一系列测量。我们展示了各种2-D横截面图像，时间序列速度和浓度图以及3-D等高线图。 ECT良好的时间和空间分辨率为这些原本难以测量的动态流动结构带来了广阔的新前景。尤其是在被称为“鬼影”的气泡状结构中，ECT清楚地表明，它们实际上是气泡状的波浪，在管道周围和周围延伸了“翅膀”。

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