Abstract

This study is an effort to comprehend the description of the vapour-liquid flows associated with the transformation of the phase, which may assist in determining mass, momentum and energy transfer within the interfacial region containing the steam and water. This study describes the development of a void fraction measurement sensory system, which is based on AC based electrodes, referred scientifically as Electrical Resistance Tomography (ERT) system. ERT sensors based system was applied to emphasize the phenomenon involving supersonic steam injection into a column of water. Data acquisition system supporting the ERT technique was applied for the given time interval and the acquired data was processed by using a free code known as EIDORS. Images thus obtained by use of EIDORS provided a planar picture of supersonic steam jet surrounding by the water in a vessel. Images represent the broadly visible boundaries among steam and water phases, and the turbulent interface between them. It has been found that with rising temperature 30–60°C, the area under the effect of the steam jet has been increased from 46.51–65.40% at 3.0 bar of steam’s inlet pressure.

中文翻译：

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基于电导率传感器的系统开发和应用研究超音速蒸汽射流和水之间的界面行为

摘要

这项研究旨在理解与相转变相关的汽液流动的描述，这可能有助于确定包含蒸汽和水的界面区域内的质量、动量和能量传递。本研究描述了空隙率测量传感系统的开发，该系统基于交流电极，科学地称为电阻断层扫描 (ERT) 系统。应用基于 ERT 传感器的系统来强调涉及将超音速蒸汽注入水柱的现象。在给定的时间间隔内应用支持 ERT 技术的数据采集系统，并使用称为 EIDORS 的免费代码处理采集的数据。由此通过使用 EIDORS 获得的图像提供了船只中水周围的超音速蒸汽喷射的平面图。图像代表了蒸汽和水相之间广泛可见的边界，以及它们之间的湍流界面。已经发现，随着温度升高 30-60°C，在 3.0 bar 的蒸汽入口压力下，蒸汽射流作用下的面积从 46.51-65.40% 增加。