Quantitative Analyses of Electrohydrodynamically Induced Phenomena in Gas-Liquid Two-Phase Fluid

在这项工作中，定量分析了电流体动力诱导的气液两相流体流动现象进行了。流体流动速度从粒子图像测速仪使用磷光跟踪获得。为了实现气液两相电流体动力学现象的分析方法，对由实验结果导出的一些无量纲参数随流体流速的变化进行了详细的计算。针对多相流体流动认识中渐进式研究的需要，本文主要取得了以下研究成果.气液两相流分子标记测速技术的发展将分子标记技术应用于粒子图像测速技术中，以消除示踪粒子的干扰。分子标记程序是从一个图像捕获设备的时间分辨率为10纳秒和双乙酰分子示踪剂的可见磷光时间持续几毫秒的顺序。这使得我们能够测量电流体动力学诱导的气液两相流的速度.气液电流体动力学中的导电力和介电力的分析在上述实验结果的基础上，对导电力和介电力进行了分析，以找出气液电流体动力学的无量纲参数。这使得我们能够定量分析电液动力学诱导的多相流现象.研究了一种新型的非侵入式两相电液动泵。通过流体流量测量和无量纲参数对泵送性能进行了实验和分析评价。定量表征了电流体动力学对泵送性能的影响。

In this work, quantitative analyses of electrohydrodynamically induced gas-liquid two-phase fluid flow phenomena have been conducted. The fluid flow velocity was obtained from a particle image velocimetry using a phosphorescence trace. In order to realize the analysis method for the gas-liquid two-phase electrohydrodynamic phenomenon, some non-dimensional parameters derived from the experimental results with fluid flow velocity were evaluated in detail. For requirements of progressive investigation in multi-phase fluid flow understanding, this work presented as following research results.1. Development of a molecular tagging velocimetry for the gas-liquid two-phase flow measurements.An application of molecular tagging procedure to the particle image velocimetry was conducted to prevent the disturbances due to the charged tracer particles. The molecular tagging procedure was developed from an image capture device with a time-resolution rate of 10 nanosecond and a biacetyl molecular tracer with visible phosphorescence time continuing a few millisecond order. It was enabled us to measure the electrohydrodynamically induced gas-liquid two-phase flow velocity.2. Analyses of conductive and dielectric forces in gas-liquid electrohydrodynamicsFrom the above experimental results, conductive and dielectric forces were analyzed in order to find out the non-dimensional parameters of the presented gas-liquid electrohydrodynamics. It was enabled us to quantitatively analyze the electrohydrodynamically induced multi-phase flow phenomena.3. Application of this phenomena to liquid pumpA new type of non-intrusive two-phase electrohydrodynamic pump was investigated. The pumping performance was experimentally and analytically evaluated by the fluid flow measurements and the non-dimensional parameters. An electrohydrodynamical effect on the pumping performance was quantitatively characterized.