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

本文对电流体动力诱导气液两相流动现象进行了定量分析。流体流动速度由粒子图像测速仪利用磷光示踪获得。为了实现对气液两相电流体动力学现象的分析方法，对由实验结果得到的一些随流体流速变化的无量纲参数进行了详细的估算。为适应多相流体流动研究的需要，本文的研究成果如下：1。用于气液两相流动测量的分子标记测速仪的研制为了防止带电示踪粒子的干扰，将分子标记技术应用到粒子图像测速中。分子标记程序是由时间分辨率为10纳秒的图像捕获设备和可见磷光时间持续几毫秒量级的双乙酰分子示踪剂开发的。这使得我们能够测量电液动力诱导的气液两相流速度。气液电流体力学中的导电力和介电力分析根据上述实验结果，对导电力和介电力进行了分析，以求出所提出的气液电流体动力学的无量纲参数。这使得我们能够对电流体动力学诱导的多相流现象进行定量的分析。研究了这种现象在液体泵上的应用，并对新型非侵入式两相电液泵进行了研究。通过流体流量测量和无量纲参数对泵的性能进行了实验和分析评价。定量表征了电动流体动力效应对泵浦性能的影响。

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.