CAJ | 학술논문

油水两相流在管道中流动时会形成多种流型，其中一相形成液滴分散到另一相中是常见的流型之一，液滴粒径及其分布会影响油水两相流的流动特性，因此液滴的形成是研究油水两相流的基础。本文研究了两种白油和水在内径25.4 mm的不锈钢管道内形成的油水两相分散流，通过高速摄像系统拍摄等动量取样装置上有机玻璃样槽中流动状态下的分散流来获取液滴的图像，捕捉有代表性的过程。研究发现，液滴形成过程中剪切破碎和碰撞聚结现象同时发生，并最终达到动态平衡，宏观表现为两相流系统流动参数达到稳定，得到了液滴剪切破碎、碰撞聚结和形成稳定液滴的时间以及各过程中的液滴特性和泵对形成稳定液滴时间的影响。实验结果表明，泵的存在对油水两相分散流的特性有较大影响。
유수량상류재관도중류동시회형성다충류형，기중일상형성액적분산도령일상중시상견적류형지일，액적립경급기분포회영향유수량상류적류동특성，인차액적적형성시연구유수량상류적기출。본문연구료량충백유화수재내경25.4 mm적불수강관도내형성적유수량상분산류，통과고속섭상계통박섭등동량취양장치상유궤파리양조중류동상태하적분산류래획취액적적도상，포착유대표성적과정。연구발현，액적형성과정중전절파쇄화팽당취결현상동시발생，병최종체도동태평형，굉관표현위량상류계통류동삼수체도은정，득도료액적전절파쇄、팽당취결화형성은정액적적시간이급각과정중적액적특성화빙대형성은정액적시간적영향。실험결과표명，빙적존재대유수량상분산류적특성유교대영향。
One of the most common oil-water flow patterns in a pipeline is dispersion flow formed by one phase dispersed into another in the form of droplets. The flow characteristics of oil-water dispersion are affected by the sizes and distribution of the droplets,thus the study on droplet formation is the basis in oil-water dispersion flow research. This paper studied oil-water dispersion flows formed by two different mineral oils and tap water in a 25.4mm nominal bore stainless pipeline. The droplet pictures were obtained using a high speed video recording technique in an isokinetic sampling system. The results showed that the breaking up and coalescence of droplets occurred at the same time until a dynamic balance was obtained with the dispersed flow parameters achieving a stable state. The time and characteristics of droplets breaking up,coalescence and forming a stable state were obtained,as well as the influence of pump on the time of stable flow formation. The results showed that pump had a strong influence on the characteristics of oil-water dispersion flows.