T型内螺纹微型管内Taylor流流型变化的数值研究  

Numerical study of Taylor flow regimes change in T-type inner thread micro-tube

作　　者：叶文林 鄢志鹏 张莹[1] 孙金丛 程毅[1] 

机构地区：[1]南昌大学机电工程学院,江西南昌330031

出　　处：《化学工程》2017年第9期45-51,共7页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(11562011);江西省自然科学基金资助项目(20151BAB202002)

摘　　要：为研究含有内螺纹的微通道对气液泰勒流的影响,文中结合VOF多相流模型对微通道内气液两相流进行了数值模拟。主要分析了螺纹对称程度、螺纹高度、螺纹宽度对泰勒流型以及管内压力场的影响。结果表明:螺纹的存在会加强管内扰动,泰勒流在螺纹高度达到一定值时,泰勒气泡发生分裂;泰勒气泡形状变化主要与螺纹高度呈现正相关,与螺纹宽度几乎无关。螺纹会对气泡产生阻碍及导向作用,管内中轴线压力会受到螺纹的影响而呈现周期性波动。In order to study the influence of micro channel with internal thread on the gas-liquid Taylor flow, the numerical simulation of gas-liquid two-phase flow in micro channel is carried out by combining the VOF multiphase flow model. This paper mainly analyzes the influence of the degree of symmetry, the height of thread and the width of thread on the pattern of Taylor flow and the pressure field. The results show that the existence of the screw thread can strengthen the disturbance in the tube, and the Taylor flow is split when the height of thread reaches a certain value; the change of shape shows positive correlation to the height of the thread, and it has little to do with the width of the thread. The thread will has hindering and guiding effect to bubble, pressure at the central axis of the tube will be affected by thread and showed cyclical fluctuations.

关 键 词：微型管 Taylor流 内螺纹 流型 数值模拟 

分 类 号：TQ021.1[化学工程]