基于界面追踪法的受限通道内气泡运移特性研究  

Study on Migration Characteristics of Bubbles in Confined Channels based on Front-tracking Method

作　　者：姚斡维 郑学波 YAO Guanwei;ZHENG Xuebo(School of Power and Energy,Northwestern Polytechnical University,Xi′an,China,710129;School of Energy and Electrical Engineering,Chang′an University,Xi′an,China,710018)

机构地区：[1]西北工业大学动力与能源学院,陕西西安710129 [2]长安大学能源与电气工程学院,陕西西安710018

出　　处：《热能动力工程》2024年第6期113-122,共10页Journal of Engineering for Thermal Energy and Power

基　　金：陕西省自然科学基础研究计划资助项目(2023-JC-YB-305)。

摘　　要：气泡的生成和运动是影响工业设备安全运行及其能源传递效率的重要因素。本文基于界面追踪法(Fronttracking Method)研究气泡在受限通道内的运移特性,通过改变障碍物数量、尺寸及布置方式,获得通道结构对流场及气泡运动的影响规律。研究表明:减少障碍物数量,对称式布置时气泡峰值合速度降低5%,交错式布置时气泡峰值合速度增大193%;增大障碍物尺寸,流场所受扰动逐渐增强,气泡轨迹摆动幅度增大;障碍物对称式布置时,中等尺寸下气泡轨迹摆动最明显;双气泡前后布置时,上游气泡对流场的扰动会阻碍下游气泡前进,气泡的峰值合速度比并排布置时增大22.6%。The formation and movement of bubbles greatly affects the safe operation of industrial equipment and its energy transfer efficiency.Migration characteristics of bubbles passing through confined channels were studied based on front-tracking method.The effect of channel structure on the flow field and bubble motion was investigated by changing the quantity,size and arrangement of the obstructions.The results show that decreasing the number of obstructions,the peak velocity of the bubble decreases by 5%in the case of symmetric layout,and increases by 193%in the case of staggered layout.Increasing the size of obstructions,the flow field becomes more disturbed,and the oscillation amplitude of the bubble trajectory increases.The bubble of medium size oscillates the most for symmetric layout.As for two bubbles in front-behind layout,disturbance in flow field caused by the upstream bubble hinders the downstream bubble.The peak velocity in front-behind layout increases by 22.6%compared to that in the side-by-side layout.

关 键 词：计算流体动力学 直接数值模拟 界面追踪法 气泡运动 界面形态 

分 类 号：TB126[理学—工程力学] TB115[理学—力学]