含水老化油暴沸机理  

Bumping mechanism of aging oils

作　　者：陈洪涛[1] 梁宏宝[1] 莫瑞[2] 朱砂[1] 杨智平[3] 

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]东北石油大学化学化工学院,黑龙江大庆163318 [3]东北石油大学石油工程学院,黑龙江大庆163318

出　　处：《化工学报》2015年第12期4823-4828,共6页CIESC Journal

基　　金：黑龙江省教育厅科学技术研究项目(12531071)~~

摘　　要：实验室内建立可视化沸腾容器,用高速摄像机记录单个气泡的生成、成长、脱离、上升的过程,并建立相关数学模型,研究气泡行为与老化油暴沸之间的关系。研究表明,随着'驱动力'ΔTs(即过热度)逐渐增大,传热面上水开始汽化沸腾,形成油包蒸汽气泡,气泡的跃离时间随热通量的增加而缩短,而传热面上的汽化核心密度增加;'驱动力'继续增大,气泡的破灭速度低于生成速度时,形成气泡层,大量的气泡累积会使气泡层迅速扩增到整个容器空间,形成暴沸。This paper focuses on the relationship between bubble behavior and bumping of aging oil. A visualization boiling vessel is built and relevant mathematical model is established according to the generation, growth, departure and rising of single bubbles, recorded by a high-speed camera. Results show that, with the increase of driving force ΔTs（degree of superheating）, the water on the heat transfer surface boils, forming vapor-in-oil bubbles. The departure time of bubbles decreases with the increase of heat flux, while the density of nucleation sites on the heat transfer surface increases. As ΔTs increases continuously, a bubble layer forms when the rupturing rate of bubble is lower than their producing rate. Accumulation of a large number of bubbles will make the bubble layer amplify to the entire container space rapidly to form bumping.

关 键 词：老化油 暴沸机理 气泡 热通量 汽化核心密度 

分 类 号：TE992.4[石油与天然气工程—石油机械设备]