摘要
气-液-液三相流中气泡运动引起的输运行为是影响其工业应用效果的关键因素之一。首先,基于三元相场方法构建了一套三相流系统仿真模型,重现了气泡穿越液-液界面的现象,并将其用于研究气泡直径、界面张力和流体属性对输运规律的影响;然后,开展了数值正交试验和回归分析,研究了各物性参数与气泡夹带体积之间的近似关联关系及其灵敏度;最后,研究了工业常用连续气泡系统的上升特性。结果表明:气泡直径、轻流体密度和流体黏度是夹带体积的强影响因素,而界面张力和重流体密度是弱影响因素;基于此实现了夹带体积的快速预测,相对误差基本在10%以内。研究还发现,稳定夹带体积与鼓气速度之间呈二次关系,而最大夹带体积在低鼓气速度时呈二次关系,在高鼓气速度时呈线性关系,各拟合曲线的拟合优度均超过0.998,该结果为进一步的工艺优化提供了量化依据。
The transport behavior induced by bubble motion in gas-liquid-liquid three-phase flow is one of the key factors affecting the effectiveness of its industrial application.A simulation model of the three-phase flow system was developed based on the ternary phase field method to reproduce the phenomenon of bubbles crossing the liquid-liquid interface,which was used to investigate the effects of bubble diameter,interfacial tension and fluid properties on the transport laws.Thereafter,numerical orthogonal tests and regression analyses were carried out to obtain the approximate correlations between each physical property parameter and the bubble entrainment volume and their sensitivities.The results show that bubble diameter,light fluid density and fluid viscosity are major factors influen-cing the entrainment volume,while interfacial tension and heavy fluid density are minor factors.Accordingly,a fast prediction of entrainment volume is realized,and the relative error is basically within 10%.In addition,based on the investigation of the rise characteristics of continuous bubble systems commonly used in industry,the stable entrainment volume is quadratically related to the blowing speed,while the maximum entrainment volume is quadratically related at low blowing speeds and linearly related at high blowing speeds,and the goodness-of-fit of each fitted curve is more than 0.998,which provides a quantitative basis for further process optimization.
作者
吴凯
WU Kai(Shaanxi Police College,Taiyuan 030401,China)
出处
《海军工程大学学报》
北大核心
2025年第6期56-65,共10页
Journal of Naval University of Engineering
基金
山西省青年科学研究基金资助项目(202403021212294)。
关键词
三元相场方法
多相流
液-液界面
输运规律
ternary phase field method
multiphase flow
liquid-liquid interface
transport laws
