颗粒增强镁基复合材料流体行为与颗粒分散的数值模拟  

Numerical Simulation of Fluid Behavior and Particle Dispersion of Particle Reinforced Magnesium Matrix Composites

作　　者：郭子义 邓坤坤[1] 聂凯波[1] 王翠菊 刘力 GUO Ziyi;DENG Kunkun;NIE Kaibo;WANG Cuiju;LIU Li(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024;Xingxian Economic Development Zone Aluminum and Magnesium New Materials Research and Development Co.Ltd.,Lüliang 033603)

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]兴县经开区铝镁新材料研发有限公司,吕梁033603

出　　处：《特种铸造及有色合金》2024年第6期781-790,共10页Special Casting & Nonferrous Alloys

基　　金：国家重点研发计划青年科学家资助项目(2021YFB3703300);国家自然科学基金资助项目(52001223,51771128,51771129);中央引导地方科技发展资金资助项目(YDZJSX2021B019)。

摘　　要：采用ANSYS Fluent有限元分析软件模拟了在不同倾角(30°、45°、60°、90°)搅拌桨的作用下,坩埚内部流场的结构及其变化特点。通过建立k-ε湍流模型和Euler-Euler多相流模型分析了坩埚内涡流分布规律,并通过模拟颗粒的分散状况进行验证。结果表明,直叶桨坩埚内部流场流速快,但被桨叶搅拌作用分割为上下两个循环区域(双环型流型),混乱程度低,颗粒的分散效果不佳。斜叶桨表面内旋作用明显,矢量混乱度高,颗粒分散第一阶段的效率高;斜叶桨坩埚内部存在轴向流,可形成一体的循环区域(单环型流型),使得颗粒的流动区域更大,分散效果更好。The simulation of internal flow field and variation characteristics in the crucible was carried out by finite ele⁃ment under action of various agitator angles(30°,45°,60°,90°).The k-εturbulence model and Euler-Euler multi⁃phase flow model were established to analyze the vortex distribution law in the crucible,and dispersion of simulated particle was verified.The results indicate that the flow field in the crucible with straight agitator is fast,which is divided into two circulation regions(double loop flow type)by impeller stirring,and the confusion degree is low,inhibiting the dispersion effect of particles.The internal rotation of oblique agitator surface is obvious with a high vector confusion and efficiency of particle dispersion in the first stage.In addition,there exists axial flow in the crucible with oblique agi⁃tator,which can form an integrated circulation region(single loop flow type),leading to larger flow region of particles and desirable dispersion.

关 键 词：数值模拟 机械搅拌 颗粒增强 流体行为 颗粒分散 

分 类 号：TB331[一般工业技术—材料科学与工程] TG249.26[金属学及工艺—铸造]