轴向涡轮结构对干法制备ZrO2陶瓷粉体混合效果的影响  

Effect of axial turbine structure on mixing effect of ZrO ceramic powder prepared by dry method

作　　者：余冬玲 朱祚祥 周贱根 黄佳雯 吴南星 YU Dongling;ZHU Zuoxiang;ZHOU Jiangen;HUANG Jiawen;WU Nanxing(School of Mechanical and Electronic Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333403,China;School of Mechanical and Electronic Engineering,Jingdezhen University,Jingdezhen 333403,China;Jiangxi Ceramic Material Processing Technology Engineering Laboratory,Jingdezhen 333403,China)

机构地区：[1]景德镇陶瓷大学机械电子工程学院,江西景德镇333403 [2]景德镇学院机械电子工程学院,江西景德镇333403 [3]江西省陶瓷材料加工技术工程实验室,江西景德镇333403

出　　处：《粉末冶金工业》2021年第4期35-42,共8页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(51964022);江西省教育厅科学技术研究项目(GJJ191181)。

摘　　要：为探究轴向涡轮结构对干法制备ZrO_(2)陶瓷粉体旋转耦合流场的影响,建立气-固两相流数学模型,采用CFD方法分别建立4种不同的轴向涡轮结构ZrO_(2)旋转耦合室粉体数值模型。分析了ZrO_(2)粉体体积分数云图、速度场云图,探究ZrO_(2)陶瓷粉体旋转耦合流场的混合效果与不同轴向涡轮结构的内在联系,同时搭建干法制备ZrO_(2)粉体实验平台,实验分析粉体微观形貌及粉体球形度,以验证数值仿真的正确性。数值分析表明,轴向开启涡轮结构克服了径向流强、轴向流弱的困难,增强的轴向流更多的分布在旋转耦合室中上部,ZrO_(2)陶瓷粉体均匀性最佳,体积分布为0.7~0.8的粉体所占比例最大,且无明显堆积现象。实验结果表明,开启涡轮结构制备的ZrO_(2)粉体粉体形状较规则,球形度约为0.72。实验结果与仿真结果一致,验证了数值仿真的准确性。In order to investigate the effect of axial turbine structure on the rotating coupled flow field of dry prepared ZrO_(2) ceramic powder, the mathematical model of gas-solid two-phase flow was established, and the powder numerical models of ZrO_(2) rotating coupling chamber with four different axial turbine structures were established by CFD method. The volume fraction nephogram and velocity field nephogram of ZrO_(2) powder were analyzed, and the internal relationship between mixing effect of rotating coupling flow field of ZrO_(2) ceramic powder and different axial turbine structure was explored. At the same time, the experimental platform of dry preparation of ZrO_(2) powder was built, and the micro morphology and sphericity of the powder were analyzed to verify the correctness of the numerical simulation. Numerical analysis shows that the axial opening turbine structure overcomes the difficulties of strong radial flow and weak axial flow, and the enhanced axial flow is more distributed in the upper and middle parts of the rotating coupling chamber. The uniformity of ZrO_(2) ceramic powder is the best, and the proportion of volume distribution is between 0.7-0.8, and there is no obvious accumulation phenomenon. The results show that the shape of ZrO_(2) powder prepared by turning on the turbine structure is regular, and the sphericity is about0.72. The experimental results are consistent with the simulation results, which verifies the accuracy of the numerical simulation.

关 键 词：轴向涡轮结构 ZrO2陶瓷粉体 混合效果 CFD方法 

分 类 号：TQ174.758.11[化学工程—陶瓷工业] TB383.3[化学工程—硅酸盐工业]