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| Effect of axial turbine structure on mixing effect of ZrO2 ceramic powder
prepared by dry method |
| YU Dongling1，3，ZHU Zuoxiang1，3，ZHOU Jiangen1，3，HUANG Jiawen2，3，WU Nanxing1，3 |
| 1School of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China;
2School of Mechanical and Electronic Engineering, Jingdezhen University, Jingdezhen 333403, China;
3Jiangxi Ceramic Material Processing Technology Engineering Laboratory, Jingdezhen 333403, China |
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Abstract In order to investigate the effect of axial turbine structure on the rotating coupled flow field of dry prepared
ZrO2 ceramic powder, the mathematical model of gas-solid two-phase flow was established, and the powder
numerical models of ZrO2 rotating coupling chamber with four different axial turbine structures were established
by CFD method. The volume fraction nephogram and velocity field nephogram of ZrO2 powder were analyzed, and
the internal relationship between mixing effect of rotating coupling flow field of ZrO2 ceramic powder and different
axial turbine structure was explored. At the same time, the experimental platform of dry preparation of ZrO2
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 ZrO2 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 ZrO2 powder prepared by turning on the turbine structure is regular, and the sphericity is
about 0.72. The experimental results are consistent with the simulation results, which verifies the accuracy of the
numerical simulation.
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Received: 15 June 2020
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Corresponding Authors:
吴南星（1968—），男，博士，教授，主要研究方向为高性能陶瓷技术装备、粉末烧结技术。
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2021, Vol. 31 
