基于CFD研究电场力对陶瓷静电施釉的影响
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摘要
针对陶瓷在施釉过程中,制品表面釉滴分布不均匀的问题,采用欧拉-拉格朗日法构建了在静电场力作用下的DPM模型,并基于CFD软件分析了未加入电压、加入-15 k V,-30 k V电压和-50 k V电压四种情况下陶瓷静电施釉中釉滴的粒径和运动速度分布情况。结果表明:在静电场作用下,可使得喷枪的喷幅变宽、能产生较小、均匀的釉滴粒径,并能提高釉滴的运动速度且分布均匀。其中在施加-30 k V电压条件下釉滴粒径均匀,施釉的效果最好。
In order to solve the inhomogeneity of glaze drip distribution on the ceramic surface in the progress of electrostatic spraying, the Euler-Lagrange method was adopted to establish a DPM model for the action in electrostatic field, then the CFD software was used to analyze the glaze drip diameter distribution and the velocity distribution under unapplied voltage,-15 k V,-30 k V and-50 k V. The Result showed that electrostatic glazing broadened glazing range, produced smaller and well-distributed glaze drip diameters, increased the speed of glaze droplets and made their velocities more uniform. The best glazing performance was achieved with the most evenly distributed glaze drip under the applied voltage of-30 k V.
In order to solve the inhomogeneity of glaze drip distribution on the ceramic surface in the progress of electrostatic spraying, the Euler-Lagrange method was adopted to establish a DPM model for the action in electrostatic field, then the CFD software was used to analyze the glaze drip diameter distribution and the velocity distribution under unapplied voltage,-15 k V,-30 k V and-50 k V. The Result showed that electrostatic glazing broadened glazing range, produced smaller and well-distributed glaze drip diameters, increased the speed of glaze droplets and made their velocities more uniform. The best glazing performance was achieved with the most evenly distributed glaze drip under the applied voltage of-30 k V.
引文
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[3]张军贵,周健儿,李俊,等.颗粒级配对堇青石质陶瓷材料气孔率的影响研究[J].陶瓷学报,2014,35(1):22-25.ZHANG Jungui,et al.Journal of Ceramics,2014,35(1):22-25.
[4]金超花,罗惕乾,邹晓琳.压力旋转喷嘴静电喷雾雾滴粒径分布试验[J].灌溉机械,2007,25(2):45-48.JING Chaohua,et al.Drainage and Irrigation Machinery,2007,25(2):45-48.
[5]YE Q,DOMNICK J,SCHEIBE A,et al.Numerical simulation of electrostatic spray-painting processes in the automotive industry[A]//Proceedings of High Performance Computing in Science and Engineering'04[C].Berlin and Heidelberg:Springer,2005:261-275.
[6]DOMNICK J,SCHEIBE A,YE Q.The simulation of the electrostatic spray painting process with high-speed rotary bell atomizers.Part I:Direct charging[J].Particle&Particle Systems Characterization,2005,22(2):141-150.
[7]CLOUPEAU M,PRUNET-FOCH B.Electrostatic spraying of liquids in cone-jet mode[J].Journal of Electrostatics,1989,22(2):135-159.
[8]DOMNICK J,SCHEIBE A,YE Q.The electrostatic spray painting process with high-speed rotary bell atomizers:influences of operating conditions and target geometries[A]//Proceedings of the Conference on Liquid Atomization and Spray Systems,Sorrento,Italy,2003.
[9]SHAH U,ZHANG C,ZHU J.Comparison of electrostatic fine powder coating and coarse powder coating by numerical simulations[J].Journal of Electrostatics,2006,64(6):345-354.
[10]SHAH U,ZHANG C,ZHU J,et al.Validation of a numerical model for the simulation of an electrostatic powder coating process[J].International Journal of Multiphase Flow,2007,33(5):557-573.
[11]PAUTHENIER M M,MOREAU-HANOT M.La charge des particules sphériques dans un champ ionize[J].Phys.Radium Ser.,1932:73500-613.
[12]贾卫东,李成,王贞涛.高沉积静电喷雾装置试验研究[J].排灌机械工程学报,2012,30(2):244-248.JIA Weidong,et al.Journal of Drainage and Irrigation Machinery Engineering,2012,30(2):244-248.