摘要
利用浆料直写技术对SiO_(2)粉末进行成型时,将受到诸多因素的影响,其中颗粒大小即为其中重要因素之一。利用不同颗粒大小SiO_(2)粉末制备对应的陶瓷浆体,针对流变实验中浆体呈现的典型非牛顿特征,提出一种修正格子Boltzmann方法(LBM)对浆体在挤出机中的流动进行分析,从流体力学角度探究颗粒大小对浆体流动性的影响,结果表明不同颗粒大小导致了流线中心位置及流速大小的差异,较小粒径的陶瓷粉末将有助于浆体的流动。对于不同颗粒大小制成的浆体,其在挤出机中的流动均主要集中在中部位置,在后期设计挤出机结构时可考虑增加螺距,增大有效流动区域。
When using direct ink writing(DIW)technology to shape SiO_(2) powders,it will be affected by many factors,among which the particle size is one of the important factors.Different particle sizes of SiO_(2) powders were used to prepare the ceramic slurry,then a modified lattice Boltzmann method(LBM)was proposed to analyze the flow of slurry in extruder according to the typical non-Newtonian rheological characteristics.The effect of the particle size on the flowability of the slurry was explored from the perspective of hydrodynamics.The results show that different particle sizes lead to the diverse location of the streamline center and the velocity of the flow,and the smaller size of ceramic powder will contribute to the better flow of slurry.For each case,the flow in the extruder is mainly concentrated in the middle position.In the later design of the extruder,increasing the pitch can be considered which can widen the effective flow area.
作者
张捷
顾海
姜杰
孙健华
ZHANG Jie;GU Hai;JIANG Jie;SUN Jian-hua(School of Mechanical Engineering,Nantong Institute of Technology,Jiangsu Nantong 226002,China;Jiangsu Key Laboratory of 3D Printing Equipment and Application Technology,Jiangsu Nantong 226002,China)
出处
《机械设计与制造》
北大核心
2022年第11期106-110,共5页
Machinery Design & Manufacture
基金
江苏省重点建设学科资助项目(苏教研[2016]9号)
江苏省高校品牌专业建设工程资助项目(PPZY2015C251)
江苏省高等学校自然科学研究重大项目(18KJA460006)
江苏省科技计划项目(BE2018010-4)
南通市科技计划项目(JC2018144、JCZ19122)。
