摘要
立式捏合机作为固体火箭推进剂制备的核心装备,其通过桨叶的快速旋转实现原料颗粒的均匀混合。采用离散元方法构建了捏合机混合过程数值模型,通过颗粒集合体构建桨叶几何模型,避免了传统动网格技术导致的高额计算成本的同时,保证了计算准确性。在此基础上模拟了公转转速60 r/min、120 r/min、180 r/min三种工况条件下的颗粒混合与碰撞行为。模拟结果表明:行星式搅拌桨可实现快速均匀混合,各高度层平均颗粒直径在30 s后基本趋于稳定;桨叶转速与颗粒所受碰撞力成正比,桨叶附近区域颗粒所受碰撞力较高,且颗粒直径越大,其所受碰撞力越强。
The vertical kneader,serving as the core equipment for the preparation of solid rocket propellants,achieves uniform mixing of raw material particles through the rapid rotation of blades.A numerical model for the mixing process of the kneader was constructed using the discrete element method.The geometric model of the blades was established via particle aggregates,which not only avoids the high computational costs caused by traditional dynamic mesh technology but also ensures computational accuracy.On this basis,the particle mixing and collision behaviors under three operating conditions with revolution speeds of 60 r/min,120 r/min,180 r/min were simulated.The simulation results indicate that the planetary stirring blades can achieve rapid and uniform mixing,and the average particle diameter of each height layer basically stabilizes after 30 s.The rotational speed of the blades is proportional to the collision force experienced by particles.Particles in the area near the blades are subjected to higher collision forces,and the larger the particle diameter,the stronger the collision force it undergoes.
作者
杜少华
赵一鸣
陈德洋
胡婧宇
郭翔
周强
Du Shaohua;Zhao Yiming;Chen Deyang;Hu Jingyu;Guo Xiang;Zhou Qiang(School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,China;National Key Laboratory of Aerospace Chemical Power,Xiangyang 441003,China)
出处
《当代化工研究》
2025年第15期52-54,共3页
Modern Chemical Research
关键词
离散元方法
立式捏合机
颗粒
桨叶
discrete element method
vertical kneader
particle
blades
作者简介
杜少华(1992-),男,汉族,陕西岐山人,博士,副教授,研究方向:气固多相反应流动仿真;通信作者:周强(1982-),男,汉族,山东济宁人,博士,教授,研究方向:多相反应流动数字孪生。
