摘要
针对传统基于网格方法不能有效模拟大变形问题的现状，本文引入SPH（Smoothed Particle Hydrodynamic）方法模拟液态钢渣（文中简称液渣）与粒化轮的碰撞过程．因液渣物性参数尚不完善，故以铝液代替并使用SPH方法建模，粒化轮则用FEM（Finite Element Method）建模，并通过接触算法实现FEM．SPH的耦合，研究了粒化轮转速、铝液的流速等因素对碰撞过程铝液液滴体积大小的影响．模拟结果表明：当SPH粒子承载质量为2．04×10-4ks时，粒化轮转速达到900rad／min；粒化前铝液流速为1m／s时粒化效果较好且体积多分布在1330～1930mm3；碰撞后粒子运动速度多集中在5～25m／s．
The SPH method is introduced to simulate the collision process between granulating wheel and：motten steel slag because the traditional method based on grid cannot effectively solve the large deformation problems. The molten steel slag was replaced by aluminum liquid since some of the physical parameters of molten steel slag are unclear so far. SPH method was adopted to simulate the granulating process of the aluminum liquid as well as the FEM was used to simulate the granulating wheel. Meanwhile, coupling the SPH method with FEM was realized by means of the＂ contacting algorithm＂. The effects of the granulating wheel speed and the velocity of aluminum liquid on the particle ：size of aluminum droplet during the collision process were investigated. The simulation results indicate that the optimal granulating wheel speed and the aluminum liquid velocity are 900 rad/min and 1 m/s when the SPH particles bear the quality of 2.04 × 10 -4 kg, respectively. Under this condition, the single particle volume of most aluminum droplets is in the range of 1 330 - 1 930 mm3 when the particle speed after collision process is between 5 - 25 m/s.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2013年第5期1-7,共7页
Materials Science and Technology
基金
国家自然科学基金资助项目(51034008
51004012)
中国博士后科学基金项目(20100480202)
中央高校基本科研业务费专项资金资助(FRF-TP-12-026A)
关键词
铝液粒化
SPH
FEM
接触算法
数值模拟
aluminum liquid granulation
SPH
FEM
contacting algorithm
numerical simulation
作者简介
作者简介：徐啸雄（1988－），男，硕士研究生；
苍大强（1949－），男，教授，博士生导师
通信作者：刘晓明，E-mail：liuxm@ustb．edu．cn．
