基于CFD-DEM耦合的揉丝机排料装置内物料运动模拟与试验
发布时间：2018-08-05 16:29
【摘要】：为解决传统物理方法难以对揉丝机排料装置内物料运动进行可视化研究的问题,基于CFD-DEM气固耦合法,采用RNG K-ε湍流模型及Euler-Lagrange耦合算法对揉丝机不同主轴转速下排料装置内物料运动过程、内流道气流速度分布、气流对物料的耦合力分布进行了数值模拟,并对风扇主轴转速3 000r/min时物料运动过程进行分区域研究。结果表明:在风扇主轴额定转速3 200r/min范围内,主轴转速2 000、2 500和3 000r/min在模拟结束时分别排出物料数量为6 191、6 669和7 161个;不同区域内物料平均速度形成梯度分布,由大到小依次为物料出口区域(10.00m/s)、风扇转动区域(6.00m/s)、物料入口区域(0.87m/s);风扇转动区域气流速度最大(峰值50.00m/s),对物料耦合力作用最强,物料入口区域则耦合力最小;物料在入口区域内数量最多并在模拟结束时发生少量堆积,在出口区域未见回流现象发生。对模拟结果进行了试验验证,结果表明利用CFD-DEM气固耦合法对揉丝机排料装置内物料运动进行可视化研究是可行的。
[Abstract]:In order to solve the problem that it is difficult for traditional physical methods to visualize the movement of materials in the discharging device of kneading machine, the gas-solid coupling method based on CFD-DEM is used to solve the problem. RNG K- 蔚 turbulence model and Euler-Lagrange coupling algorithm are used to simulate the material movement, velocity distribution and coupling force distribution at different spindle speeds. The material movement process of fan spindle at 3 000r/min was studied in different regions. The results show that in the range of 3 200r/min rated speed of the fan spindle, the quantity of materials discharged at the end of the simulation is 6191 / 2669 and 7.161 respectively at the end of the simulation, and the average velocity of the materials in different regions forms a gradient distribution. The order from big to small is material outlet region (10.00m/s), fan rotation area (6.00m/s), material inlet area (0.87m/s), fan rotation region has the largest airflow velocity (peak 50.00m/s), and has the strongest effect on material coupling force, while the material inlet area has the smallest coupling force. The material quantity is the most in the entrance area and a small amount of accumulation occurs at the end of the simulation, but no reflux occurs in the exit area. The experimental results show that it is feasible to use CFD-DEM gas-solid coupling method to visualize the movement of materials in the discharging device of the kneading machine.
【作者单位】： 甘肃农业大学工学院;中国农业大学工学院;
【基金】：国家“十二五”科技支撑计划项目(2012BAD14B10)
【分类号】：S817.12
，
本文编号：2166347
[Abstract]:In order to solve the problem that it is difficult for traditional physical methods to visualize the movement of materials in the discharging device of kneading machine, the gas-solid coupling method based on CFD-DEM is used to solve the problem. RNG K- 蔚 turbulence model and Euler-Lagrange coupling algorithm are used to simulate the material movement, velocity distribution and coupling force distribution at different spindle speeds. The material movement process of fan spindle at 3 000r/min was studied in different regions. The results show that in the range of 3 200r/min rated speed of the fan spindle, the quantity of materials discharged at the end of the simulation is 6191 / 2669 and 7.161 respectively at the end of the simulation, and the average velocity of the materials in different regions forms a gradient distribution. The order from big to small is material outlet region (10.00m/s), fan rotation area (6.00m/s), material inlet area (0.87m/s), fan rotation region has the largest airflow velocity (peak 50.00m/s), and has the strongest effect on material coupling force, while the material inlet area has the smallest coupling force. The material quantity is the most in the entrance area and a small amount of accumulation occurs at the end of the simulation, but no reflux occurs in the exit area. The experimental results show that it is feasible to use CFD-DEM gas-solid coupling method to visualize the movement of materials in the discharging device of the kneading machine.
【作者单位】： 甘肃农业大学工学院;中国农业大学工学院;
【基金】：国家“十二五”科技支撑计划项目(2012BAD14B10)
【分类号】：S817.12
，
本文编号：2166347
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