基于CFD的气流式皮清机内部流场

利用基于CFD(computational fluid dynamics)的数值分析方式,对进口风速、排杂槽口宽度等参数改变引起的气流式皮清机内部速度场和压力场变化进行了仿真分析.采用速度矢量分析了进口风速的影响:进口风速为15 m/s时最佳,风速过低或者过高都易于引起堵塞;采用了压力云图及压力分布分析了排杂槽口宽度的影响:排杂槽口宽度为20 mm,进口风速为15 m/s时无向外排风现象,且向内补风风速最低,清杂及落棉的综合效果最佳.数值分析结果与试验验证结果相同,表明用CFD数值分析的方式可以为气流式皮清机的运行参数调节提供优化分析.

Internal Flow Field of Flow-Through Air Lint Cleaner Based on CFD

The effects of inlet airflow velocity and notch width on the velocity field and lint cleaner pressure field were simulated using the CFD (computational fluid dynamics). The velocity vector was applied to analyze the effect of inlet airflow velocity. The lint cleaner can run normally with velocity of 15m/s， which is easy blocked at higher and lower velocity. The pressure field contour and pressure distribution analysis were used to study the effect of notch width. Under 20mm notch width and 15m/s inlet airflow， no exhaust air phenomenon in lint cleaner while it has the lowest supplement air velocity， the best cleaning rate and loss lint rate. The CFD simulation results are consist to that of the experiment， indicating that the CFD analysis can optimize the operating parameters for the flow-through air lint cleaner.