摘要
为柱面笼型粉体分级机的导向叶片角度会对分级机内速度和压强产生影响,直接影响了分级机的性能。为了研究不同角度的导向叶片对柱面笼型粉体分级机流场的影响,设计了3种不同角度的导向叶片来进行对比研究,利用计算流体动力学对柱面笼型粉体分级机内部流场特性进行数值模拟.。模拟结果表明导向叶片角度变小后虽然可以使速度增加,但破坏了流场的稳定性;角度增大,则会减小分级区域的速度.通过对计算数据的分析,发现分级机存在一个最优导向叶片角度,此时分级机内流场最为稳定,分级性能最佳。
The angle of guide vane in cylindrical cage powder classifier will affect velocity and pressure; it directly offects the performance of the classifier. To research guide vanes＇ influences on flow fields of cylinder cage powder classifier at different angles, comparisons of guide vanes at 3 different angles are therefore undertaken examining air flow behavior. The investigation of these flow field characteristics makes use of the computational fluid dynamics （CFD） to simulate the airflow in the classifier. It is found that smaller angles of guide vanes can increase velocity but damage the stability of flow fields , and that those larger angles will reduce the velocity. Through the analysis of the data of calculation,it is found that clcassifier has a optimal angle of the guide vane, when angle of the guide vane is critical, the flow filed in the classifier is the best. It has the best classification performance.
出处
《机械设计与制造》
北大核心
2013年第9期169-171,共3页
Machinery Design & Manufacture
基金
江苏省新型环保重点实验室开放项目(AE201033)
关键词
柱面笼型粉体分级机
导向叶片
数值模拟
Cylinder Cage Powder Classifier
Guide Blades
Numerical Simulation
