Xu Zheng ¹‚Gai Guosheng ²‚L u Shouci ¹

（1∙Beijing University of Science and Technology‚Beijing100083；

2．Tsinghua University‚Beijing100084China）

Abstract

The simulation of flow field between various blade length by Phoenics software shows that the longer the blade is‚the more laminal the flow field is‚the more beneficial to classification．So the increase in blade length can improve the classification of classifier．T he simulation is proved to be correct by the theoretic analysis on the results．

Keywords：classification of super－fine powder；air classifier；numerical simulation；flow field

DOI：10.13732/j.issn.1008-5548.1999.06.003