本文通过输粉系统一些元件的模化试验,提出了纯空气与输粉时水平管道、垂直管道、90°弯管及U型组合弯管等的阻力特性与浓度修正系数;阐述了输粉管道中浓度对速度场与边界层的影响,以及边界层中的流动状态对流体阻力所起的重要的,有时甚至是决定性的作用。根据试验中获得的水 In this paper, the drag characteristics and concentration correction factors of horizontal pipes, vertical pipes, 90 ° elbow pipe and U-shaped elbow pipe when pure air and powder are fed are put forward based on the mold test of some components of the powder feeding system. The effect of medium concentrations on the velocity field and the boundary layer, and the important, and sometimes even decisive, contribution of the flow regime in the boundary layer to the fluid resistance. Based on the water obtained in the experiment