Stream parameters have a great effect on grain cleaning.During harvest, the stream parameters should be adjusted according to the threshed grains, mainly adjusting the direction and speed of the wind.

• 摘要气流参数对清粮效果影响极大，收获作业时常常需要根据脱出物的状况对气流参数进行调节，主要调节参数是气流的方向和气流速度。