ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

In view of the loss of maize cleaned out of maize harvester, models of maize mixture were founded by using EDEM software. Computational fluid dynamics and discrete element method (CFDDEM) were coupled to simulate the motion of maize in cross airandscreen cleaning device. The distribution of airflow and the trajectories and velocities of maize moving in the device were obtained, which reveal the work mechanism of the device. The results also showed that the debris of maize only included maize cob and main concentrated in the middle and at the rear of the device. And the performance of the device cleaning debris was enhanced with rises of inlet airflow velocities in the device, but the loss of maize was increased. The experimental results and simulation results consisted well. In order to meet the performance requirement of maize harvester, the loss rate of maize should be lower than 2%, the inlet velocity of airflow was ascertained and should be lower than 11.72m/s under the condition of the normal feed quantity of maize mixture of 3kg/s. Based on this, the rotating speed of the cross fan in maize harvester should be lower than 911r/min.