气吸式播种机吸嘴外形对外流场形态的影响  

Influence of Air-suction Seeder's Nozzle on the Shape of External Flow Field

作　　者：庄森[1] 郑伟伟[1] 覃寿同[1] 张绍林[1] 邓秋超[1] 

机构地区：[1]郑州大学机械工程学院,郑州450001

出　　处：《农机化研究》2010年第3期77-80,共4页Journal of Agricultural Mechanization Research

摘　　要：采用流体仿真的方法在相对负压2 0 kPa的条件下,根据一种合理方法确定仿真计算域后,对圆锥及圆柱外形吸嘴的外流场进行了探讨,得到了圆锥外形吸嘴的外流场形态为球形、圆柱外形吸嘴的外流场形态为圆锥形以及吸嘴正下方较远处有一圆锥形的反向流动区域等结论。In a relatively negative 20kPa, this paper used the method of fluid simulation, based on the computational domain acquired with a reasonable method, discussed the shape of external flow field of cylindrical nozzle and conical nozzle, eventually got these conclusions：the shape of conical nozzle＇s external flow field is spherical;the shape of cylindrical nozzle＇s external flow field is conical; there is a reverse flow region far below nozzle;and so on.

关 键 词：吸嘴外形 外流场 计算域 流体仿真 反向流动 

分 类 号：S233.25[农业科学—农业机械化工程]