方形截面直管道中惯性升力系数的拟合  

Fitting of Inertial Lift Coefficient in Square Section Straight Pipe

作　　者：薛壮壮 王企鲲[1] XUE Zhuangzhuang;WANG Qikun(School of Energy & Power Engineering,University of Shanghai for Science & Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院

出　　处：《轻工机械》2019年第4期8-11,18,共5页Light Industry Machinery

基　　金：国家教育部博士点基金资助项目(20113120120003)

摘　　要：为研究方形截面微通道内悬浮颗粒的惯性聚集现象,利用"运动相对性"原理对方形截面层流直通道中运动颗粒所受惯性升力进行了数值计算。课题组研究了Carlo采用数据拟合方法获得的升力近似表达式的普适性,为了总结不同工况下颗粒所受惯性升力系数的统一表达式,扩大了模型所选用的工况范围,所得的最佳拟合指数与Carlo的数据大致相同。该升力系数表达式适用于位于方形截面中线上的较大粒径的颗粒。In order to study the phenomenon of inertia aggregation of suspended particles in a rectangular cross-section microchannel,the inertia lift force of moving particles in laminar flow passageway was numerically calculated by using the principle of " relativity of motion". At present,scholars generally believe that the inertia lift force is essentially the resultant force between the wall lift force and the shear gradient lift force. The universality of the lift approximate expression obtained by Carlo was studied. In order to summarize the particles under different conditions by the unified expression of the inertial lift coefficient,the scope of the operation condition of the model chosen was expanded,and the best fitting index and Carlo data obtained was roughly same. The lift coefficient is applicable to broader conditions located in the square of the middle line of the cross section of the larger size particles.

关 键 词：微通道 方形截面 惯性聚集 惯性升力 壁面升力 剪切梯度升力 

分 类 号：O35[理学—流体力学]