载流过程的流体力学描述

HYDRODYNAMIC BEHAVIOR OF CONVEYING PROCESS

本文根据两相流体力学的基本原理,提出了描述载流过程的数学模型.通过对内径为90mm,载流管高度5.7m的载流床轴向压降的测定、计算和实测的拟合,获得了模型主要参数—曳力系数的经验方程式.在此基础上,定量计算了颗粒性质、操作条件对床层空隙度、床压降的影响.

According to two-phase hydrodynamic theory, a mathematical model is suggested for describing the dilute-phase conveying process. The pressure drop profiles along axial distance of a conveying bed (I. D 90mm, effective height 5.7m) is measured. By using the data fitting method, an empiuical equation is obtained for calculating the drag coefficient which is a main parameter of the model. Based on the above results, the effect of particle properties and operating conditions on bed voidage and pressure drop are calculated.