Based on this, the effect of downcomer diameter and height in the reactor were investigated, liquid circulating velocity and gas hold-up in the riser increased with draft-tube diameter.

• 在此基础上，使用计算流体力学模拟的方法考查了反应器内的导流筒直径和导流筒高度对反应器内两相流动的影响，导流筒直径增大，液相循环量增大，上升段气含率增大；