采用CFD方法对折流式旋转床气液两相流动及压降进行数值模拟，建立了二维物理模型，研究了折流式旋转床转速、动静圈对数、进气量对气相压降和气相流场的影响，并用实验数据对模型进行验证. 结果表明，计算与实验相对误差在15%以内. 气相压降随进气量和动静圈对数增加而显著增大；转速增加，压降增大，但不明显，压降主要集中在转子内部，占总压降的88%~97%，其中转子压降的55%~73%由拐弯处的摩擦阻力引起；气体在静圈下隙存在回流，在动圈上隙气体流动缓慢，存在流动死区，气速主要以切向速度为主(占80%以上)，峰值位于转子外缘，并与气体入口存在较大速度梯度，径向和轴向速度所占比例较小，且因位置不同而不同. 速度变化和压降的变化是转速、进气量和动静圈数等共同作用的结果.

The gas-fluid two-phase flow field and gas pressure drop in a rotating zigzag bed were simulated with computational fluid dynamics (CFD). A 2-D physical model was set up. The effects of rotational speed, number of baffles and gas flow rate on gas pressure drop and flow field were studied. The CFD model was validated by experimental results. The results show that the averaged relative error between experiments and calculation is less than 15%. The gas pressure drop obviously increases with increasing of the number of baffles and gas flow rate. The pressure drop also increases with increasing of the rotational speed, but not obviously. The pressure drop mainly exists in the interior of rotor, being 88%~97% of the total pressure drop, and 55%~73% of the rotor pressure drop is caused by the friction around the corner. There are backflow in the lower gaps of static baffles and dead zone in the upper gaps of rotating baffles, and 80% of the total velocity is tangential velocity which has peak value at the outer edge of rotor. The tangential velocity at rotor is greater than that at gas inlet. The radial velocity and axial velocity are different at different locations. The gas velocity change and pressure drop are caused by the rotational speed, number of baffles and gas flow rate.