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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 CFD method was used to simulate the gas-liquid two-phase flow and pressure drop in a baffled rotary bed. A two-dimensional physical model was established. The relationship between the rotating speed and logarithm of the moving baffle was studied. And the experimental data are used to verify the model.The results show that the relative error between calculation and experiment is less than 15% .The gas pressure drop increases with the increase of air intake and the logarithm of the dynamic and static air flow rate, Large, but not obvious, the pressure drop is mainly concentrated in the rotor, which accounts for 88% -97% of the total pressure drop, of which 55% -73% of the rotor pressure drop is caused by the frictional resistance at the turning point. The gas flow velocity is mainly in the tangential direction (accounting for more than 80%). The peak is located at the outer edge of the rotor and has a large velocity gradient with the gas inlet. The radial And the proportion of axial velocity is small, and because of different locations and changes in speed and pressure drop is the speed, intake air and the number of dynamic and static results and so on.