中文摘要：

联合的计算液体动力学(CFD ) 人口平衡方程(PBE ) 当模特儿被采用与外部泥浆循环在一个煤气泥浆的内部环反应堆调查水动力学。本地煤气的劫盗和水泡直径的预言的光线的侧面在对相应试验性的数据的好同意。煤气的阶段的时间空间的速度侧面表明气体的向上的运动被减慢，气体的住处时间被延长由向下泥浆的动量。外部泥浆的介绍能极大地在反应堆改进煤气的劫盗分发的一致性，特别在下降试管行动区域。而且，在之间的相互作用向下，泥浆和向上的气体能象好质量和热转移一样导致小水泡尺寸和高界面的区域。上述结果为内部环反应堆建议外部泥浆循环的功能并且将对优化设计有用并且反应堆扩大规模。

英文摘要：

The computational fluid dynamics （CFD）-population balance equations （PBE） coupled model is employed to investigate the hydrodynamics in a gas-slurry internal loop reactor with external slurry circulation. The predicted radial profiles of local gas holdup and bubble diameter are in good agreement with the corresponding experimental data. The spatio-temporal velocity profile of the gas phase reveals that the upward movement of gas is slowed down and the residence time of gas is prolonged by the downward momentum of the slurry, introduction of the external slurry can greatly improve the uniformity of gas holdup distribution in the reactor, especially in the downcomer-tube action region. Moreover, the interaction between the downward slurry and upward gas can lead to small bubble size and high interfacial area as well as good mass and heat transfer. The above results suggest the function of external slurry circulation for the internal loop reactor and would be helpful for optimizing the design and scale up of reactors.