FCC沉降器全部空间三维流场的数值模拟

 用数值模拟方法模拟了一种典型FCC沉降器内的紊流过程。采用Fluent软件首先计算了一个旋风分离器中的流场，并与实验数据进行了对比，验证了所采用的模型和计算方法，随后对整个沉降器进行计算。在计算过程中没有对沉降器的复杂结构进行简化，所建立的几何模型包括沉降器内部区域和两级旋风分离系统内部区域的全部流动空间，计算结果给出了沉降器所有空间内的流动细节。采用Reynolds应力输运模型对紊流进行处理，可以较好地吻合湍流的各向异性效应。

NUMERICAL SIMULATION OF 3D TURBULENT FLOW IN AN FCC DISENGAGER

The numerical simulation of turbulent flow in a FCC disengager was carried out. The Fluent software was used to firstly calculate the turbulent flow in a cyclone, and the comparison between the simulation results and the experimental data was conducted to verify the used models and calculation methods. Then, the turbulent flow in a FCC disengager was numerically calculated. During the calculation process there was no any geometric simplification for the complicated structure of FCC disengager. The modelling domain included all spaces of the disengager: the space inside the two stage separators and the space outside the separators in the disengager. The details of the turbulence flow in all spaces of whole disengager were obtained. The Reynolds stress transport turbulence model was used to treat the turbulence, the results of which agreed with the situation of anisotropic effect of the turbulence.