Experiment and simulation were used to study the flow fields of a liquid-solid-solid three-phase system in a draft-tube stirred reactor with a six-flat-bladed turbine impeller (BT) and a 45° pitched six-bladed upflow turbine impeller (PBTU45). The computational fluid dynamics (CFD) formulation was based on a 3D Eulerian multi-fluid model along with a renormalization group (RNG) k-ɛ turbulence model, which took into account the inter-phase momentum exchange between different phases. The CFD model was validated using experimental data, and the suspension quality was validated by determining the standard deviation of the solid concentration. Good solid suspension was achieved in flow fields agitated by the BT impeller at low impeller speeds. The draft tube adversely affected solid dispersion at most impeller speeds. In flow fields agitated by the PBTU45 impeller, good solid suspension required a faster impeller speed. The suspension quality with the draft tube was better than that without the draft tube under most operating conditions. The power consumption of the BT or PBTU45 impeller with the draft tube was less than that without the draft tube at most impeller speeds.

通过实验和模拟研究了在具有六平叶轮叶轮（BT）和45°螺距六叶向上流式涡轮机的尾管搅拌反应器中的液固固三相系统的流场叶轮（PBTU45）。计算流体动力学（CFD）公式基于3D欧拉多流体模型以及重归一化组（RNG）k - ɛ湍流模型，其中考虑了不同相之间的相间动量交换。使用实验数据验证了CFD模型，并通过确定固体浓度的标准偏差验证了悬浮液质量。在低叶轮速度下，由BT叶轮搅动的流场中实现了良好的固体悬浮。在大多数叶轮速度下，导流管都会对固体分散产生不利影响。在PBTU45叶轮搅动的流场中，良好的固体悬浮液需要更快的叶轮速度。在大多数操作条件下，使用尾水管的悬挂质量要好于没有尾水管的悬挂质量。在大多数叶轮转速下，带引流管的BT或PBTU45叶轮的功耗要小于不带引流管的BT。