Abstract: The thrust coefficient of different hydrofoil impellers was experimentally studied and simulated with CFD. Results showed that the thrust coefficient of four-broad-blade hydrofoil A is the largest，and that of three-narrow-blade hydrofoil D is the smallest. The simulation results are in good agreement with experiment. Compared with other axial impellers，four-broad-blade hydrofoil A produces a fully developed circulation. The maximum axial velocity of four-broad-blade hydrofoil A is the biggest in these impellers at the vertical line of blade tip. The maximum axial velocity of four-broad-blade hydrofoil A gradually declines with the increase of r/R，and moves toward the bottom of the tank. Experimental results in water system indicated that the mass transfer coefficient（kLa）of four-broad-blade hydrofoil A-Rushton turbine（HF-A -RT）is 9.6% higher than that of Rushton turbine-Rushton turbine（RT-RT）when gas aerated rate is 1.1 vvm and the power consumption per volume（P/V）is not less than 1.5 kW/m3.

摘要： 对几种不同型式轴流桨的推力系数进行了实验及CFD模拟研究。结果表明：四宽叶翼型桨A的推力系数最大，三窄叶翼型桨D推力系数最小；模拟结果与实验结果有很好的吻合；四宽叶翼型桨A较其它几种轴流桨形成的全釜大循环更为彻底，没有发生分区现象；四宽叶翼型桨A在叶端线上的最大轴向速度远大于其它4种桨；四宽叶翼型桨A最大轴向速度随着r/R的增大而逐渐减小且逐渐向釜底方向移动。在水体系中的实验结果表明：当通气量Qg为1.1 vvm ，P/V≥1.5 kW/m3时，四宽叶翼型桨A-透平桨组合的传质系数较双层透平桨组合高约9.6%。