中文摘要：

对比比转速同为ns ＝769的两个轴流式叶轮和斜流式叶轮的水力性能和推进性能，分析其做为泵喷水推进器叶轮的适用性。分析结果表明，就所研究的两个叶轮而言，斜流式叶轮的高效区更宽，当做为泵喷水推进器叶轮使用时，轴流式叶轮的结构更紧凑、最大推力更大、最大推功比也更大。因此轴流式叶轮比斜流式叶轮更适合于用做泵喷水推进器的工作叶轮。

英文摘要：

An axial flow impeller and a mixed flow impeller with the same specific speed of ns=769 are investigated by comparing their hydraulic characteristics and thrust performance to analyze the suitability for using in a water jet propulsion.The results show that the mixed flow impeller studied here has a wider high efficiency zone.Nevertheless, the axial flow impeller has a more compact configuration, higher maximum thrust and higher maximum thrust-power ratio than the mixed flow one.There-fore, the axial flow impeller is more reasonable to be a part of a water jet propulsion.