The effects of curvature and torsion on secondary flow, isoline of stream function and distribution of the axial velocity of flow were discussed.

讨论了曲率和挠度对二次流动、流函数等值线和轴向速度的影响，研究了不同曲率和挠度螺旋管道内流量与压力梯度之间的关系。

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A new hydraulic design method and the numerical method of axial flow pump impeller are introduced. The integral equation for flow calculation of S1 stream surface of impeller is derived.

介绍了一种新的轴流泵叶轮的水力设计方法，推导了求解叶轮s 1流面流动的积分方程。

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