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水力机械的局部泥沙磨损与其流道表面局部旋涡二次流中的颗粒运动有着密切的关系。作者分析了稀疏颗粒在简单旋涡流场中的运动规律，探讨了颗粒的物理性质、二次涡流结构及初始条件对颗粒运动特性的影响，从而得到了二次旋涡捕获颗粒的运动学和动力学条件。此外，针对实际二次涡流特征提出了数学模型，并计算了其中颗粒的运动轨迹。图１０参１１。
The local sediment wear of hydraulic machinery is closely related to the particle movement in the local vortex secondary flow on the flow channel surface. The authors analyzed the movement of sparse particles in a simple vortex flow field, discussed the physical properties of the particles, the effects of the secondary vortex structure and the initial conditions on the particle motion characteristics, and obtained kinetics and kinetics of the secondary vortex capture particles condition. In addition, a mathematical model for the actual secondary eddy current characteristics is proposed, and the particle trajectories are calculated. Figure 10 参 参 11.