安装 Kaplan水轮机的低水头水电站 ,轴向水推力是一个重要的设计和安全运行指标。为精确计算过渡过程的轴向水推力 ,除用叉管理论以分节集中模拟蜗壳圆周分流的方法 ,以计及蜗壳的影响来提高过渡过程计算精度外 ,还利用螺旋桨理论 ,对过渡过程机组桨叶划水产生的轴向水推力进行模拟计算。讨论了各种因素对轴向水推力的影响 ,包括各项推力系数的选取和修正。计算结果接近目前的实测资料 ,说明此计算模型是简单、合理、有效的 Axial water thrust is an important design and safety indicator for low-head hydropower stations with Kaplan turbines. In order to accurately calculate the axial water thrust of the transient process, in addition to using the fork tube theory to simulate the circumferentially shunts of the volute in a section, the calculation accuracy of the transition process is also taken into account in consideration of the influence of the volute. In addition, propeller theory is applied to the transition The axial water thrust generated by the paddle paddle padding of the process unit is simulated. The influences of various factors on axial water thrust are discussed, including the selection and correction of various thrust coefficients. The calculation results are close to the current measured data, indicating that this calculation model is simple, reasonable and effective