在运行过程中,混流式水轮机尾水管浪涌所引发的高负荷不稳定性可能会导致其运行范围受限。虽然有一些缓解措施,但当设计有可能发生变化时,还是期望能在设计阶段确定不稳定性风险。深入分析了水力系统的建模,包括满负荷涡流,讨论了当今最通用模型存在的不足。描述了模型的修正过程,给出了许多真实结果。最近,改进后的模型已在一修复工程中得到了成功应用。 During operation, high load instability caused by the wake of the draft tube of the Francis turbine may result in limited operating range. Although there are some mitigations, it is expected that the risk of instability will be identified during the design phase as design changes are likely to occur. In-depth analysis of the hydraulic system modeling, including full-load eddy current, discussed the most common shortcomings of today’s model. Described the model of the correction process, gives a lot of real results. Recently, the improved model has been successfully applied in a restoration project.