关于混流式水轮机稳定性的几点新认识

根据收集国内外混流式水轮机稳定性资料，特别是根据实际的模型试验观测和电站调查结果，注意到运行工况、空化及涡带特征对稳定性的影响。在此基础上，分析了他们之间的相互关系，总结出一些统计规律，提出了一个涡带锥角的新概念以表征水轮机的稳定性，最后，对水轮机的模型研究、模型试验、真机选型提出了建议。

Some New Views on Francis Turbine Stability

On the basis of a large amount of documents about Francis turbine stability in the world, and especially according to the recent model test results and field investigation results of power station , the affects of the operation condition (head and output range) , the cavitation and the vortex character have been taken into consideration for the turbine stability. In these cases, several statistic laws have been summarized after analyzing the relationships of them. The cone angle of the vortex,as a new concept has been used to characterize the turbine stability. Finally, some proposals have been recommended for the model research , the model test and the prototype preliminary design about the turbine stability.