太平哨水电厂HL240型水轮机转轮改型研究

现代计算机数值模拟技术的不断进步，为水轮机转轮的改型设计创造了条件。HL240型水轮机能量指标低、过流能力差，国内相当一部分中小型水电站是套用此转轮。应用考虑转轮来流有旋、叶片有限厚及转轮叶片力作用的转轮与导叶联合作用的基于S1流面的准三维设计模型，研究出HL240的改进型转轮，并通过相对效率法效率试验对比，鉴定了改型转轮的效率特性。结果表明，水轮机效率特性明显增加，在高负荷区表现尤为明显。

Redesign of Francis Runner HL240 for Taipingshao Hydropower Station

Francis Runner HL240 was one type of Soviet water turbines in the 1940's,which was introduced into China in the middle of 1950 's and was employed by many middle-and-small domestic hydropower stations. The runner has distinctly low level in energy index and discharge capacity as well. The paper lucubrated on the redesign of Francis Runner HL240. The paper applied quasi-three dimensional design model and optimization design model based on S1 flow surface that was effected by runner and guide vane jointly. The vortex flow, blade thickness limitation and runner blade force functions were taken into account. The paper got the improved runners of HL240 type. Furthermore, eificiency test based on relative efficiency method is carried out in order to compare the efficiency. It showed that the redesign of the turbine runner was successful and the benefits gained were remarkable, which achieved the expectant goals.