基于正交试验的斜击式水涡轮优化与分析

参考斜击式水轮机结构设计方法，使用正交试验法对JP75卷盘喷灌机水涡轮的主要几何参数进行优化试验，并对优化结果进行相关系数及主成分分析，最后确定影响效率的主要因素及水涡轮最优参数组合.使用优化后的参数建立水涡轮最优模型，并采用CFD数值计算方法对流量为500～900 r/min、转速为18～40 m3/h下优化模型的性能进行计算及分析；在此基础上，分析了水涡轮外特性曲线，优化模型在非设计转速下具有较高的稳定性和高效性.在流量区间内，优化模型最高效率点提升了近31%；研究了水涡轮优化模型的内部流场分布, 相比于原有模型，内部流场更为合理流畅，进口管道内压力分布均匀，且能够形成有效射流，同时，水涡轮叶片的优化设计解决了存在的局部高压区和叶间涡问题；与原有模型进行能量转化率比较，验证了转轮处能量有效利用率明显提升了42.71%.

Analysis and optimization of Turgo hydraulic turbine based on orthogonal experiment design

Based on design method for Turgo turbine structure, the optimal parameter combination was analyzed and selected by using orthogonal experiment design. An optimal turbine model was built and simulated numerically by using CFD technique to explore its performance, stability and efficiency at 500-900 r/min rotational speeds and 18-40 m3/h flow rates. In these flow rate and speed ranges, the optimal model has so high working efficiency that the best efficiency increases nearly up to 31%. The internal flow in the optimal model is more reasonable and smoother, and the uneven distribution of pressure in the inlet duct has been removed and an effective jet is formed as well. At the same time, the problem of local high pressure zone and the vortex between two blades disappear. Compared with the original model, the energy conversion efficiency of the runner was improved by 42.71%.