基于响应面法的贯流式水轮机转轮叶片优化设计  

Tubular Turbine Runner Blade Optimization Design Based on the Response Surface Method

作　　者：王子瑞[1] 李明桥[1] 赵妍[1] 刘君[1] 于佼 马朵[1] 邓志勇[1] 

机构地区：[1]西北勘测设计研究院有限公司机电设计院,西安710065

出　　处：《大电机技术》2015年第6期43-46,共4页Large Electric Machine and Hydraulic Turbine

摘　　要：以贯流式转轮叶片为研究对象,采用bezier曲线对叶片进行参数化表达;选取叶片挠度、进水边位置、进口角等叶片形状参数为优化变量,采用极差分析法对8个优化变量进行了敏感度分析;基于中心复合实验设计方法对敏感度较高的4个优化变量安排CCD试验,并进行响应面分析,得到了优化目标与优化变量之间的二次函数关系,并采用梯度寻优方法对叶片型线进行了优化设计;对优化前后的转轮进行了全流道定常流动数值模拟。结果表明,优化后的转轮叶片效率明显提高,正背面压力分布有所改善,整体水力性能得到了有效提高。This paper expresses the parameterized tubular turbine blade with Bezier curve. The author selects the bending, inlet position and angle change as optimization varibles, and make a sensitivity analysis of eight parameters using extreme difference analysis and arrange CCD experiments for the four optimization variables with higher sensitivity according to central composite experiment design method. After that,we must make a response surface analysis thus getting four paremeters with higher sensitivity, in addition, it arrange CCD experiments based on design expert software and make a response surface analysis, fit the function relation between objective function and factors, thus getting the function relation between optimization objective and optimization variables. The author optimizes the blade profile using gradient method and make a numerical simulation with the optimized and the initial runner. The result indicates an increase in efficiency with runner blade and an improvement for the pressure and suction side of blade and overall performance.

关 键 词：参数化 BEZIER曲线 敏感度 响应面 

分 类 号：TK733.8[交通运输工程—轮机工程]