叶片中弧线的一种混合算法研究  

Hybrid numerical approach for extraction camber curve of turbine blades

作　　者：方志阳 骆天舒[1] 徐少杰 方寅[1] FANG Zhi-yang;LUO Tian-shu;XU Shao-jie;FANG yin(Hangzhou Steam Turbine Co.,Ltd.,Hangzhou 310022,China)

机构地区：[1]杭州汽轮机股份有限公司,浙江杭州310022

出　　处：《机电工程》2018年第7期717-720,共4页Journal of Mechanical & Electrical Engineering

摘　　要：针对求解透平叶片二维截面型线中弧线时,很难得到叶片前缘及尾缘的内切圆问题,研究了采用不同算法求解二维型线内切圆的过程。提出了采取一种混合方法求解二维型线内切圆的方法:在进气边和出气边采取标准的最优化方法拟合出内切圆,在中部采取传统方法求内切圆;将该混合方法编成程序,对某NACA65系列叶型及某型燃气轮机叶片进行了试算验证。研究结果表明:采用该算法计算所得之NACA65叶型中弧线及厚度分布规律与原始数据差别甚微;采用该方法计算实际产品叶型时在叶片前缘及尾缘收敛性良好,很容易得到前缘和尾缘的内切圆,在叶片中部与传统方法无异。Aiming at the problem that the inscribed circles of leading edges and trail edges of turbine blades are difficult to obtain in solving the mean-camber curve of two dimensional profiles of turbine blades,several algorithms were investigated. A hybrid approach was proposed to solve inscribed circles of 2 D profiles. The approach is that standard optimization methods were applied to search inscribed circles fitting leading edges or trail edges,traditional approaches were employed to calculate inscribed circles of other regions of a blade profile. A software employing the hybrid approach was utilized to investigate NACA65 series compressor blades and blades of a gas turbine. The results indicate that the mean line and thickness distribution calculated by this approach is slightly different from original classical data; The results demonstrates good stability in solving inscribed circles of leading edges and trailing edges,but there are no differences at other regions.

关 键 词：中弧线 透平叶型 最优化 

分 类 号：TH122[机械工程—机械设计及理论] TK26[动力工程及工程热物理—动力机械及工程]