摘要
基于叶栅流动特征和参数化曲线构造方法,建立了一种基于速度三角形的透平亚声速叶型的参数化设计方法。设计过程分两步完成:第一步以叶栅进出口气流角为目标,选择合适的叶栅稠度,建立多项式表示的初始叶型;第二步以贝塞尔埃曲线表示初始叶型,设定叶型表面流动分布,采用叶栅PVD解法,修改叶型以逼近设计目标。应用该方法,设计了反动式和冲动式叶型,CFD流动性能分析的结果证明了该方法是有效可行的。
According to cascade flow characteristics and parametric curve method a new two-steps method based on the velocity diagram was proposed for subsonic turbine airfoil designing. Firstly, aimed to match the inlet and outlet flow angles, cascade solidity was investigated to initiate an airfoil with analytical polynomial line. Secondly, with prescribed velocity distribution on the suction surface, airfoil was parameterized by Bezier lines and modified to approach the design target using Prescribed Velocity Design（PVD） method. Impulse and reactive airfoils were designed using this method, with the analysis results of CFD cascade performances conducted by this method in terms of reliability and feasibility.
出处
《热力透平》
2015年第3期165-169,178,共6页
Thermal Turbine
基金
上海市科学技术委员会资助项目(14DZ1118200)
关键词
透平叶型
参数化曲线
气动反问题
turbine airfoil
parametric curve line
Prescribed Velocity Design（PVD）
