涡轮弯扭叶片的几何造型  

Geometrical Modeling of Twist Turbine Blades

作　　者：赵万生[1] 詹涵菁[1] 王刚[1] 

机构地区：[1]哈尔滨工业大学特种加工及机电控制研究所,黑龙江哈尔滨150001

出　　处：《湖南大学学报（自然科学版）》2000年第5期33-38,共6页Journal of Hunan University:Natural Sciences

基　　金：国家教育部"跨世纪优秀人才培养计划"资助项目 !(教技函 [2 0 0 0 ]1号 )

摘　　要：现代涡轮叶片是弯曲、扭转、变截面的复杂流线型面 ,一般无法解析表达 .为满足叶片型面数控加工要求 ,针对给定若干叶片截面上型值点的情况 ,采用节点号参数化双三次 B样条插值曲面对完整弯扭叶片进行三维造型 ,并提出考察造型型值点网格密度是否满足加工精度要求的判断准则 .实际加工证明 ,此算法简洁、稳定 。Modern turbine blades are highly complex airfoils that are oblique and twist with non uniform section profiles,which hardly can be expressed analytically.With data points given on some predetermined blade sections,the geomerical modeling of the entire blade surface by means of bivariate cubic B spline interpolation with nodal number parameterization is described in this paper,and a criterion for judging the density of interpolation data points to meet the tolerance demands of CNC machining is also presented.Practical machining has shown that this algorithm is concise and stable,and is engineeringly friendly for turbine blade manufacturing.

关 键 词：涡轮叶片 涡轮机 三维样条造型 几何造型 

分 类 号：TK14[动力工程及工程热物理—热能工程]