NURBS曲线在叶轮设计中的应用分析

Application of NURBS Curve in Impeller Design

介绍一种采用NURBS对叶轮叶片的关键截面和基迭线进行参数化表达的风力机叶片设计方法,先介绍了NURBS曲线设计叶片的优点、概述定义和数学模型,然后针对风机叶片的造型设计,讨论了用NURBS曲线生成方法,及三维模型设计方法,并最终完成了叶轮的三维模型建立与实体加工。该方法有效提高了风力机叶片设计的质量。

The solid model of impeller is the basis of finite element analysis and NC machining.Surface modeling is the key to solid model of integral impeller, which directly affects the aerodynamic performance of turbomachinery.This paper introduces a design method of wind turbine blades which uses NURBS to parameterize the key sections and base lines of blades.Firstly, the advantages, definition and mathematical model of NURBS curve designed blades are introduced.Then, aiming at the modeling design of fan blades, the method of generating NURBS curve and the design method of three-dimensional model are discussed.Finally, the three-dimensional model establishment and physical processing of the impellers is completed.This method effectively improves the quality of wind turbine blade design.