涡轮叶片逆向建模与特征参数提取  

3D Model Reconstruction and Its Feature Parameters Extraction of a Turbine Blade

作　　者：赖喜德[1] 李广府[1] 张惟斌[1] 陈小明[1] 宋威[1] 江海 

机构地区：[1]西华大学能源与环境学院,四川成都610039 [2]中航工业成都发动机(集团)有限公司,四川成都610503

出　　处：《西南交通大学学报》2013年第5期915-920,共6页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(51379179);四川省教育部共建重点实验室资助项目(SBZDPY-11-7);四川省教育厅成果转化培育资助项目(11ZZ002)

摘　　要：为了在已有涡轮叶片实物基础上进行再创新设计,采用激光扫描仪对涡轮叶片进行数字化扫描,提出了在三维测量得到涡轮叶片点云数据的基础上,准确进行逆向建模、反求几何参数和提取气动特征参数的逆向设计方法.根据涡轮叶片的几何参数反求和提取气动特征参数要求,基于获取涡轮叶片的截面点云图,用五次多项式曲线拟合叶盆和叶背,并用圆弧逼近叶形前后缘.基于该方法,采用Matlab软件对涡轮截面线点云进行拟合,反求得到了叶身型线方程,拟合偏差控制在[-0.01 mm,0.01 mm]之内,能够获得准确的叶片截面型线和气动特征参数.In order to achieve an innovation design of turbine blades,the point cloud data of an existing turbine blade was digitally acquired by a handy laser scanner,and then a reverse design methodology was proposed to accurately reconstruct a 3 D digital model and extract the geometric and aerodynamic feature parameters from the point cloud data.In order to obtain the blade section profiles and extract the geometric and aerodynamic feature parameters accurately,using the point cloud data of the turbine blade,the pressure side and suction side were fitted with quintic polynomial curves,and the trailing and leading edges were approximated with the arc.The results show that using the methodology,the curve equation of blade section profiles can be approximated with a deviation in the range of [-0.01 mm,0.01 mm] with Matlab software,and the geometric and aerodynamic feature parameters can be extracted from these curve equations accurately.

关 键 词：涡轮叶片 逆向工程 叶身型线 特征参数提取 五次多项式拟合 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]