涡轮叶片曲面重构与流体动力学数值分析

针对结构复杂的涡轮叶片检测与重建问题,利用逆向工程技术对涡轮叶片进行曲面重构,对采集到的点云数据进行数据处理,并在CATIA软件下完成叶片的精确曲面模型重建,采用CFD软件Fluent对不同流量工况进行全流场的数值模拟,揭示涡轮压气机叶片的翼型弯、厚度、攻角及雷诺数的影响情况。实验结果表明,逆向设计叶片翼型的升阻比在较大的迎角变化范围内略高于点云网格面叶片翼型,并且逆向设计叶片翼型的力矩系数高于点云网格面叶片翼型,说明逆向设计的叶片翼型的气动效率与风能利用率比原始叶片的更好,也说明逆向设计的叶片翼型的弯度大于原始叶片翼型,气动性能更好。

Based on the problem of inspection and reconstruction for complicated turbine blade,the reverse engineering for surface reconstruction of turbine blade is adopted.Data processing for the scanning point clouds and precision curved reconstruction of blade by CATIA software is done.Influence of airfoil bending,thickness,angle of attack and the Reynolds number were revealed through the CFD software for full-field numerical simulation in different flow conditions.Experimental results show that the lift-drag of reverse design of blade aerofoil slightly higher than point clouds of mesh surface in wide range of incidence angle.And the moment coefficient of reverse design of blade is higher than the point clouds.That also shows that the aerodynamic efficiency and the utilization of the wind energy are better than the original blade.The camber of reverse design blade is bigger than the original blade and aerodynamic performance is better.