基于局部拟合的压气机叶片加工坐标生成方法

建立了基于前缘局部拟合技术生成叶片加工坐标的方法。包括网格插值、造型逼近、局部拟合和叶型光顺等步骤。以某多级高效率高负荷轴流压气机第2级转子为例,通过几何分析与计算流体动力学分析检验了该方法。结果验证了所生成的加工坐标的几何准确性,且对叶片热转冷有限元分析,本文方法所需的网格数量比现有技术节省约75%,计算时间节省75%以上。本文方法相比现有技术可提高工作效率,更好满足工程需求。

Method of Generating Compressor Airfoil Manufacturing Coordinates Based on Local Fitting

A Method of generating airfoil manufacturing coordinates for axial compressor was proposed based on leading edge local fitting technique. The method includes mesh interpolation, model approaching, local fitting, and profile smoothing. It was verified on the second rotor of a high efficiency and highly loaded multistage axial compressor, through geometry analysis and computational fluid dynamics analysis. The result validated the geometry precision of the generated airfoil manufacturing coordinates, while the grid quantity for blade hot-to-cold transform finite element analysis was reduced by about 75% comparing with the current technique, so that the computation time was reduced over 75%, which proved that this method was in capacity to improve work efficiency and satisfy engineering requirements.