加工误差对压气机叶栅气动性能的影响

目的 研究不同区域加工误差对叶片气动性能的影响。方法 选用轴流压气机出口级静叶叶中截面，以叶型厚度变化和中弧线变化为特征，分别在叶型前缘、最大厚度和尾缘区域添加加工误差，采用数值模拟方法，对比设计叶型气动性能，研究叶型各区域几何偏差对性能的影响。结果 叶型前缘几何偏差对气动性能的影响最大，偏差造成的中弧线偏移对性能变化起主导作用。尾缘区域几何偏差对性能的影响趋势与前缘区域完全相反。考虑叶型整体偏差时，轮廓度正偏差造成的性能恶化更加显著。结论 所得的几何偏差影响规律可为实际叶片加工过程中工艺的制定和超差审理提供数据支持。

Impact of Manufacturing Variations on Aerodynamic Performance of Compressor Blade

The work aims to study the impact of manufacturing variations of different regions on the aerodynamic performance of the blade. The middle section of export-grade static blade of axial compressor was selected. With the blade thickness change and midline change as the characteristics, manufacturing variations were added to leading edge, maximum thickness and trailing edge of blade. The numerical simulation method was used to compare the aerodynamic performance of designed blade and study the impact of geometric variations of different regions on the performance. The geometric variations of leading edge of blade had the greatest impact on aerodynamic performance and the deviation of midline caused by the variations played a leading role in the performance change. The impact trend of geometric variations of trailing edge on the performance was completely opposite to that of geometric variations of leading edge. Considering the overall variations of blade, the performance deterioration caused by the positive deviation of profile was more obvious. The obtained impact law of geometric variations can provide data support for the formulation of process and over-variation trial in the actual blade manufacturing process.