采用基于神经网络及遗传算法的叶轮机械叶片三维优化设计方法开发高载荷透平动叶片

摘要

In order to improve turbine internal efficiency and lower manufacturing cost, a new highly loaded rotating blade has been developed. The 3D optimization design method based on artificial neural network and genetic algorithm is adopted to construct the blade shape. The blade is stacked by the center of gravity in radial direction with five sections. For each blade section, independent suction and pressure sides are constructed from the camber line using Bezier curves. Three-dimensional flow analysis is carried out to verify the performance of the new blade. It is found that the new blade has improved the blade performance by 0.5%. Consequently, it is verified that the new blade is effective to improve the turbine internal efficiency and to lower the turbine weight and manufacturing cost by reducing the blade number by about 15%.%为了提高透平的内效率及降低制造成本,采用基于神经网络及遗传算法的叶轮机械叶片三维优化设计方法,开发了一种高载荷动叶片.该叶片是以5个截面的重心沿径向积叠而成.每个截面的内背弧是以基于叶型中弧线的Bezier曲线来构造.三维流动分析表明,新叶片提高效率0.5%.通过减少叶片数约15%,新开发的高载荷动叶片不仅有效地提高了透平的内效率,同时降低了透平重量和制造成本.