高负荷风扇转子叶片反问题设计

为改进高负荷风扇转子性能,采用了一种工程适用的叶片反问题设计方法。该方法使用粘性CFD与数值优化相结合,适合具有高进口马赫数、高逆压梯度流动特征的高效叶型设计,并应用二维叶型反问题加三维积叠的叶片设计思路,充分继承了已有的基元叶型积叠准则,极大地缩短了计算时间。利用发展的反问题设计平台,完成了叶片的反问题设计。三维数值模拟结果表明:反问题设计的转子叶片能较好地控制转子尖部激波结构,减小激波损失,提高效率,增大稳定裕度。

An Inverse Method for High Loading Fan Rotor Airfoil Design

An inverse method of airfoil design adapted for engineering application has been employed to improve the performance of high loading fan rotor.The basic ideas of combination of viscous CFD and numerical optimization can meet airfoil design requirements with the element profile flow characteristics of high inlet Mach number and high adverse pressure gradient,etc.Succeeding to the design criterion of element profile stacking,the two-dimensional inverse method and three-dimensional stacking can save the computing time greatly.The airfoil design has been carried out by using the inverse method numerical platform.The results of numerical simulation showed that the rotor airfoil designed with the inverse method can control the shock structure,decrease the shock loss,improve the efficiency and increase the surge margin.