【摘要】 将N-S方程流场分析程序和序列二次规划结合起来,提出了一种工程实用的直升机旋翼翼型设计方法,以提高旋翼翼型在悬停、前飞和机动等多个设计点及在多种约束条件下的气动性能。由N-S方程计算得到的升力、阻力等气动参数构成目标函数,应用数值优化程序对其进行最优化。计算实例表明:本方法设计质量高,所需机时少,易于实施,有较大的工程应用价值。更多还原

【Abstract】 This paper presents a rotor airfoil design method that couples with viscous flow analysis and numerical optimization to search an airfoil geometry with the improved aerodynamic performance characteristics at multiple design-point while satisfying the specified design constraints. The flow was modeled with Reynolds-averaged Navier-Stokes equations in order to produce reliable designs. The multipoint optimization algorithm was based on SQP(Successive Quadratic Programming) method. Example results are shown for the rotor the blade airfoil design. The study indicates that the proposed approach is attractive for practical use because of its high design quality and reasonable computational cost.更多还原