基于代理模型的旋翼翼型动态失速优化设计  

Dynamic stall optimization design of rotor airfoil based on surrogate model

作　　者：喻伯平 李高华[1] 谢亮 王福新[1] YU Bo-ping;LI Gao-hua;XIE Liang;WANG Fu-xin(School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学航空航天学院,上海200240

出　　处：《浙江大学学报（工学版）》2020年第4期833-842,共10页Journal of Zhejiang University：Engineering Science

基　　金：装备预先研究项目(41406040202).

摘　　要：利用代理模型方法取代计算流体动力学(CFD)方法,开展旋翼翼型的动态失速特性优化设计.建立基于动网格技术的旋翼翼型非定常气动特性求解方法,获得旋翼翼型在不同外形下的升阻力和力矩气动特性参数.利用类型转换(CST)翼型参数化方法,对初始翼型进行拟合重构;选取12个设计参数,利用基于自然启发的全局优化差分进化算法,优化目标是降低旋翼翼型的力矩和阻力特性,主要限制条件是保证升力特性不降低和翼型厚度增幅不明显.将本文的优化设计结果与基于伴随方法和CFD方法的优化结果进行对比.结果表明,基于Kriging模型的动态失速特性优化方法与伴随方法相比,在二维翼型优化设计上具有更好的寻优性能,优化翼型气动特性的表现更好;该方法与CFD方法相比,在利用全局优化算法的优势下,减少了过早陷入局部最优点的可能性,对比优化结果表明,在力矩和阻力特性相差无几的情况下,升力特性的表现更优.The surrogate model was used to replace the computational fluid dynamic(CFD)method to optimize and design rotor airfoil considering dynamic stall characteristics.The unsteady aerodynamics calculation of rotor airfoil based on moving grid technology was established to obtain the lift,drag and torque coefficients under different airfoil shapes.The class shape transformation(CST)airfoil parameterization method was used to conduct fitting and reconstruction of the initial airfoil,and 12 design parameters were selected.The global optimal differential evolution algorithm based on natural heuristic was used to reduce the airfoil’s torque and drag coefficients.The main limiting condition was to ensure that the lift characteristics were not reduced and the airfoil thickness increase was not obvious.The optimization results of the method were compared with those of the adjoint and CFD method.Results show that the optimization method based on Kriging model has better search performance and better aerodynamic performance than the adjoint method in the two-dimensional airfoil optimization.The possibility of prematurely falling into the local best was reduced under the advantage of using the global optimization algorithm compared with CFD method.The comparison optimization results show that the lift characteristics are better when the torque and resistance characteristics are almost the same.

关 键 词：旋翼翼型 动态失速 气动优化设计 代理模型 

分 类 号：V212[航空宇航科学与技术—航空宇航推进理论与工程]