基于EFFD参数化的风扇/压气机叶片-端壁一体化伴随优化设计

为解决传统扰动参数化方法的设计能力不足等问题，以拓展自由变形技术为基础开发相应参数化方法以改进伴随优化 系统，并对典型跨声速风扇/压气机转子Rotor 67进行叶片-端壁一体化伴随优化。结果表明：经过伴随优化，Rotor 67转子在流量、 压比等工况约束变化较小的前提下效率提升了0.74%，且整体特性同样得到了大幅改进，而优化前后的几何与流动变化表明，端 区几何调整及叶片吸力面变化引起的吸力面加速减弱、激波强度降低、角区分离涡结构改进等，均是性能提升的内在原因。

The Coupled Adjoint Optimization of Blade and Endwall in Fan/Compressor Based on EFFD Parameterization Method

In order to solve the problem of insufficient design capability of traditional perturbation parameterization methods, a corresponding parameterization method was developed based on the Extended Free-Form Deformation (EFFD) technology to improve the coupled adjoint optimization system, and coupled adjoint optimization of blade and endwall was carried out for the typical transonic fan/compressor rotor of Rotor 67. The results show that, through coupled adjoint optimization, the efficiency of the optimized Rotor 67 is increased by 0.74% under the premise of small changes in flow, pressure ratio and other operating conditions. The overall characteristics have also been greatly improved. The geometric and flow changes before and after the optimization show that the internal reasons for the performance improvements are the reduction of suction surface acceleration, the reduction of shock wave strength, and the improvement of corner separated vortex structure caused by the geometric adjustment of the end zone and the change of blade suction surface.