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研究构建了基于离散伴随方法的叶轮机械叶栅气动反设计系统,将离散伴随系统从无黏环境扩展到了黏性环境,编程实现了黏性离散伴随求解器;改善了叶栅参数化方式并重新编程实现了叶栅参数化程序,解决了叶栅参数化过程中叶栅尾缘附近区域型线波动的问题。利用该系统对某二维跨声速透平叶栅在给定叶型壁面目标压力分布的情况下,通过构造目标函数将叶栅反设计问题转化为气动优化设计问题,成功进行了气动压力反设计。结果证明本文建立的叶栅反设计系统能够有效进行压力反设计,验证了本文建立的基于离散伴随方法叶轮机械叶栅气动反设计方法的正确性与有效性。
The aerodynamic counter-design system of impeller mechanical cascade based on discrete adjoint method is studied. The discrete adjoint system is extended from viscous environment to viscous environment. The viscous discrete adjoint solver is programmed and the parameterization mode of cascade is improved. Programmed and implemented the cascade parameterization program to solve the problem of the fluctuation of the profile line near the trailing edge of the cascade during the parameterization of the cascade. By using this system, the target pressure distribution is obtained for a two-dimensional transonic turbine cascade, and the objective function is used to convert the inverse cascade design into the aerodynamic optimization design. The aerodynamic pressure inverse design . The results show that the cascade anti-design system established in this paper can effectively design the pressure inverse design and verify the correctness and validity of the aerodynamic inverse design method of the impeller mechanical cascade based on the discrete adjoint method.