考虑动力影响的公务机全机气动伴随优化探索

Exploration on the adjoint aerodynamic optimization of a business jet considering intake and exhaust effects

基于伴随方程梯度求解方法,利用非均匀有理B样条多项式的自由曲面变形参数化方法和序列二次规划优化搜索算法,建立了一种考虑动力影响的全机一体气动优化设计方法,并采用该优化方法对某尾吊布局高速涡扇公务机的后体机身开展了减阻优化设计。研究结果表明:该方法可有效实现全机参数化自由变形,优化构型的全机压差阻力得到了有效降低,后续可为民机复杂构型多部件一体气动优化设计提供技术基础。

In this paper, an aerodynamic optimization method for full-aircraft configuration considering intake and exhaust effects was developed based on adjoint gradient method, non-uniform rational B-splines free form deformation parameterization method and sequential quadratic programming algorithm. Further, the method was used to minimize the afterbody drag of a high-speed business jet. The results show that this method can effectively realize the parametric free form deformation of the entire aircraft, and the pressure drag of the full aircraft is effectively reduced. Therefore, this method can provide a technical basis for complex configuration or multi-component aerodynamic shape optimization of civil aircrafts in the future.