高隐身飞翼布局翼型敏感性分析及优化设计

High-stealth flying wing layouts must meet the requirements of wideband stealth design. Traditional aerodynamic shape stealth design mainly targets the high-frequency optical range, and there is relatively little research on aerodynamic shape stealth design for wing profiles in the resonance range, making it incapable of providing effective guidance for wideband stealth design of flying wing aerodynamic shapes. To address these issues, research on wideband stealth design of wing layouts was conducted. Firstly, the basic effects method was used to study the sensitivity of wing profile parameters in different frequency bands, and it was found that the requirements for low-frequency stealth design and aerodynamic design have different sensitivity areas to the aerodynamic shape of the airfoil, and there are complex contradictions in stealth design in different frequency bands. This is the basis for a wideband stealth design model for wing layout, and NACA65,3-018 airfoils are used for aerodynamic optimization design that takes wideband stealth into account. The results show that the established wideband stealth design model can improve the aerodynamic performance of wing layout airfoils, simultaneously achieving wideband high stealth characteristics.