环量控制飞翼翼型隐身与气动联合优化

Optimization of Stealth and Aerodynamics for Circulation Control Flying-Wing Airfoil

飞翼无人机可利用主动流动控制技术取代传统舵面,避免舵面偏转产生的雷达回波,能够获得更好的隐身性能。本文面向装载环量控制器的大展弦比飞翼无人机,提出了一种兼顾气动和隐身性能的飞翼翼型联合优化方法。针对包含环量控制(Circulation control,CC)机构的二维翼型建立了基于代理模型的联合优化框架,并通过寻优求解,获得了Pareto前沿解集。选择Pareto前沿中的3个点对应的二维翼型进行了气动与隐身性能评估,数值计算结果证实了本文提出的联合优化方法的可行性。

Flying⁃wing unmanned aerial vehicles can use active flow control technology to replace traditional control surfaces,avoiding radar echoes generated by control surface deflection,and can achieve better stealth performance.This article proposes a joint optimization method for high aspect ratio flying⁃wing unmanned aerial vehicles loaded with circulation controllers,which considers both aerodynamic and stealth performance.A joint optimization framework based on surrogate model is established for the two-dimensional airfoil containing circulation control(CC)mechanism,and the Pareto frontier solution set is obtained through optimization solution.The aerodynamic and stealth performance of the two-dimensional airfoil corresponding to three points in the Pareto front is evaluated,and the numerical results confirm the feasibility of the joint optimization method proposed in this paper.