*Result*: 高空长航时无人机融合式翼梢小翼气动优化设计.

*To address the engineering requirements for improving the aerodynamic efficiency of medium to high altitude long-endurance UAVs, this paper takes a high-aspect-ratio UAV as the research object and conducts aerodynamic optimization design of blended winglets. By establishing a design system combining surrogatebased optimization and CFD computational methods, an optimization function aiming at minimizing total induced drag was developed. The study focuses on analyzing the influence of key aerodynamic parameters (winglet span length, height, and sweep angle) on wing pressure distribution and vortex structure. Results show that the optimized winglet configuration improves the lift-to-drag ratio by 9%, significantly enhancing UAV flight performance. The proposed blended winglet design methodology and parameter influence patterns provide an optimization approach balancing engineering feasibility and aerodynamic improvement for high-aspect-ratio UAVs, offering valuable references for enhancing aircraft flight performance. [ABSTRACT FROM AUTHOR]*

*针对高空长航时无人机气动效率提升的工程需求, 本文以大展弦比无人机为研究对象, 开展融合式翼梢小翼气 动优化设计。通过构建基于代理模型优化设计和CFD 计算方法的设计体系, 建立以全机诱导阻力最小作为目标的设计 优化函数, 重点分析翼梢小翼展长、上倾角、后掠角等关键气动外形参数对机翼压力梯度分布和涡系结构的影响。研究 结果表明, 优化后的翼梢小翼构型使全机升阻比提高9% 左右, 显著提升了无人机的气动性能与飞行效率。本文提出的 融合式翼梢小翼设计方法和参数影响规律, 为大展弦比无人机翼梢小翼设计提供了一条兼顾工程可行性和气动性能提 升的优化路径, 对提升飞行器的飞行性能具有重要参考价值。. [ABSTRACT FROM AUTHOR]*