飞翼布局高低速一体化气动优化设计

Aerodynamic optimization design of high and low speed integration for flying wing layout

飞翼布局由于在气动、隐身和结构等方面的综合优势,是未来最有潜力的飞行器气动布局形式。关于飞翼布局的气动设计研究,学术界开展了大量的设计分析,研究发现低速起降性能和操控是飞翼布局性能和安全的主要难点。对于飞翼布局无人机和作战飞机,由于隐身设计的影响,使得其低速起降性能、操控特性更加严苛,以往的研究主要集中在高速巡航的设计,关于低速设计研究很少,因此基于高性能离散伴随优化设计平台,开展了某飞翼布局无人机的高低速综合设计研究,分析对比了不同低速设计模型对飞机低速特性的影响,在此基础上,建立了高低综合设计模型,全面提升了飞机的高低速性能,经过对结果的分析,总结了高低速一体化设计的要点和规律,为飞翼布局的气动设计提供了有力的设计模型和参考。

The flying wing layout is the most promising aerodynamic layout for future aircraft because of its advantages in aerodynamics,stealth and structure.A large number of design analyses conducted in academia for flying wings reveal that the low-speed takeoff/landing performance and controllability are the main difficulties in the performance and safety of the flying wing layout.For the flying wing layout UAVs and combat aircraft,the low-speed performance and controllability are further deteriorated due to the influence of the stealthy design.Previous research has mainly focused on the design of high-speed cruising,while little research on low-speed design can be found.This paper examines the high and low speed integrated design of a flying wing layout UAV based on the high-performance discrete adjoint optimization design platform.First,the effects of different low-speed design models on the low-speed characteristics of the aircraft were compared.Then,a high and low integrated design model was established,comprehensively improving the high and low speed performance of the aircraft.Finally,the results were analyzed,and the main points and rules of the high and low-speed integrated design were summarized,providing a powerful and effective method for the aerodynamic design of the flying wing layout.