高超声速折叠翼飞行器气动特性分析  

Analysis of aerodynamic characteristics of hypersonic folding-wing aircraft

作　　者：吴枣平 秦剑 吴杰[1] WU Zaoping;QIN Jian;WU Jie(College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空学院,南京210016

出　　处：《航空工程进展》2024年第6期158-163,173,共7页Advances in Aeronautical Science and Engineering

基　　金：江苏省自然科学基金(BK20231437)。

摘　　要：在执行任务时,高超声速飞行器面临外部环境的复杂性,需应对多种任务挑战。常规固定翼飞行器在特定工况下的最佳气动性能有限,而变体飞行器能够通过改变气动外形,控制其飞行特性,以适应不同的任务环境。采用数值模拟方法,分析高超声速折叠翼飞行器在机翼折叠前后的气动特性变化,阐明机翼折叠是如何影响这些特性的;同时,探讨机翼折叠过程中,机翼的气动弹性对飞行器气动特性的影响。结果表明:机翼的折叠过程对阻力系数的影响较小,但对升力系数与升阻比产生较大的影响;此外,由于翼尖激波的存在,应力主要集中在飞行器头部与翼尖部分,导致气动弹性对飞行器的气动特性影响较小。Hypersonic aircraft encounter challenges in adapting to complex external environments during missions.Conventional fixed-wing aircraft have limited optimal aerodynamic performance under specific conditions.In contrast,morphing aircraft can adapt to various mission environments by altering their aerodynamic shape to control their flight characteristics.Based on numerical simulations,the changes in aerodynamic characteristics of a hypersonic folding-wing aircraft before and after wing folding are analyzed in this paper for revealing the effects of wing folding on aerodynamic performance.Meanwhile,the influence of aeroelasticity in the wing on the aerodynamic characteristics of the aircraft during the wing folding process is discussed.The results show that the wing folding process has a little effect on the drag coefficient but significantly affects the lift coefficient and lift-to-drag ratio.Moreover,due to the presence of shock waves at the wingtips,stress is mainly concentrated in these areas,resulting in a relatively small impact of aeroelasticity on the aircraft´s aerodynamic behavior.

关 键 词：折叠机翼 高超声速 气动特性 数值模拟 气动弹性 

分 类 号：V211.41[航空宇航科学与技术—航空宇航推进理论与工程] V411