一、前言 以前,空气动力学着重研究附着流型,以避免或推迟壁面分离为准绳。现在,对脱体涡流型的研究已使空气动力学跨入了新的领域。利用大前缘后掠角薄翼产生的脱体涡,可以大大改善飞行器的气动性能。一些新的气动布局,都考虑利用前体产生的脱体涡与后体产生的有利干扰来大幅度改善高速飞机的低速性能和机动飞行能力,例如近距耦合鸭式布局和边条翼布局等。国内外很多人研究了这种气动干扰,取得不少有益的成 I. INTRODUCTION In the past, aerodynamics focused on the attachment of flow patterns to avoid or delay the separation of the walls as the criterion. Now, the study of the body-off vortex has brought aerodynamics into new fields. The use of large leading edge swept angle thin wing generated off-body vortex, can greatly improve the aerodynamic performance of the aircraft. Some new aerodynamic layouts are designed to dramatically improve the low-speed performance and maneuverability of high-speed aircraft by utilizing the pro-voltaic projectile vortex shedding and the posterior body interference such as close-coupled canard layout and sidewing layout . Many people both at home and abroad have studied this kind of pneumatic interference and made a lot of useful achievements