细长体截面流态拓扑结构演化及其稳定性分析  

Topological Structure Evolution and Stability of the Cross Flow Pattern Around a Slender

作　　者：李国辉[1] 邓学蓥[1] 

机构地区：[1]北京航空航天大学飞行器设计与应用力学系

出　　处：《北京航空航天大学学报》2001年第6期674-676,共3页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：应用动力系统的稳定性理论 ,分析了细长体在不同迎角下截面绕流拓扑结构的演化和稳定性 .指出旋成体背涡的发展 ,导致截面流场拓扑结构变化 ,而由稳定对称旋涡流态变成不稳定对称旋涡流态 ,进而再在小扰动下变成稳定非对称旋涡流态是导致旋成体非对称背涡出现的基本历程 .Topological structure and stability of a slender cross flow at different angles of attack was discussed by the stability theory of dynamic system. It was proved that the development of slender vortices leads to the change of topological structure about cross flow. And it is the change from stable and symmetrical vortices flow pattern to instable and symmetrical vortices flow pattern, and then to stable and asymmetrical vortices flow pattern due to little disturb which leads to the development of asymmetrical slender vortices.

关 键 词：细长体截面 拓扑流形 动力稳定性 非对称背涡 战斗机 结构演化 

分 类 号：V211.4[航空宇航科学与技术—航空宇航推进理论与工程] V212.121