摘要
针对马赫数6、迎角6°圆锥边界层背风面流向涡开展了直接数值模拟和稳定性分析,其中,稳定性分析工具包括空间BiGlobal方法和面推进的PSE3D方法。研究发现,有迎角圆锥边界层背风中心线附近会自发形成一对对转的强流向涡。这对流向涡或因低频反对称模态和高频对称模态的共同作用而在下游破碎。
The stability of leeward streamwise vortices over a Mach 6 yawed cone with 6 degree angle of attack is investigated by using direct numerical simulation(DNS)and stability analyses including spatial BiGlobal and planemarching parabolized stability equations(PSE3 D).It is found that a pair of strong streamwise vortices inducing lowspeed mushroom structure simultaneously emerge in the vicinity of the leeward plane.Theoretical results indicate that both low-frequency sinuous modes and high-frequency varicose modes may play an important role in the breakdown of the streamwise vortices.
作者
陈曦
陈坚强
董思卫
徐国亮
袁先旭
CHEN Xi;CHEN Jianqiang;DONG Siwei;XU Guoliang;YUAN Xianxu(State Key Laboratory of Aerodynamics,Mianyang 621000,China;Computational Aerodynamics Institute of China Aerodynamics Research and Development Center,Mianyang 621000,China)
出处
《空气动力学学报》
CSCD
北大核心
2020年第2期299-307,共9页
Acta Aerodynamica Sinica
基金
国家重点研发计划(2016YFA0401200)
国家数值风洞工程(2018-ZT1A03)。
