大迎角下俯仰振荡对细长体气动特性的影响  

Investigation of aerodynamic characteristics on a pitching slender body of revolution at high angles of attack

作　　者：叶瑞[1] 李栋[1] 夏明[1] 

机构地区：[1]西北工业大学翼型叶栅空气动力学国防科技重点实验室,陕西西安710072

出　　处：《空气动力学学报》2011年第6期681-687,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(10772149)

摘　　要：通过对头部无扰动和有扰动的两个细长体模型进行数值计算,分析了各个流场中涡系结构和气动力变化历程,并对比两者之间的差别。发现在高频率小振幅的俯仰振荡作用下,头部无扰动和有扰动的细长体的流场随时间的发展慢慢由非对称转变为对称。相对于头部有扰动的细长体,在第一个振荡周期内非定常俯仰运动对头部无扰动的细长体作用更明显。Computations are performed to simulate a slender body without disturbance flow flied and a slender body with nose-disturbed flow flied. By analyzing the vortex structure of flow field and aerodynamic force, it is showed that both of flow field gradually change from asymmetry to symmetry under the high frequency of small amplitude pitching oscillation. Pitching motion has more effect on flow field around the slender body without disturbance compared with the slender body with nose-disturbed in the first period.

关 键 词：细长体 大迎角 DES方法 俯仰振荡 非对称涡控制 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]