A physical model of asymmetric vortices flow structure in regular state over slender body at high angle of attack

作     者：邓学蓥 王刚 陈学锐 王延奎 刘沛清 郗忠祥 

作者机构：Institute of Fluid Mechanics Beijing University of Aeronautics and Astronautics Beijing 100083 China Airfoil Research Center Northwest Polytechnic University Xian 710072 China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2003年第46卷第6期

页      面：561-573页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.10172017) Aeronautical Science Foundation ofChina(02A51048) Foundation of National Key Laboratory ofAerodynamic Design and Research(00JS51.3.2HK01) 

主　　题：slender body, high angle of attack, aerodynamics, asymmetric vortex flow, bistable flow. 

摘      要：In subcritical Reyolds number flow region, the repeatable and determinate asymmetric vortices flow at regular state can be obtained by manually setting mini-perturbation on the nose of a pointed ogive-cylinder model at high angle of attack and zero side slip. Test results of this study involve surface pressure distributions, sectional-side-force distributions and flow visualizations. The analyses of these results revealed a complicated multi-vortices system at regular state inwhich asymmetric twin vortices with inception region and fully developed region, asymmetric triple vortices, four vortices region, five vortices region and Karman-vortex-street-like flow region aredeveloped along the slender body. The correlation between multi-vortices system structures and corresponding sectional-side-force distribution is given. The behaviors of multi-vortices flow struc-ture at the peculiar points of sectional-side-force distributions and characteristics of corresponding pressure distribution are analysed. Finally, a physical model of asymmetric multi-vortices flowstructure in regular state over slender body is developed.