The effects of vortex breakdown on the static rolling aerodynamics of finned slender body  

作　　者：XU KeZhe ZHANG YuFei CHEN HaiXin FU Song 

机构地区：[1]School of Aerospace,Tsinghua University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2014年第11期2174-2176,共3页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key Basic Research Program of China(Grant No.2014CB744801);the National Natural Science Foundation of China(Grant Nos.11102098 and 11372160)

摘　　要：The static rolling aerodynamics of a finned slender body is numerically studied in this paper.Simulation results show a nonlinear uprising of the rolling moment when the angle of attack is greater than 20°in subsonic flows.Asymmetric vortex break down phenomenon on the"horizontal"rudders is found to be responsible for this phenomenon.By introducing the geometric-equivalent angle of attack and geometric-equivalent sweep angle,the cause of the nonlinear rolling moment characteristics can be explained by the delta wing vortex breakdown analysis.The static rolling aerodynamics of a finned slender body is numerically studied in this paper. Simulation results show a nonlinear uprising of the rolling moment when the angle of attack is greater than 20° in subsonic flows. Asymmetric vortex break down phenomenon on the ＂horizontal＂ rudders is found to be responsible for this phenomenon. By introducing the geometric-equivalent angle of attack and geometric-equivalent sweep angle, the cause of the nonlinear rolling moment characteristics can be explained by the delta wing vortex breakdown analysis.

关 键 词：vortex breakdown rolling moment delta wing slender body 

分 类 号：O355[理学—流体力学]