摘要
采用亚迭代耦合求解流体动力学方程和刚体动力学方程数值研究方法,建立无时间滞后的耦合数值手段来分析研究飞行器非定常的耦合运动特征,研究细长三角翼多自由度非定常的耦合关联运动。研究表明:在流动结构失稳后机体运动逐步形成极限环振荡的自维持运动,滚转力矩系数滞回曲线呈现典型的“双8”稳定形态;在滚转和侧滑2自由度下,三角翼进行“落叶式飘荡”耦合运动,自激滚转振荡更为剧烈。
By sub-iterative synchronous solution of fluid dynamics equations and rigid-body dynamics equations, a coupling numerical method is proposed to explore the unsteady movement characteristics of aerocraft and to study the unsteady multi-freedom connected movements about a slender delta-wing. It is shown that the motion develops gradually to a self-maintained stable limit-cycle-oscillation after the flow structure becomes unstable. The roll moment curve in one cycle takes on a typical stable ＂double 8＂ form. Delta-wing shows a coupling motion as a dancing and swinging leaf under the roll and sideslip two degrees of freedom. At the same time,the self-excited rock oscillation becomes more intensive.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2007年第1期14-19,共6页
Acta Aeronautica et Astronautica Sinica
基金
国防科技预研基金
