| 后掠三角翼的摇滚及其动态演化问题 |
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| 引用本文： | 张涵信,刘伟,谢昱飞,叶友达.后掠三角翼的摇滚及其动态演化问题[J].空气动力学学报,2006,24(1):5-9. |
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| 作者姓名： | 张涵信 刘伟 谢昱飞 叶友达 |
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| 作者单位： | 中国空气动力研究与发展中心,四川,绵阳,621000;国家计算流体力学实验室,北京,100083 |
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| 基金项目： | 国家自然科学基金(90205013) |
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| 摘 要： | 利用非线性动力学理论和NS方程与飞行力学方程耦合的数值模拟,研究分析了后掠三角翼摇滚运动的动稳定性,给出了动稳定性的判则以及失稳后的演化规律,指出当来流马赫数和雷诺数一定时,小攻角下是摇滚动稳定的,但大攻角出现Hopf分叉不稳定性。数值模拟和理论分析结论一致,与实验结果符合。
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| 关 键 词： | Hopf分叉 动态不稳定 高精度算法 数值模拟 |
| 文章编号： | 0258-1825（2006）01-0005-05 |
| 收稿时间： | 2005-01-04 |
| 修稿时间： | 2005-06-13 |
On the rocking motion and its dynamic evolution of a swept delta wing |
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| ZHANG Han-xin,LIU Wei,XIE Yu-fei,YE You-da.On the rocking motion and its dynamic evolution of a swept delta wing[J].Acta Aerodynamica Sinica,2006,24(1):5-9. |
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| Authors: | ZHANG Han-xin LIU Wei XIE Yu-fei YE You-da |
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| Institution: | China Aerodynamics Research and Develpment Center,Mianyang Sichuan 621000,China;National Laboratory for Computational Fluid Dynamics,Beijing,100083,China |
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| Abstract: | Theory of nonlinear dynamics and numerical simulation of coupled Navier-Stokes equations and flight mechanics equations are used to study and analyze the dynamic stability of the rocking motion of a swept delta wing. The judging criteria of dynamic stability and the evolution rule after destabilization are given.It is pointed out that with the Mach number and Reynolds number of free stream set,the rock motion is dynamically stable at low angles of attack,but dynamically unstable at high angles of attack and Hopf bifurcation occurs.Numerical Simulation agress with the conclusion of theoretical analysis,and also accords with the experimental results. |
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| Keywords: | Hopf bifurcation dynamic stability high-order algorithm numerical simulation |
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