| 两类非对称涡流动所诱导的摇滚运动 |
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| 作者姓名： | 邓学蓥 石伟 王延奎 杨家骥 |
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| 作者单位： | 北京航空航天大学 流体力学教育部重点实验室, 北京 100191 |
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| 摘 要： | 文章详细讨论了两类非对称涡流动诱发的模型摇滚运动.第1类是针对旋成体机身组合体模型, 其摇滚运动是由前体非对称涡流动诱发的, 运功形态呈现不确定性, 由模型头尖部的扰动触发形成.文章提出了快速旋转头尖部扰动的控制技术, 以抑制该类模型的大攻角摇滚运动.第2类是针对非常规机身的组合体模型, 其摇滚运动的主控流动是非常规机身和机翼的前缘分离涡流动, 这些流动是由组合体模型的边界条件确定的, 从而运动形态具有很好的确定性.所以, 这类模型的自由摇滚运动必须通过改变边界条件来改变诱发摇滚运动的流动, 以达到抑制模型自由摇滚运动的目的.最后, 文章还讨论了这类运动是由非对称的机翼涡涡强主控的.
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| 关 键 词： | 非对称涡 不稳定性 扰动 触发 边界条件 摇滚运动 |
| 收稿时间： | 2015-10-20 |
Wing Rock Motions Induced by Two Kinds of Asymmetric Vortices Flows |
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| Affiliation: | Ministry-of-Education Key Laboratory of Fluid Mechanics, BeiHang University, Beijing 100191, China |
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| Abstract: | Wing rock motions induced by two kinds of asymmetric vortices flows were discussed in detail. The first wing rock motion is induced by asymmetric vortices flow over forebody from the configuration of revolution body and low swept wing. This wing rock motion appears indeterminacy and it forms from disturbance trigging at forebody nose tip. In order to suppress the wing rock motion of model, a technique of rotating perturbation at nose tip of model was proposed. The second wing rock motion is induced by separation vortices flow over forebody and wing from the configuration of chined body and middle swept wing. This kind of wing rock motion is dominated by boundary condition of the model, and it is determinacy. Therefore, it should change boundary condition of the model to suppress this wing rock. Finally, this type of wing rock motion dominated by variation of vortex strength of the wing vortices was discussed. |
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