| 后台阶流中自由旋涡的稳定性 |
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| 引用本文： | 黄明恪.后台阶流中自由旋涡的稳定性[J].实验流体力学,1999,13(3):2. |
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| 作者姓名： | 黄明恪 |
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| 作者单位： | 南京航空航天大学空气动力学系,江苏,南京,210016 |
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| 摘 要： | 最近的实验表明用侧壁小孔抽吸可在后台阶流中捕捉到静止的分离旋涡。笔者将用理论证明，二维后台阶流中存在自由旋涡的驻定态位置，并且有中性的驻定态稳定性。还进一步证明，用侧壁小孔抽吸，可使自由涡达到真正的驻定态稳定
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| 关 键 词： | 分离旋涡 稳定性 不可压流 位流 |
| 修稿时间： | 1998-12-25 |
Stationary stability of free vortex in the flow over the backward-facing step |
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| HUANG Ming-ke.Stationary stability of free vortex in the flow over the backward-facing step[J].Experiments and Measur in Fluid Mechanics,1999,13(3):2. |
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| Authors: | HUANG Ming-ke |
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| Institution: | (Dep.of Aero., Nanjing University
of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | The ability of the free vortex trapping is investigated downstream of a backward facing step in potential flow theory.It was found that there exits a stationary position of the free vortex downstream of the step,and the free vortex there is stable.More precisely,it is only neutral stable.To enhance the stability of the free vortex,the effects of the suction applied through the oriffice on side walls were examined.A linearized theory was developed to show that the stationary vortex becomes really stable if the suction is applied. |
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| Keywords: | seperation vortex stability incompressible flow potential flow |
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