| 旋涡破裂引起的流动非定常特性 |
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| 引用本文： | 葛立新,李椿萱.旋涡破裂引起的流动非定常特性[J].航空学报,1998,19(5):553-555. |
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| 作者姓名： | 葛立新 李椿萱 |
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| 作者单位： | 1. 北京应用物理与计算数学研究所计算物理实验室, 北京, 100088;2. 北京航空航天大学国家计算流体动力学实验室, 北京, 100083 |
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| 摘 要： | 采用隐式近似因子分解法，通过求解三维、非定常、可压缩完全层流N-S方程，对绕大后掠三角翼旋涡破裂的流场进行了数值模拟。结果表明：当三角翼背风区流场发生旋涡破裂时，各流动参变量是非定常的，同时旋涡破裂点的位置沿轴向在一定范围内前后摆动。
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| 关 键 词： | 旋涡破裂 回流区 破裂点 |
| 收稿时间： | 1997-12-01 |
| 修稿时间： | 1998-02-25 |
UNSTEADY CHARACTER OF VORTEX BREAKDOWN FLOW FIELDS |
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| Ge Lixin,Li Chunxuan.UNSTEADY CHARACTER OF VORTEX BREAKDOWN FLOW FIELDS[J].Acta Aeronautica et Astronautica Sinica,1998,19(5):553-555. |
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| Authors: | Ge Lixin Li Chunxuan |
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| Institution: | 1. The Laboratory of Computational Physics, The Institute of Applied Physis and Computational Mathematics, Beijing, 100088;2. The State lab. of CFD, Beijing University of Aeronautics and Astronautics, Beijing, 100083 |
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| Abstract: | The software of solving the three dimensional, compressible, fully laminar Navier Stokes equations is made by utilizing the implicit solver based on the Beam Warming algorithm. The numerical results of the flow field over delta wings are obtained by using this software. Unsteadiness of various parameters in vortex breakdown flow fields is discovered, together with the axial fluctuation of the breakdown point, which characterizes the unsteady nature of the flowfield. |
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| Keywords: | vortex breakdown recycle region breakdown point |
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