| N-S方程数值模拟弹体不可压脱体涡绕流 |
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| 引用本文： | 蔡晋生.N-S方程数值模拟弹体不可压脱体涡绕流[J].航空学报,1996,17(4):443-447. |
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| 作者姓名： | 蔡晋生 |
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| 作者单位： | 西北工业大学802教研室,西安,710072 |
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| 摘 要： | 应用在连续方程中增加压力对时间导数项的拟压缩性方法 ,数值求解三维定常不可压N- S方程。采用隐式 Beam- Warming近似因式分解格式求解。以修正的 Baldwin- Lomax代数模型模拟湍流流动。对绕正切拱形旋成柱体的大迎角脱体涡流动进行了数值模拟 ,并分析了层流粘性和湍流粘性对脱体涡及二次分离涡的影响。在头部施加微小的非对称射流扰动可得到与实验相符的非对称脱体涡
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| 收稿时间： | 1994-11-18; |
| 修稿时间： | 1995-10-16 |
N-S EQUATION SOLUTIONS FOR INCOMPRESSIBLE VORTICAL FLOWS OVER A TANGENT-OGIVE-CYLINDER |
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| Cai Jinsheng.N-S EQUATION SOLUTIONS FOR INCOMPRESSIBLE VORTICAL FLOWS OVER A TANGENT-OGIVE-CYLINDER[J].Acta Aeronautica et Astronautica Sinica,1996,17(4):443-447. |
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| Authors: | Cai Jinsheng |
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| Institution: | Faculty 802,Northwestern Polytechnical University,Xi’an,710072) |
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| Abstract: | The method of pseudocompressibility in which a time derivative pressure term is introduced into the mass conservation equation has been used for numerically solving the three dimensional steady incompressible Navier Stokes equations. The solution procedure employs Beam Warming implicit approximate factorization scheme. The modified Baldwin Lomax algebraic turbulent model is used to numerically simulate high incidence vortical flows about a tangent ogive cylinder. The numerical results are in good agreement with experiment. To reproduce the experimentally observed asymmetric vortices, it was found essential to introduce a small asymmetric jet disturbance near the body apex. |
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| Keywords: | incompressible flow Navier Stokes equation rotating bodies separated flow numerical flow visualization |
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