| 突然起动圆柱的非定常绕流计算 |
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| 引用本文： | 陈则霖,杨超.突然起动圆柱的非定常绕流计算[J].空气动力学学报,1994,12(4):471-474. |
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| 作者姓名： | 陈则霖 杨超 |
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| 作者单位： | [1]北京空气动力研究所，北京100074 [2]北京航空航天大学， |
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| 摘 要： | 本文用分区方法定量模拟高Re数情况下突然起动圆柱的初期对称流动。绕圆柱的二维不可压流场可分为无粘区、附着粘性区和分离区。无粘区有解析解，用非定常层流边界层方程解附着粘性区，用离散涡方法处理随时间变化的分离区。试用了混合的Rankine和Lamb涡模型及二次离散涡。给出了Re=300、9500两个算例，基本符合有关实验结果。
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| 关 键 词： | 空气动力 边界层 非定常流动 圆柱 绕流 |
Caculation of Unsteady Flows past an Impulsively Started Cylinder |
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| Chen Zelin.Caculation of Unsteady Flows past an Impulsively Started Cylinder[J].Acta Aerodynamica Sinica,1994,12(4):471-474. |
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| Authors: | Chen Zelin |
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| Institution: | Chen Zelin(Beijing Institute of Aerodynamics)Yang Chao(Beijing University of Aeronautics and Astronautics) |
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| Abstract: | The initia1 symmetric flows around an impulsively started circular cylinder are simulated bv the zonal method in this paper.The two-dimensional imcompressible unsteady flow around cylinder is divided into inviscid,attached viscotis and separated zones.There is analytic sol-ution in the inviscid zone. The unsteady laminar boundary laycr equations are solved bV difference scheme in the attached viscous zone. The sepa-rated zone,varing with time,can be coped with discrete vortex method.The Rankine and Lamb vortex corc models are mixed,and the secondary dis-crete vortices are taken. The rcsults of sample at Re=3000, 9500 agree with available experiment. |
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| Keywords: | zonal method vortex method circular cylinder unsteady flow boundary layer |
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