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篇目详细内容 |
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【篇名】 |
Investigation of vortical flows over oscillating body using fast Lagrangian vortex method |
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【刊名】 |
Frontiers of Energy and Power Engineering in China |
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【刊名缩写】 |
Front. Energy Power Eng. China |
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【ISSN】 |
1673-7393 |
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【EISSN】 |
1673-7504 |
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【DOI】 |
10.1007/s11708-009-0010-4 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2009 |
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【卷期】 |
3
卷3期 |
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【页码】 |
297-306
页,共
10
页 |
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【作者】 |
Baoshan ZHU;
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【关键词】 |
unsteady vortical flows; fast vortex method; vortex shedding; rotational oscillation; thin cambered blade |
【摘要】 |
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A computational method facilitating long-time and high-resolution unsteady vortical flows is developed with the advantages of the discrete vortex methods. Both the velocity and pressure distribution of the flow field are calculated by integral formulations in combination with a fast summation algorithm. The vorticity field is described by Lagrangian representation, which is well suited to the moving boundary. Viscosity diffusion of the vorticity is considered with the core spreading model corrected by an adaptive splitting and merging algorithm. The effectiveness of the present method is examined by comparing the numerical results of unsteady separated flows which pass a cylinder and a thin cambered blade undergoing rotational oscillations with available experimental results. Interesting results about vortex shedding patterns and lock-in characteristics are provided for the thin cambered blade. |
