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论文:2015,Vol:33,Issue(3):382-387 |
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引用本文： |
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康伟, 代向艳, 刘凝. 低速翼型绕流的多模态耦合与流动稳定性研究[J]. 西北工业大学学报 |
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Kang Wei, Dai Xiangyan, Liu Ning. Multi-Modal Interaction and Flow Instability of Flow around an Airfoil at Low Reynolds Number[J]. Northwestern polytechnical university |
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| 低速翼型绕流的多模态耦合与流动稳定性研究 |
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| 康伟1, 代向艳2, 刘凝1 |
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1. 西北工业大学 航天学院, 陕西 西安 710072;
2. 空军工程大学 航空航天工程学院, 陕西 西安 710043 |
| 摘要: |
| 采用非线性动力学理论对翼型绕流的多模态耦合机制进行研究,并阐释模态耦合作用与流动稳定性的关系。通过特征线有限元方法对翼型绕流问题进行数值计算,建立非定常流场数据库。为了分析流动稳定性和流动特征,利用本征正交分解提取流场中的特征模态,从而分析翼型绕流非定常流场的特征模态之间的相互作用关系,并给出了非线性流体动力系统中的不同模态作用与流动稳定性的关系。 |
| 关键词:
翼型绕流
本征正交分解
非线性动力学
模态耦合
流动稳定性
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| Multi-Modal Interaction and Flow Instability of Flow around an Airfoil at Low Reynolds Number |
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| Kang Wei1, Dai Xiangyan2, Liu Ning1 |
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1. College of Astronautics, Northwestern Polytechincal University, Xi'an 710072, China;
2. School of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi'an 710043, China |
| Abstract: |
| Multi-mode interaction mechanism of flow around an airfoil is presented from viewpoint of nonlinear dynamics. The relationship between coupling effect and flow stability is studied. The flow around an airfoil is simulated using characteristics finite element method and then the database of unsteady flow field is established accordingly. In order to analyze flow stability and flow pattern, the dominant modes are extracted with Proper Orthogonal Decomposition. Furthermore, the interaction among the distinct modes of airfoil flow is analyzed, and the relationship between multi-mode interaction effect and flow instability in nonlinear fluid dynamic system is given. |
| Key words:
airfoils
angle of attack
computer simulation
dynamics
finite element method
flow fields
Hopf bifurcation
Navier-Stokes equations
stability
Taylor series
flow around an airfoil
flow stability
modal interaction
nonlinear dynamics
Proper Orthogonal Decomposition
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| 收稿日期: 2014-10-09
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(11402212)与中央高校基本科研业务费专项资金(3102014JCQ01002)资助 |
| 通讯作者:
Email： |
| 作者简介: 康伟(1983—),西北工业大学讲师,主要从事气动弹性与流动稳定性研究。
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| 作者相关文章 |
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| 康伟 在本刊中的所有文章 |
| 代向艳 在本刊中的所有文章 |
| 刘凝 在本刊中的所有文章 |
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