| 汪健生,徐亚坤.带有柔性薄板三维方柱流固耦合的数值模拟研究[J].计算力学学报,2017,34(1):117~122,129 |
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| 带有柔性薄板三维方柱流固耦合的数值模拟研究 |
| Simulations of flow past a square cylinder with a flexible plate based on fluid-solid coupling method |
| 投稿时间：2015-08-02 修订日期：2015-12-10 |
| DOI：10.7511/jslx201701017 |
| 中文关键词: 流固耦合 柔性薄板 阻力系数 升力系数 斯特劳哈尔数 |
| 英文关键词:fluid-structure interaction a flexible plate the drag coefficient the rms of lift coefficient St number |
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| 中文摘要: |
| 采用双向流固耦合方法，对带有柔性薄板三维方柱的流场变化特性进行了研究。通过对比单方柱，分析了带有柔性薄板三维方柱阻力系数、升力系数以及斯特劳哈尔数的变化规律。研究表明，在方柱尾流区域附加一柔性薄板可以使其阻力系数降低34.6%，同时其变化幅值大大减小；其升力系数的均方根减小84.8%，流场脉动大幅度减小；斯特劳哈尔数降低79.5%。研究结果表明，在三维方柱后设置柔性薄板可有效抑制涡脱落，从而改善三维方柱的尾流特性。 |
| 英文摘要: |
| The investigation of flow features on the three-dimensional square cylinder with a flexible plate is performed by the two way fluid-solid coupling method.The variation law of the drag coefficient,lift coefficient and Strouhal number of the square cylinder with a flexible plate are probed,which are compared with that of the single square cylinder.The numerical results show that the drag coefficient of the square cylinder reduces by 34.6% and its amplitude decreases greatly by adding a flexible plate in the region of the wake flow.Meantime,the RMS of the lift coefficient of square cylinder with a flexible plate reduces by 84.8% accompanying the drastic decrease of flow field pulsation.In addition,the Strouhal number reduces by 79.5%.The present results indicate that the vortex shedding can be effectively suppressed by adding a flexible plate at the back of the square cylinder,which results in the improvement of the wake flow characteristics of three-dimensional square cylinder. |
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