| 黄立浦,王军雷.微细三角柱流固耦合动态特性的三维数值研究[J].计算力学学报,2015,32(4):571~578 |
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| 微细三角柱流固耦合动态特性的三维数值研究 |
| Three-dimensional dynamic characteristics of fluid-structure interaction in air flowing around tiny triangular prism using numerical method |
| 投稿时间：2014-04-23 修订日期：2014-08-25 |
| DOI：10.7511/jslx201504021 |
| 中文关键词: 三维 双向流固耦合 涡激振动 动网格 拍 |
| 英文关键词:triangular prism three dimensional vortex induced vibration two way fluid-solid interaction dynamic mesh model |
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| 中文摘要: |
| 在三维双向流固耦合计算基础上使用动网格方法,通过求解不可压缩粘性流体的 N-S 方程,数值研究了低速流速下(2.5 m/s~15 m/s)气体绕流微细三角钝体的耦合动态特性及涡激振动特性,得到了运动微细三角柱的升力系数、涡脱频率和振动振幅.观测到了微细三角柱的"锁振"和"拍"现象.接着计算了相同流场条件下的相同尺寸二维三角柱双向流固耦合涡激振动,并将结果与文献及本文中三维模型进行对比发现,三维模型的升力系数的平均幅值、涡脱频率和斯特劳哈尔数较之本文及文献中的二维数值模型较小. |
| 英文摘要: |
| The characteristics of fluid-solid interaction under low flow velocity(2.5 m/s~15 m/s)was numerically simulated by dynamic mesh model basing on three dimensional-two way coupling method.The present paper discussed characteristic values of lift coefficient,frequency of vortex shedding and the ampitude of the cylinder.The phenomenon of "lock-in" and "beat" was captured.The VIV of two-dimensional of fluid-solid interaction of triangular prism was discussed in this paper,the result was compared to the three dimensional model in this paper.The results showed that the amplitude of lift coefficient,frequency of vortex shedding and strouhal number of three-dimensional model is lower than those of the two dimensional. |
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