低雷诺数条件下并列三圆柱绕流的尾流模式和水动力系数研究

发布时间：2018-08-07 12:05

【摘要】：该文应用浸入边界法对雷诺数Re(28)100和间距比T/D(28)1.1-5.0条件下的等间距并列三圆柱绕流进行了数值模拟。研究发现,尾流模式与无量纲圆柱间距比T/D密切相关,在所研究的间距比范围内共出现六种尾流模式,分别为:单体尾流模式(T/D(28)1.1-1.2)、偏斜尾流模式(T/D(28)1.3)、第一类Flip-Flopping(FF1)尾流模式(T/D(28)1.4-1.5)、第二类Flip-Flopping(FF2)尾流模式(T/D(28)1.7-2.3)、同步尾流模式(T/D(28)2.5-3.2)和调制尾流模式(T/D(28)3.3-5.0)。通过分析近尾流的涡量图、升阻力系数时程曲线和不同圆柱所受升力的相位差,详细研究了各个尾流模式的特点和联系。
[Abstract]:In this paper, the numerical simulation of the flow around three circular cylinders with equal spacing under Reynolds number re (28) 100 and spacing ratio T / D (28) 1.1-5.0 is carried out by means of immersion boundary method. It is found that the wake mode is closely related to the dimensionless cylinder spacing ratio T / D, and there are six wake modes in the range of the studied spacing ratio. They are: single wake mode (T / D (28) 1.1-1.2), skew wake mode (T / D (28) 1.3), Flip-Flopping (FF1) wake mode (T / D (28) 1.4-1.5), Flip-Flopping (FF2) wake mode (TD / (28) 1.7-2.3), synchronous wake mode (T / D (28) 2.5-3.2) and modulated wake mode (T / R (28) 3.3-5.0). By analyzing the vorticity diagram of the near wake, the time history curve of the lift resistance coefficient and the phase difference of the lift force of different cylinders, the characteristics and relations of each wake model are studied in detail.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;
【基金】：国家自然科学基金创新研究群体科学基金(51321065);国家自然科学基金(51579715)资助项目~~
【分类号】：O357.5

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