| 并列双圆柱绕流中宽窄尾流的识别方法 |
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| 引用本文： | 庞建华, 宗智, 周力, 邹丽. 并列双圆柱绕流中宽窄尾流的识别方法[J]. 中国舰船研究, 2016, 11(3): 37-42. DOI: 10.3969/j.issn.1673-3185.2016.03.007 |
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| 作者姓名： | 庞建华 宗智 周力 邹丽 |
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| 作者单位： | 1.1 大连理工大学 船舶工程学院, 辽宁 大连 116024 |
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| 基金项目： | 国家自然科学基金资助项目(51279030);工业和信息化部高技术船舶专项基金资助项目 |
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| 摘 要： | 采用基于边界瞬时涡量守恒(IVCBC)的纯拉格朗日涡方法,结合并列双圆柱的结构特点,建立双圆柱绕流数值计算模型。在间隙率T/D=1.1~2.6时,并列双圆柱绕流会出现宽尾流(WW)和窄尾流(NW)现象。利用两圆柱间隙中心点的诱导速度方向与间隙流的偏转方向同步的特性,提出一种区别宽、窄尾流的数值计算方法;比较间隙流的偏转方向与该间隙中点的速度偏转方向,并进行典型的算例分析。结果表明:该方法能准确区别宽尾流和窄尾流,可为数值研究这一特殊区域的流体特征提供重要的数值计算方法。
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| 关 键 词： | 边界瞬时涡量守恒 并列双圆柱 宽尾流 窄尾流 高雷诺数 |
| 收稿时间： | 2016-01-19 |
A method for distinguishing WW and NW in the flow around two side by side circular cylinders |
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| PANG Jianhua, ZONG Zhi, ZHOU Li, ZOU Li. A method for distinguishing WW and NW in the flow around two side by side circular cylinders[J]. Chinese Journal of Ship Research, 2016, 11(3): 37-42. DOI: 10.3969/j.issn.1673-3185.2016.03.007 |
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| Authors: | PANG Jianhua ZONG Zhi ZHOU Li ZOU Li |
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| Affiliation: | 1.1 School of Naval Architecture Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | A pure-Lagrangian vortex method, based on Instantaneous Vorticity Conserved Boundary Conditions (IVCBC), is adopted to build the numerical calculation model of flow around double circular cylinders that have the same structure characteristics of two side by side circular cylinders. The Wide Wake (WW)and Narrow Wake(NW) appear in the range of pitch ratio T/D=1.1~2.6. A scheme is proposed to distinguish the NW and WW through the direction synchronism between induced velocity at the middle of double circular cylinders and deflection of gap flow. By comparing the directions of the above two flowing conditions and analyzing the classic case, it is concluded that the proposed method could distinguish WW and NW accurately, which offers an important numerical calculation method for investigating the flow characteristics in this range. |
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| Keywords: | Instantaneous Vorticity Conserved Boundary Condition(IVCBC) side by side circular cylinders Wide Wake(WW) Narrow Wake(NW) high Reynolds number |
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