| 来流扰动对圆盘绕流结构影响的实验研究 |
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| 引用本文： | 王晋军,高磊,潘翀.来流扰动对圆盘绕流结构影响的实验研究[J].空气动力学学报,2008,26(4). |
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| 作者姓名： | 王晋军 高磊 潘翀 |
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| 作者单位： | 北京航空航天大学流体力学研究所,北京,100191 |
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| 基金项目： | 国家自然科学基金
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国家杰出青年科学基金
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| 摘 要： | 主要讨论由水槽流动显示实验得到的圆盘绕流结构在上游小圆柱尾迹干扰下的变化,对圆盘前驻点附近逆压区的流动通过氢气泡显示技术进行观察.由实验结果处理得到圆盘前大涡的结构特征(如周期、最大宽度、在周期内结构随时间的变化等)受扰动几何参数的影响.发现无量纲参数L/d(L为小圆柱中心与圆盘迎风面之间的间距,d为小圆柱直径)对圆盘前驻点区域中大涡的形成和发展有重要的影响.圆柱尾迹中涡通量的增加会在圆盘前产生大尺度的涡对,其周期性演化的频率随L/d增加而增加.
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| 关 键 词： | 圆柱绕流 圆盘绕流 干扰 流动显示 |
Experimental study on effects of upstream interference on the flow structure around a disk |
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| WANG Jin-jun,GAO Lei,PAN Chong.Experimental study on effects of upstream interference on the flow structure around a disk[J].Acta Aerodynamica Sinica,2008,26(4). |
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| Authors: | WANG Jin-jun GAO Lei PAN Chong |
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| Institution: | WANG Jin-jun,GAO Lei,PAN Chong(Institute of Fluid Mechanics,Beijing University of Aeronautics , Astronautics,Beijing 100083,China) |
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| Abstract: | The present work primarily discusses the flow structure around a disk interfering by a fine circular cylinder placed upstream through hydrogen bubble visualization,with focus on the flow in the front stagnation region of the disk.The experimental results revealed the effect of the arrangement of the circular cylinder on the characteristics of the large vortex in front of the disk,such as period,maximum width and evolvement in a specific period.It is shown that the non-dimensional parameter L/d(L is the dist... |
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| Keywords: | flow around a circular cylinder flow around a disk interference flow visualization |
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