| 应用PIV研究二维后向台阶起动涡流动结构特性 |
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| 引用本文： | 马广云,申功炘.应用PIV研究二维后向台阶起动涡流动结构特性[J].航空学报,1996,17(3):257-264. |
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| 作者姓名： | 马广云 申功炘 |
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| 作者单位： | 北京航空航天大学流体力学研究所!北京，100083，北京航空航天大学流体力学研究所!北京，100083 |
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| 摘 要： | 采用适合于低速水流的白光气泡 PIV技术以及氢泡时间线流动显示技术在水槽中对绕二维后向台阶的起动涡瞬时速度场、涡量场进行了定量测量和流谱观察。得到了起动涡涡量的最大值、总环量、涡的尺度及涡心位置随时间变化的特性曲线 ;并观察到起动涡发展的 4个阶段
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| 关 键 词： | 后向断阶 旋涡 流动测量 |
INVESTIGATION ON THE PROPERTIES AND STRUCTURES OF STARTING VORTEX FLOW AROUND 2-D BACKWARD-STEP BY PIV |
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| Ma Guangyun,Shen Gongxin.INVESTIGATION ON THE PROPERTIES AND STRUCTURES OF STARTING VORTEX FLOW AROUND 2-D BACKWARD-STEP BY PIV[J].Acta Aeronautica et Astronautica Sinica,1996,17(3):257-264. |
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| Authors: | Ma Guangyun Shen Gongxin |
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| Institution: | Fluid Mechanics Institute, Beijing University of Aeronautics and Astronautics, Beijin,100083 |
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| Abstract: | Experimental investigation on the starting vortex flow around a 2 D backward step was held in a water channel. The properties and structures of the starting vortex flow were investigated by qualitative flow visualization using hydrogen bubble time line technique and by quantitative velocity and vorticity measurement using PIV——White Light Bubble Image Velocimetry. Some invariant properties and 4 stage structures of the starting vortex flow were observed. |
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| Keywords: | backward facing steps vortices flow measurement |
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