| 后台阶分离再附湍流流动的实验研究 |
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| 引用本文： | 刘应征,朴英守,成亨镇. 后台阶分离再附湍流流动的实验研究[J]. 上海交通大学学报, 2005, 39(5): 810-812,817 |
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| 作者姓名： | 刘应征 朴英守 成亨镇 |
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| 作者单位： | 上海交通大学,机械与动力工程学院,上海,200030;韩国科学技术研究院,机械工程系,大田,韩国 |
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| 摘 要： | 采用激光粒子图像速度仪(PIV)对低速水槽中二维后台阶分离再附湍流流动进行了系统的实验研究．通过大量重复高空间分辨率瞬态速度场测量，获得了时均再附点位置和时均速度场．对实验结果进行统计分析得到了流向、法向速度分量的脉动场、雷诺应力场和展向涡量场，并给出了小涡结构配对、合并和大尺度相干旋涡结构形成过程中所出现的流动特征．
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| 关 键 词： | 湍流流动 分离再附流 粒子图像速度仪 后台阶 |
| 文章编号： | 1006-2467(2005)05-0810-03 |
Experimental Investigation on the Turbulent Separated and Reattaching Flow over Backward-Facing Step |
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| Liu Ying-zheng,PARK Young-soo,SUNG Hyung-jin. Experimental Investigation on the Turbulent Separated and Reattaching Flow over Backward-Facing Step[J]. Journal of Shanghai Jiaotong University, 2005, 39(5): 810-812,817 |
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| Authors: | Liu Ying-zheng PARK Young-soo SUNG Hyung-jin |
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| Affiliation: | LIU Ying-zheng~1,PARK Young-soo~2,SUNG Hyung-jin~2 |
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| Abstract: | Two-dimensional separated and reattaching turbulent flow over a backwark-facing step in a low-speed water channel was extensively investigated using Particle Image Velocimetry (PIV). Time-averaging reattaching position, velocity field and spanwise vorticity field were revealed. Turbulence intensity field and Reynolds stress field were delineated using statistical analysis based on a large number of measured velocity vector felds. Flow characteristics involved in amalgamations of small vertices and formation of large-scale coherent structures were disclosed. |
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| Keywords: | turbulent flow separated and reattaching turbulent flow particle image velocity (PIV) backward-facing step |
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