绕流圆柱的自由表面磁流体流动实验

韩东; 黄护林; 张炎; 李辉

绕流圆柱的自由表面磁流体流动实验

1.
南京航空航天大学能源与动力学院, 南京 210016
2.
南京航空航天大学高新技术研究院, 南京 210016

基金项目: 国家自然科学基金资助项目(50306006)

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出版历程
- 收稿日期: 2007-01-19
- 修回日期: 2007-09-26
- 刊出日期: 2008-02-28

Experimental investigation of free surface MHD flow around a cylinder

1.
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
Academy of Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 利用PIV(Particle image velocimetry)光学测量系统,在雷诺数分别为7 767和11 60时,实验研究了磁场对绕流圆柱的自由表面流动的影响.实验研究结果表明,磁场使边界层内的无量纲平均速度分布偏离对数分布,尾迹变窄变短,分离点向后移;当雷诺数增加到11 60时,在相同磁场强度作用下,磁场的影响减弱,从而使边界层内的无量纲平均速度分布偏离对数分布的程度减小.
- 航空、航天推进系统 /
- 磁流体流 /
- 自由表面 /
- 尾迹 /
- 边界层 /
- 无量纲平均速度分布
Abstract: The effects of magnetic field on the free surface flow around a cylinder were investigated experimentally using the PIV(particle image velocimetry) under Reynolds number 7767 and 11650.The experimental result revealed that the field enabled the distribution of nondimensional average velocity to deviate from logarithmic distribution of nondimensional average velocity in the boundary layer,and also made the wake become narrower and shorter,and the detachment point move backward.When the Reynolds's number reached up to 11650,the influence of magnetic field was weaken under same strength of external magnetic field.Consequently,the departure degree between the nondimensional average velocity distribution and logarithmic distribution in the boundary layer was reduced.
- aerospace propulsion system /
- magnetohydrodynamic(MHD) flow /
- free surface /
- wake /
- boundary layer /
- distribution of nondimensional average velocity

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参考文献(9)

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