| 槽道湍流展向振荡电磁力减阻的机理研究 |
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| 引用本文： | 梅栋杰,范宝春,陈耀慧,叶经方.槽道湍流展向振荡电磁力减阻的机理研究[J].力学学报,2011,43(4):653-659. |
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| 作者姓名： | 梅栋杰 范宝春 陈耀慧 叶经方 |
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| 作者单位： | 南京理工大学瞬态物理重点实验室 |
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| 摘 要： | 对槽道湍流的展向振荡电磁力控制进行了实验和数值研究. 实验通过PIV系统和浮动床阻力测试系统记录近壁区的条带变化和壁面阻力变化. 计算时, 利用谱方法直接模拟电磁力控制下的近壁流场. 实验和计算结果定性一致, 皆表明展向振荡电磁力可以减少壁面阻力, 并使条带倾斜. 计算结果还进一步揭示了电磁力减阻的机理. 电磁力诱导产生的流向涡与壁湍流的相互作用, 在近壁处形成负的脉动展向涡, 该涡将导致流向涡的倾斜和振荡, 从而抑制湍流, 减少壁面阻力.
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| 关 键 词： | 数值模拟 |
| 收稿时间： | 2010-05-13 |
| 修稿时间： | 2011-01-27 |
MECHANISM OF DRAG REDUCTION BY SPANWISE OSCILLATING LORENTZ FORCE IN TURBULENT CHANNEL FLOW |
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| Mei Dongjie Fan Baochun Chen Yaohui Ye Jingfang.MECHANISM OF DRAG REDUCTION BY SPANWISE OSCILLATING LORENTZ FORCE IN TURBULENT CHANNEL FLOW[J].chinese journal of theoretical and applied mechanics,2011,43(4):653-659. |
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| Authors: | Mei Dongjie Fan Baochun Chen Yaohui Ye Jingfang |
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| Institution: | Science and Technology on Transient Physics Laboratory, Nanjing University of Science and Technology, Nanjing 210094, China |
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| Abstract: | Numerical simulations and experiment research are both carried out to investigate the control of spanwise oscillating Lorentz forces on a turbulent channel flow.The variation of the streaks and the skin friction drag are obtained through the PIV system and the drag measurement system,respectively.The flow field in the near-wall region is shown through direct numerical simulations utilizing spectral method.The experiment results are consistent with the numerical simulation ones qualitatively,and both indicat... |
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| Keywords: | spanwise oscillating Lorentz force turbulent channel flow mechanism of drag reduction numerical simulation |
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