| 雷诺数对沟槽减阻特性影响的数值分析 |
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| 引用本文： | 刘志华,董文才,熊鹰.雷诺数对沟槽减阻特性影响的数值分析[J].海军工程大学学报,2007,19(2):6-11. |
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| 作者姓名： | 刘志华 董文才 熊鹰 |
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| 作者单位： | 1. 海军工程大学,船舶与动力学院,武汉,430033
2. 海军工程大学,船舶与动力学院,武汉,430033;中国舰船研究设计中心,武汉,430064 |
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| 摘 要： | 采用雷诺平均N-S方程和RNGk-ε湍流模型计算V型沟槽面的湍流边界层流动和黏性阻力,通过改变来流速度大小和沟槽面布置位置,研究了雷诺数对沟槽减阻特性的影响规律。计算结果表明,来流速度对沟槽减阻率的影响很大,对于一种尺度的V型沟槽,存在着一个具有较好减阻效果的来流速度范围,最大减阻率可达8.6%;沟槽面在沿来流方向上的布置位置对其减阻效果的影响则非常小。
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| 关 键 词： | V型沟槽 雷诺数 减阻 湍流应力 |
| 文章编号： | 1009-3486(2007)02-0006-06 |
| 修稿时间： | 2006年10月10 |
Numerical analysis of the effect of Reynolds number on drag reduction by grooved surface |
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| LIU Zhi-hua,DONG Wen-cai,XIONG Ying.Numerical analysis of the effect of Reynolds number on drag reduction by grooved surface[J].Journal of Naval University of Engineering,2007,19(2):6-11. |
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| Authors: | LIU Zhi-hua DONG Wen-cai XIONG Ying |
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| Abstract: | The flow in turbulent boundary layer and the viscous drag over V-groove surface are numerically simulated by using the RANS formula and RNG-turbulence model.The effect of Reynolds Number on the drag reduction is studied by changing the flow velocities and the locations of the groove surface.It is shown that the flow velocity has a great influence on the ratio of drag reduction and the favorable flow velocity range is related to a certain groove dimension,in which the maximum ratio of drag reduction,8.6%,can be obtained,but the locations where the groove surface is set along the flow direction have very little influence on the ratio of drag reduction. |
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| Keywords: | V-groove Reynolds number drag reduction turbulent stress |
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