| 弹性管的紊流减阻效果与流激振动特性的实验研究 |
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| 引用本文： | 蔡书鹏,唐川林,李大美.弹性管的紊流减阻效果与流激振动特性的实验研究[J].水利与建筑工程学报,2005,3(3):4-7. |
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| 作者姓名： | 蔡书鹏 唐川林 李大美 |
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| 作者单位： | 株洲工学院高压水射所,湖南,株洲,412008;武汉大学水利水电学院,湖北,武汉,430072;株洲工学院高压水射所,湖南,株洲,412008;武汉大学水利水电学院,湖北,武汉,430072 |
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| 摘 要： | 在实验确认弹性管确有紊流减阻效果的基础上,对其流激振动特性及紊流减阻效果进行了实验研究。结果表明:管的壁厚越小,管外壁的流激振动的脉动位移有效值越大,紊流减阻效果越好;在雷诺数Re约为2×104时,壁厚为2mm、3mm及4mm弹性管的流激振动减阻率依次约为12%、10%、8%。
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| 关 键 词： | 弹性管 脉动位移 流激振动 紊流减阻 |
| 文章编号： | 1672-1144(2005)03-0004-04 |
| 修稿时间： | 2005年4月22日 |
Experimental Study on Effect of Turbulent Drag Reduction and Character of Flow-excited Vibration for Flexible Tubes |
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| CAI Shu-peng,TANG Chuan-lin,LI Da-mei.Experimental Study on Effect of Turbulent Drag Reduction and Character of Flow-excited Vibration for Flexible Tubes[J].Journal of Water Resources Architectural Engineering,2005,3(3):4-7. |
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| Authors: | CAI Shu-peng TANG Chuan-lin LI Da-mei |
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| Abstract: | Based on there existing the effect of turbulent drag reduction in flexible tubes examined by experiment, the experimental investigation was performed on effect of turbulent drag reduction and character of flow-excited vibration. The results were found as follows: the thinner the flexible tubes, the bigger the root mean square of fluctuating displacement at the outer wall of the tubes, and the better the effect of turbulent drag reduction. The rates of drag reduction of the flexible tubes with thickness of 2 mm, 3 mm, 4 mm, are about 12%, 10%, 8% at the above Reynolds number of 20000. |
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| Keywords: | flexible tube fluctuating displacement flow-excited vibration turbulent drag reduction |
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