| 输气管内壁仿生减阻大涡模拟 |
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| 引用本文： | 李闯,巴梁,王国付,杜胜男,王卫强. 输气管内壁仿生减阻大涡模拟[J]. 辽宁石油化工大学学报, 2019, 39(5): 59. DOI: 10.3969/j.issn.1672-6952.2019.05.011 |
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| 作者姓名： | 李闯 巴梁 王国付 杜胜男 王卫强 |
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| 作者单位： | （辽宁石油化工大学 石油天然气工程学院，辽宁 抚顺 113001） |
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| 基金项目： | 辽宁省科技厅项目"三维数字油库风险防控与应急响应系统构效" |
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| 摘 要： | 流向的微小沟槽表面能有效降低壁面摩阻，降低输送能耗。针对内表面有三角形肋条的输气管道，采用大涡模拟对不同流动状态进行模拟，分析了流场速度矢量图、均方根速度剖面线和雷诺切应力。结果表明，肋条无量纲尺寸s＋＝20.7时肋条的减阻效果最好；湍流形成的涡经过肋条时被肋峰切开在肋条中形成小的反向小涡，将流体与壁面之间的滑动摩擦转变为滚动摩擦，降低摩擦阻力；光滑管壁、肋条的肋峰和谷底表面的速度剖面线只有在壁面附近差别较大，在远离壁面处趋于一致，肋条对流场的影响主要发生在近壁区。
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| 关 键 词： | 肋条减阻 大涡模拟 二次涡 无量纲尺寸 |
| 收稿时间： | 2018-10-15 |
Large Eddy Simulation of Bionic Drag Reduction of Gas Pipe Inner Wall |
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| Li Chuang,Ba Liang,Wang Guofu,Du Shengnan,Wang Weiqiang. Large Eddy Simulation of Bionic Drag Reduction of Gas Pipe Inner Wall[J]. Journal of Liaoning University of Petroleum & Chemical Technology, 2019, 39(5): 59. DOI: 10.3969/j.issn.1672-6952.2019.05.011 |
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| Authors: | Li Chuang Ba Liang Wang Guofu Du Shengnan Wang Weiqiang |
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| Affiliation: | （College of Petroleum Engineering，Liaoning Shihua University，Fushun Liaoning 113001，China） |
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| Abstract: | The small groove surface flowing in the direction can effectively reduce the wall friction and reduce the energy consumption of transportation. For the gas pipeline with triangular ribs on the inner surface, the large eddy simulation is used to simulate different flow states, and the flow field velocity vector diagram, root mean square velocity profile line and Reynolds shear stress are analyzed. The simulation results show that the best drag reduction effect is achieved when the dimensionless dimension s+=20.7; the vortex formed by the turbulence is cut by the rib peak when passing through the rib to form a small reverse small vortex in the rib, and the fluid is the sliding friction between the wall surfaces which is converted into rolling friction, which reduces the frictional resistance; the velocity profiles of smooth tube wall, rib peak and valley bottom surface only differ greatly near the wall surface, and tend to be consistent far from the wall surface, and the rib pair the influence of the flow field mainly occurs in the near wall area. |
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| Keywords: | Rib drag reduction Large eddy simulation Secondary vortex Dimensionless size |
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