[1]赵朋龙,陈耀慧,董 刚,等.基于本征正交分解的湍流边界层中条带结构实验研究[J].南京理工大学学报(自然科学版),2019,43(06):752-758.[doi:10.14177/j.cnki.32-1397n.2019.43.06.012]
 Zhao Penglong,Chen Yaohui,Dong Gang,et al.Experimental study on streaky structures in turbulentboundary layer based on POD[J].Journal of Nanjing University of Science and Technology,2019,43(06):752-758.[doi:10.14177/j.cnki.32-1397n.2019.43.06.012]
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基于本征正交分解的湍流边界层中条带结构实验研究()
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
43卷
期数:
2019年06期
页码:
752-758
栏目:
出版日期:
2019-12-31

文章信息/Info

Title:
Experimental study on streaky structures in turbulentboundary layer based on POD
文章编号:
1005-9830(2019)06-0752-07
作者:
赵朋龙陈耀慧董 刚刘怡昕
南京理工大学 瞬态物理国家重点实验室,江苏 南京 210094
Author(s):
Zhao PenglongChen YaohuiDong GangLiu Yixin
National Key Laboratory of Transient Physics,Nanjing University of Science andTechnology,Nanjing 210094,China
关键词:
本征正交分解 湍流边界层 条带结构 粒子图像测速 变形 旋转
Keywords:
proper orthogonal decomposition turbulent boundary layer streaky structure particle image velocimetry deformation rotation
分类号:
O352
DOI:
10.14177/j.cnki.32-1397n.2019.43.06.012
摘要:
为研究近壁湍流边界层中不同尺度条带结构在流向-展向平面内的演化规律,该文在低速循环水洞中利用粒子图像测速(PIV)技术,对Reτ=518时不同法向高度平面的流场进行了实验研究。该文利用本征正交分解(POD)方法提取流动中不同尺度的条带结构,并通过Okubo-Weiss函数研究流体单元的变形和旋转。研究结果表明:低阶模态包含的条带结构尺度大、含能高、条带间距较大,高阶模态包含的条带结构尺度小、含能低、条带间距较小; 不同模态的流动结构中,流体质点的变形和旋转分布规律具有相似性,存在变形的区域同时存在着旋转,同时流体质点的变形强度大于旋转; 随着模态数和壁面法向高度的增加,流体质点的变形和旋转均有所增强,且变形增加得更为显著。
Abstract:
In order to analyze the evolution of the different scales longitudinal streaky structures in the near wall turbulent boundary layer,the flow fields in the streamwise-spanwise planes corresponding to different wall-normal heights are experimentally studied by using particle image velocimetry(PIV)technique in a low speed circulating water tunnel at Reτ=518. The proper orthogonal decomposition(POD)method is employed to analyze the streaky structures of different scales. The deformation and the rotation motions of the fluid are studied through the Okubo-Weiss function. The results show that the scales of streaky structures in the leading order modes are large,which contain a relatively high energy fraction. With the increasing of the POD modes,the scales of streaky structures are decreasing,as well as the energy fraction. The space between the streaks of the large scales is larger than that of the small scales. There exists a similarity between the distributions of the deformation and the rotation of the fluid in the flow structure of different POD modes which indicates that where there exists a strong deformation,there exists a strong rotation in the fluid. At the same time,the intensity of the deformation of the fluid is stronger than that of rotation. With the increasing of the POD modes and the wall-normal height,both of the motions of deformation and the rotation increase and the variation for the deformation is more obvious than that for the rotation.

参考文献/References:

[1] 刘怡昕. 关于兵器科学与技术学科发展的思考[J]. 南京理工大学学报,2017,41(5):545-549.
Liu Yixin. Analysis on development of subject of armament science and technology[J]. Journal of Nanjing University of Science and Technology,2017,41(5):545-549.
[2]李泊,陈诚. 基于类鱼行为搜寻策略的水下传感器布置[J]. 南京理工大学学报,2019,43(2):244-249.
Li Bo,Chen Cheng. Fish-action hunt policy for underwater sensor deployment[J]. Journal of Nanjing University of Science and Technology,2019,43(2):244-249.
[3]黄乐萍,范宝春,董刚. 槽道湍流壁面展向周期振动减阻机理研究[J]. 南京理工大学学报,2010,34(3):361-366.
Huang Leping,Fan Baochun,Dong Gang. Mechanism of drag reduction due to spanwise wall oscillation in turbulent channel flow[J]. Journal of Nanjing University of Science and Technology,2010,34(3):361-366.
[4]黄乐萍,范宝春,梅栋杰,等. 变形壁面湍流流场的谱方法[J]. 南京理工大学学报,2012,36(2):245-249.
Huang Leping,Fan Baochun,Mei Dongjie,et al. Spectral methods for simulation of deformed wall turbulence flow[J]. Journal of Nanjing University of Science and Technology,2012,36(2):245-249.
[5]Li Jian,Dong Gang,Zhang Jianlei. Numerical study of evolution for subharmonic varicose low-speed streaks in turbulent channel flow[J]. Applied Mathematics and Mechanics,2016,37(3):325-340.
[6]Kline S J,Reynolds W C,Schraub F A,et al. The structure of turbulent boundary layers[J]. Journal of Fluid Mechanics,1967,30(4):741-773.
[7]Deng Sichao,Pan Chong,Wang Jinjun,et al. POD analysis of the instability mode of a low-speed streak in a laminar boundary layer[J]. Acta Mechanica Sinica,2017,33(6):981-991.
[8]Asai M,Minagawa M,Nishioka M. The instability and breakdown of a near-wall low-speed streak[J]. Journal of Fluid Mechanics,2002,455(25):289-314.
[9]李健,董刚,黄乐萍,等. 壁湍流低速条带失稳和再生的数值研究[J]. 南京理工大学学报,2012,36(2):278-284.
Li Jian,Dong Gang,Huang Leping,et al. Numerical simulation on instability and regeneration of low-speed streak in wall-bounded turbulence[J]. Journal of Nanjing University of Science and Technology,2012,36(2):278-284.
[10]Skote M,Haritonidis J H,Henningson D S. Varicose instabilities in turbulent boundary layer[J]. Physics of Fluids,2002,14(7):2309-2323.
[11]Bai Honglei,Zhou Yu,Zhang W G,et al. Streamwise vortices and velocity streaks in a locally drag-reduced turbulent boundary layer[J]. Flow Turbulence Combust,2018,100(2):391-416.
[12]张辉,范宝春,陈志华. 电磁力控制下圆柱绕流的涡度拟能[J]. 应用数学和力学,2008,29(11):1365-1375.
Zhang Hui,Fan Baochun,Chen Zhihua. Evolution of global enstrophy in cylinder wake controlled by Lorentz force[J]. Applied Mathematics and Mechanics,2008,29(11):1365-1375.
[13]刘震雄,竺晓程,杜朝辉. 跨声速压气机转子叶顶区域流场非定常计算和POD分析[J]. 动力工程学报,2018,38(6):458-466.
Liu Zhenxiong,Zhu Xiaocheng,Du Zhaohui. Numerical investigation and POD analysis on unsteady flow field in tip region of a transonic compressor rotor[J]. Journal of Chinese Society of Power Engineering,2018,38(6):458-466.
[14]Kim M,Lee J H,Park H. Study of bubble-induced turbulence in upward laminar bubbly pipe flows measured with a two-phase particle image velocimetry[J]. Experiments in Fluids,2016,57(4):55.
[15]Cal R B,Brzek B,Johansson T G,et al. The rough favourable pressure gradient turbulent boundary layer[J]. Journal of Fluid Mechanics,2009,641(25):129-155.
[16]Clauser F H. The turbulent boundary layer[J]. Advances in Applied Mechanics,1956,4(1):1-51.
[17]Kim J,Moin R,Moser R. Turbulence statistics in fully developed channel flow at low Reynolds number[J]. Journal of Fluid Mechanics,1987,177(1):133-166.
[18]Zhao Penglong,Chen Yaohui,Dong Gang,et al. Proper orthogonal decomposition analysis on longitudinal streaks in channel flow laden with micro-bubbles[J]. Fluid Dynamics Research,2019,51(3):035504
[19]Wu Y,Christensen K T. Spatial structure of a turbulent boundary layer with irregular surface roughness[J]. Journal of Fluid Mechanics,2010,655(25):380-418.

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备注/Memo

备注/Memo:
收稿日期:2019-07-12 修回日期:2019-09-18
基金项目:重点实验室基金(9140C300206150C30143)
作者简介:赵朋龙(1989-),男,博士,主要研究方向:实验流体力学,E-mail:njustzpl@163.com; 通讯作者:陈耀慧(1979-),男,博士,副教授,主要研究方向:实验流体力学,E-mail:cyh873@163.com。
引文格式:赵朋龙,陈耀慧,董刚,等. 基于本征正交分解的湍流边界层中条带结构实验研究[J]. 南京理工大学学报,2019,43(6):752-758.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2019-12-31