低雷诺数沟槽表面湍流/非湍流界面特性的实验研究

李思成; 吴迪; 崔光耀; 王晋军

doi:10.6052/0459-1879-20-211

低雷诺数沟槽表面湍流/非湍流界面特性的实验研究

doi: 10.6052/0459-1879-20-211

北京航空航天大学流体力学教育部重点实验室, 北京 100191

基金项目: 1) 国家自然科学基金资助项目(91852206);国家自然科学基金资助项目(11721202)

详细信息

作者简介:
2) 王晋军, 教授, 主要研究方向: 湍流拟序结构、流动控制、飞行器空气动力学等. E-mail: jjwang@buaa.edu.cn

通讯作者:
王晋军

中图分类号: O357.5
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出版历程
- 收稿日期: 2020-06-18
- 刊出日期: 2020-12-10

EXPERIMENTAL STUDY ON PROPERTIES OF TURBULENT/NON-TURBULENT INTERFACE OVER RIBLETS SURFACES AT LOW REYNOLDS NUMBERS

Fluid Mechanics Key Laboratory of Education Ministry, Beihang University, Beijing 100191, China

摘要

摘要: 湍流/非湍流界面是流动中湍流和无旋流的边界,其相关研究在加深对湍流与无旋流之间的物质、动量和能量交换的理解有重要意义.本文采用时间解析的二维粒子图像测速技术,分别对零压梯度光滑、顺流向锯齿形沟槽表面平板在不同雷诺数下对湍流/非湍流界面的几何特征及动力学特性进行了实验研究.实验雷诺数为$Re_{\tau } =400\sim1000$.本文采用了湍动能准则对湍流/非湍流界面进行了识别,并分析界面高度分布、分形特征及界面附近的条件平均速度和涡量.结果表明在不同雷诺数下, 无论是光滑壁面还是沟槽壁面,界面平均高度在0.8 $\sim$ 0.9$\delta_{99} $附近. 对于沟槽壁面而言,减阻时对应的界面高度的概率密度分布与光滑壁面基本一致, 均遵循正态分布,而当阻力增大时, 界面高度分布偏离正态分布出现正的偏度. 在本实验情况下,界面分形维度、跨界面速度跳变均会随着雷诺数增大而增大. 此外,不同壁面情况下无量纲条件平均涡量在界面附近的分布相近,而界面附近无量纲速度梯度最大值近似为常数.
- 湍流边界层 /
- 沟槽壁面 /
- 湍流/非湍流界面
Abstract: The turbulent/non-turbulent(T/NT) interface usually refers to the thin layer that separates turbulent flow from irrotational flow. The research of T/NT interface is of great importance to deepen the understanding of matter, momentum and energy transfer between the turbulent and irrotational flow. The geometrical and dynamical properties of the T/NT interface at different Reynolds numbers over smooth and riblets surfaces with zero-pressure-gradient at different Reynolds numbers are experimentally investigated using two-dimensional time-resolved particle image velocimetry (2D-TRPIV). The Reynolds number range is about $Re_{\tau } \approx $ 400 $\sim$ 1000 in the present experiment. The T/NT interface is detected with the turbulent kinetic energy criterion. The probability density function of the interface position, fractal characteristics and the conditional averaged velocity and vorticity near the interface are analyzed. It is shown that the mean heights of the interfaces are around 0.8 $\sim$ 0.9$\delta_{99} $ under different Reynolds numbers for both smooth and riblets surfaces. The probability density function of the interface position over drag reduction riblets surface is kept the same with the smooth surface, whose distribution agrees well with normal distribution. While for the drag increment riblets surface, the distribution of interface position deviates from the normal distribution and presents positive skewness. The fractal dimension of the interface and the velocity jump across the interface will gradually increase with the Reynolds number under the present experiment condition. Moreover, the dimensionless conditional averaged vorticities have similar distributions in the vicinity of the interface over both smooth and riblets surfaces when $Re_{\tau } $ is less than 1000, correspondingly, the maximum gradient of dimensionless conditional average streamwise velocity is approximately constant.
- turbulent boundary layer /
- riblets surface /
- turbulent/non-turbulent interface

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参考文献(1)

[1]	De Silva CM, Philip J, Chauhan K, et al. Multiscale geometry and scaling of the turbulent-nonturbulent interface in high Reynolds number boundary layers. Phys Rev Lett, 2013,111:044501
[2]	Chauhan K, Philip J, de Silva CM, et al. The turbulent/non-turbulent interface and entrainment in a boundary layer. Journal of Fluid Mechanics, 2014,742:1-33
[3]	Borrell G, Jiménez J. Properties of the turbulent/non-turbulent interface in boundary layers. Journal of Fluid Mechanics, 2016,801:554-596
[4]	Wu D, Wang JJ, Cui GY, et al. Effects of surface shapes on properties of turbulent/non-turbulent interface in turbulent boundary layers. Sci China Tech Sci, 2020,63:214-222
[5]	Bisset DK, Hunt JCR, Rogers MM. The turbulent/non-turbulent interface bounding a far wake. Journal of Fluid Mechanics, 2002,451:383-410
[6]	Westerweel J, Fukushima C, Pedersen JM, et al. Mechanics of the turbulent-nonturbulent interface of a jet. Phys Rev Lett, 2005,95:174501
[7]	Chauhan K, Philip J, Marusic I. Scaling of the turbulent/non-turbulent interface in boundary layers. Journal of Fluid Mechanics, 2014,751:298-328
[8]	Corrsin S, Kistler AL. Free-stream boundaries of turbulent flows. Technical Report. Archive & Image Library, 1954
[9]	张爽, 时钟. 稳定分层流密度界面处湍流混合与分形结构. 力学学报, 2015,47(4):547-556
[9]	( Zhang Shuang, John Z. Shi. Turbulent mixing and fractal structure at a density interface in a stably stratified fluid. Chinese Journal of Theoretical and Applied Mechanics, 2015,47(4):547-556 (in Chinese))
[10]	Walsh MJ. Riblets as a viscous drag reduction technique. AIAA Journal, 1983,21(4):485-486
[11]	Bacher E, Smith C. A combined visualization-anemometry study of the turbulent drag reducing mechanisms of triangular micro-groove surface modifications. AIAA Paper 85-0546, 1985
[12]	王晋军. 沟槽面湍流减阻研究综述. 北京航空航天大学学报, 1998(1):31-34
[12]	( Wang Jinjun. Review and prospects in turbulent drag reduction over riblets surface. Journal of Beijing University of Aeronautics and Astronautics, 1998(1):31-34 (in Chinese))
[13]	王晋军, 兰世隆, 苗福友. 沟槽面湍流边界层减阻特性研究. 中国造船, 2001,42(4):1-5
[13]	( Wang Jinjun, Lan Shilong, Miao Fuyou. Drag-reduction characteristics of turbulent boundary layer flow over riblets surfaces. Shipbuilding of China, 2001,42(4):1-5 (in Chinese))
[14]	王鑫, 李山, 唐湛棋等. 沟槽对湍流边界层中展向涡影响的实验研究. 实验流体力学, 2018,32(1):55-63
[14]	( Wan Xin, Li Shan, Tang Zhanqi, et al. An experimental study on riblet-induced spanwise vortices in turbulent boundary layers. Journal of Experiments in Fluid Mechanics, 2018,32(1):55-63(in Chinese))
[15]	王松岭, 刘顺超, 戎瑞等. 沟槽张角对流体减阻机理的数值模拟研究. 水动力学研究与进展(A辑), 2018,33(3):391-397
[15]	( Wang Songling, Liu Shunchao, Rong Rui, et al. Numerical simulation research of groove angle on the mechanism of flow drag reduction. Chinese Journal of Hydrodynamics (A), 2018,33(3):391-397 (in Chinese))
[16]	Li WP, Liu H. Two-point statistics of coherent structures in turbulent flow over riblet-mounted surfaces. Acta Mechanica Sinica, 2019,35(3):457-471
[17]	冯家兴, 胡海豹, 卢丙举等. 超疏水沟槽表面通气减阻实验研究. 力学学报, 2020,52(1):24-30
[17]	( Feng Jiaxing, Hu Haibao, Lu Bingju, et al. Experimental study on drag reduction characteristics of superhydrophobic groove surfaces with ventilation. Chinese Journal of Theoretical and Applied Mechanics, 2020,52(1):24-30 (in Chinese))
[18]	Bechert DW, Bruse M, Hage W. Experiments on drag-reducing surfaces and their optimization with an adjustable geometry. Journal of Fluid Mechanics, 1997,338:59-87
[19]	杨绍琼, 崔宏昭, 姜楠. 纵向沟槽壁面湍流边界层内类开尔文-亥姆霍兹涡结构的流动显示. 力学学报, 2015,47(3):529-533
[19]	( Yang Shaoqiong, Choi Kwing-So, Jiang Nan. Flow visualizations on kelvin-helmholtz-like roller structures in turbulent boundary layer over riblets. Chinese Journal of Theoretical and Applied Mechanics, 2015,47(3):529-533 (in Chinese))
[20]	袁一平, 杨华, 石亚丽等. 风力机专用翼型表面微沟槽减阻特性研究. 工程热物理学报, 2018,39(6):1258-1266
[20]	( Yuan Yiping, Yang Hua, Shi Yali, et al. Study on drag reduction characteristics of airfoil for wing turbine with microgrooves on surface. Journal of Engineering Thermophysics, 2018,39(6):1258-1266 (in Chinese))
[21]	Koeltzsch K, Dinkelacker A, Grundmann R. Flow over convergent and divergent wall riblets. Experiments in Fluids, 2002,33(2):346-350
[22]	崔光耀, 潘翀, 高琪等. 沟槽方向对湍流边界层流动结构影响的实验研究. 力学学报, 2017,49(6):1201-1212
[22]	( Cui Guangyao, Pan Chong, Gao Qi, et al. Flow structure in the turbulent boundary layer over directional riblets surfaces. Chinese Journal of Theoretical and Applied Mechanics, 2017,49(6):1201-1212 (in Chinese))
[23]	Kevin K, Monty J, Bai H, et al. Cross-stream stereoscopic particle image velocimetry of a modified turbulent boundary layer over directional surface pattern. Journal of Fluid Mechanics, 2017,813:412-435
[24]	Champagnat F, Plyer A, Le Besnerais G, et al. Fast and accurate PIV computation using highly parallel iterative correlation maximization. Exp Fluids, 2011,50:1169-1182
[25]	Pan C, Xue D, Xu Y, et al. Evaluating the accuracy performance of lucas-kanade algorithm in the circumstance of piv application. Sci China-Phys Mech Astron, 2015,58:104704
[26]	Clauser FH. Turbulent boundary layers in adverse pressure gradients. Journal of Aeronautic Science, 1954,21:91-108
[27]	Choi KS. Near wall structure of turbulent boundary layer with riblets. Journal of Fluid Mechanics, 1989,208:417-458
[28]	Eisma J, Westerweel J, Ooms G, et al. Interfaces and internal layers in a turbulent boundary layer. Phys Fluids, 2015,27:055103
[29]	Mandelbrot BB. On the geometry of homogeneous turbulence, with stress on the fractal dimension of the iso-surfaces of scalars. Journal of Fluid Mechanics, 1975,72:401-416
[30]	Sreenivasan KR, Ramshankar R, Meneveau C. Mixing, entrainment and fractal dimensions of surfaces in turbulent flows. Proc R Soc A-Math Phys Eng Sci, 1989,421:79-108
[31]	Prasad RR, Sreenivasan KR. Scalar interfaces in digital images of turbulent flows. Exp Fluids, 1989,7:259-264
[32]	Mandelbrot BB, Wheeler JA. The Fractal Geometry of Nature. New York: Springer, 1983
[33]	Mistry D, Dawson JR, Kerstein AR. The multi-scale geometry of the near field in an axisymmetric jet. Journal of Fluid Mechanics, 2018,838:501-515
[34]	Breda M, Buxton ORH. Behaviour of small-scale turbulence in the turbulent/non-turbulent interface region of developing turbulent jets. Journal of Fluid Mechanics, 2019,879:187-216