沟槽壁湍流多尺度相干结构实验研究

常跃峰; 姜楠

沟槽壁湍流多尺度相干结构实验研究

常跃峰^1,2,
姜楠^1,3

1.
天津大学力学系, 天津 300072
2.
山东工商学院, 烟台 264005
3.
天津市现代工程力学重点实验室, 天津 300072

基金项目: 国家自然科学基金(10472081);教育部高等学校新世纪优秀人才支持计划;天津市科技发展计划(06TXTJJC13800)

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出版历程
- 收稿日期: 2007-05-10
- 修回日期: 2007-10-08
- 刊出日期: 2008-05-28

Experimental study on coherent structure passive control and drag reduction in turbulent boundary layer with grooved surface

CHANG Yue-feng^1,2,
JIANG Nan^1,3

1.
Department of Mechanics, Tianjin University, Tianjin 300072, China
2.
Shandong Institute of Business and Technology, Yantai 264005, China
3.
Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin 300072, China

摘要

摘要: 应用热线测速技术,对沟槽壁面平板湍流边界层的减阻机理进行了实验研究.测量了风洞中并排放置的沟槽壁面平板及光滑壁面平板湍流边界层在不同雷诺数下不同法向位置的瞬时流向、法向速度分量的时间序列信号.运用流向速度分量信号的多尺度子波系数辨识壁湍流多尺度相干结构,用条件采样和相位平均技术提取了壁湍流多尺度相干结构喷射和扫掠时流向速度分量、法向速度分量和雷诺应力分量的相位平均波形.分析了沟槽壁面平板及光滑壁面平板湍流边界层中多尺度相干结构的持续时间、条件相位平均波形等特征.对沟槽壁面平板及光滑壁面平板湍流边界层多尺度相干结构的多种统计平均特征进行了比较,从壁湍流多尺度相干结构控制的角度研究了沟槽壁面平板湍流边界层的减阻机理.
- 航空、航天推进系统 /
- 壁湍流 /
- 多尺度相干结构 /
- 子波变换 /
- 沟槽壁面 /
- 减阻
Abstract: The measurement technique of constant temperature anemometry was used to study experimentally the mechanism of drag reduction in turbulent boundary layer with riblet surface.Time sequence signals of longitudinal velocity component and normal velocity component across turbulent boundary layer in the wind tunnel over riblet surface and smooth surface have been finely measured by IFA300 constant temperature anemometer with resolution higher than Kolmogorov scale,together with single-hot-wire-sensor probe and double-hot-wire-sensor probe.The ejection and sweep process of coherent structure burst event were identified by wavelet coefficients of longitudinal fluctuating velocity component.Phased-average waveforms of longitudinal and normal fluctuation velocity,as well as Reynolds stress component of coherent structures burst in turbulent boundary layer were extracted by the conditional sampling technique.The statistic characteristics of coherent structure,such as burst period,phased-average waveforms over riblets surface and smooth surface turbulent boundary layer were compared to clarify the effect of drag reduction over V-grooved riblets surface.The mechanism of drag reduction in turbulent boundary layer over V-grooved riblets surface was studied from the view of multi-scale coherent structure passive control.
- aerospace propulsion system /
- wall turbulence,multi-scale coherent structure,wavelet transform,riblet surface,drag reduction /

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参考文献(16)

[1]	Walsh M J.Riblets as a viscous drag reduction technique[J].AIAA Journal,1983,21(4):485-486.
[2]	Walsh M J.Turbulent boundary layer drag reduction using riblets[R].AIAA-82-0169,1982.
[3]	Walsh M J,Lindemann A M.Optimization and application of riblets for turbulent drag reduction[R].AIAA-84-0347,1984.
[4]	Bather E V,Smith C R.A combined visualization-anemometry study of the turbulent drag reducing mechanisms of triangular micro-groove surface modifications[R].AIAA-85-0548,1985.
[5]	Gallagher J A,Thomas A S W.Turbulent boundary layer characteristics over streamwise grooves[R].AIAA-84-2185,1984.
[6]	Coustols E.Behavior of internalmanipulators:"riblet"models in subsonic and transonic flows[R].AIAA-89-0963,1989.
[7]	Park S R,Wallace J M.Flow alteration and drag reduction by riblets in a turbulent boundary layer[J].AIAA Journal,1994,32(1):31-38.
[8]	Berchert D W,Bruse M,Hage W,et al.Experiments on drag-reducing surfaces and their optimization with an adjustable geometry[J].Journal of Fluid Mechanics,1997,338:59-87.
[9]	Choi H,Moin P,Kim J.On the effect of riblets in fully developed laminar channel flows[J].Phys Fluids A,3,1991:1892-1896.
[10]	Vukoslavcevic P,Wallace J M,Baliant J L.Viscous drag reduction using streamwise aligned riblets[7].AIAA J.1992,30:1119-1122.
[11]	WANG Jinjun,LAN Shilong,MIAO Fuyou.Drag-reduction characteristics of turbulent boundary layer flow over riblets surfaces[J].Shipbuilding of China,2001,42(4):1-5.
[12]	李新华,董守平,赵志勇.平板及减阻沟槽表面雷诺切应力的实验研究[J].实验流体力学,2006.20(1);40-44.LI Xinhua,DONG Shouping,ZHAO Zhiyong,Experimental study on Reynolds shear stress in turbulent boundary layers over smooth and drag reduction grooved surface[J].J.of Exp.in Fluid Mechanics,2006,20(1):40-44.
[13]	宫武旗、李新宏、黄淑娟.沟槽壁面减阻机理实验研究[J].工程热物理学报,2002,23(5):579-582.GONG Wuqi,LI Xinhong,HUANG Shujuan.Experiment sturdy on the mechanism of riblets drag reduction[J].J.of Engineering Thermophysics,2002,23(5):579-582.
[14]	LI Yubin,QIAO Zhide,WANG Zhiqi.An experimental research of drag reduction using riblets for the Y-7 airplane[J]Aerodynamic Experiment and Measurement & Control,1995;9(3):21-26.
[15]	PAN Jiazheng.The experimental approach to drag reduction of the transverse ribbons on turbulent flow[J].Acta Aeronautica Sinica,1996,14(3):305-310.
[16]	Nitschke P.Experimental investigation of turbulent flow in smooth and longitudinal grooved tubes[R].NASA TM 1984:77480.