减阻沟槽表面近壁湍流相干运动的实验研究

减阻沟槽表面近壁湍流相干运动的实验研究

李新华¹，董守平¹，赵志勇²，陈俊峰¹，

1.中国石油大学（北京）机电工程学院，北京102249；2.中国石化集团安全工程研究院，山东青岛266071

收稿日期:2005-11-22 修回日期:2005-12-30 出版日期:2006-10-24 发布日期:2006-10-24
通讯作者: 李新华

Experiment on coherent motions in the turbulent nearwall region over a dragreducing grooved surface

LI Xin-hua¹，DONG Shou-ping¹，ZHAO Zhi-yong² and CHEN Jun-feng¹，

1.Electromechanical project institute, China University of Petroleum,2.Institute of Safety Engineering, SINOPEC, Qingdao 266071, Shandong, China

Received:2005-11-22 Revised:2005-12-30 Online:2006-10-24 Published:2006-10-24
Contact: LI Xin-hua

摘要/Abstract

摘要： 以光滑平板及间隔V型减阻沟槽面为研究对象，利用二维激光多普勒测速系统(laser doppler velocimetry, LDV)，获得零压力梯度时光滑平板及沟槽板上部区域湍流边界层流场的流向和壁法向的湍流脉动分量.考察了沟槽对速度脉动的二阶及三阶相关统计参数的影响，并将这些相关量的变化情况与边界层中的相干运动相结合，由此来探讨沟槽面与湍流边界层之间的相互作用规律.

关键词: 减阻沟槽面, 湍流边界层, 相干运动 , 雷诺切应力

Abstract: Measurements of flow field by means of a twocomponent LDV system have been carried out in turbulent boundary layers over a smooth surface and a drag reducing grooved surface with a zero pressure gradient. Variations of the second and thirdorder moments of velocity fluctuations are investigated to give thorough information on coherent motions in the turbulent nearwall region over both surfaces.

Key words: coherent motion , Reynolds shear stress, turbulent boundary layer, drag reducing grooved surface

中图分类号:

O357.5

李新华,董守平,赵志勇,陈俊峰, . 减阻沟槽表面近壁湍流相干运动的实验研究[J]. J4, 2006, 41(2): 106-110 .

LI Xin-hua,DONG Shou-ping,ZHAO Zhi-yong and CHEN Jun-feng, . Experiment on coherent motions in the turbulent nearwall region over a dragreducing grooved surface[J]. J4, 2006, 41(2): 106-110 .

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