空气动力学学报2013，Vol.31Issue(4)：420-424,5.
近壁湍流边界层对称与非对称相干结构的形成机制分析
Analysis on formation mechanism of symmetrical and unsymmetrical coherent structure in the near wall region of turbulent boundary layer
摘要
Abstract
An initial physical model on the symmetrical and unsymmetrical coherent structure in the nearwall region of turbulent boundary layer generated by a certain local impulse disturbance is proposed.Directnumerical simulation is used to analyze the formation mechanism and the development law of the symmetricaland unsymmetrical coherent structure in the near wall region of turbulent boundary layer,particularly theevolution characteristics of symmetrical and unsymmetrical coherent structure,so as to identify which struc-ture is more likely to be stimulated and generate,and the reason of rapid increase of excitation.The thorough research enables better understanding of the formation mechanism and evolution process of turbulence,and is also important on the aspects of energy and momentum transports of turbulance.关键词
近壁湍流/边界层/相干结构/局部脉冲Key words
near wall turbulence/ boundary layer/ coherent structure/ local impulse分类
航空航天引用本文复制引用
吴卫国,陆昌根,薛世峰..近壁湍流边界层对称与非对称相干结构的形成机制分析[J].空气动力学学报,2013,31(4):420-424,5.基金项目
国家自然科学基金资助项目(批准号:11172143) （批准号:11172143）
863计划专项资助项目(批准号:2009AA03Z107) （批准号:2009AA03Z107）
