QQ客服 官方微博 反馈留言

	槽道湍流近壁结构的DPIV观测实验
	黄湛 ; 申功炘 ; Huang Zhan ; Shen Gongxin
	2010-06-08 ; 2010-06-08
关键词	槽道湍流 近壁结构 数字式粒子图像测速 触发 下掠 channel turbulence,coherent structure,DPIV, ejection, sweep O357.5
其他题名	AN EXPERIMENTAL INVESTIGATION ON COHERENT STRUCTURES IN NEAR WALL REGION OF CHANNEL TURBULENT FLOW USING DPIV
中文摘要	采用DPIV系统(由两台CCD相机组成)对槽道湍流进行速度场时间历程的观测实验,通过对大量测量结果的综合分析,取得了槽道湍流近壁结构的空间结构及其时间演化过程特征的结果,可以揭示上扫下掠、湍流瞬时速度型等现象与大尺度涡演化的物理关系,解释若干湍流大尺度结构的特征机理,还表明DPIV系统提供了一种定量观测湍流的时空结构特征的手段．; The channel turbulence is studied experimentally by using a double frame straddling CCD camera DPIV system. Through the analysis of enormous data obtained from the experiment, the spatial structure and its evolution characteristics, together with the time history of turbulence in the near wall region, are obtained. The experimental result reveals that the phenomena such as ejection, sweep and variety of instantaneous velocity profiles of turbulence bear a direct physical relation with the evolution of the clockwise transverse vortex flowing downstream. The experimental result explains the form and the evolution of inflexion of the instantaneous velocity profile when the clockwise transverse vortex passes through it. From the experimental result, we can explain some characteristic mechanism of large scale structure. The experimental result also shows that DPIV system can provide quantitative and qualitative information concerning turbulence spatial characteristics and is suitable for experimental studies on turbulence in the near wall region.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/50975]
专题	清华大学
推荐引用方式 GB/T 7714	黄湛,申功炘,Huang Zhan,等. 槽道湍流近壁结构的DPIV观测实验[J],2010, 2010.
APA	黄湛,申功炘,Huang Zhan,&Shen Gongxin.(2010).槽道湍流近壁结构的DPIV观测实验..
MLA	黄湛,et al."槽道湍流近壁结构的DPIV观测实验".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。