CAJ | 학술논문

采用氢气泡流动显示技术，以水为工质，对较小尺度竖直矩形通道湍流边界层内的长带条拟序结构进行了可视化实验研究。研究通道边界层内长带条的统计特性，并与光滑平板边界层内长带条的现象进行了对比。从长带条形成机理方面对其间距的特点进行了解释，分析 y＋变化对通道内长带条分布的影响，并对通道内长带条的频率特性进行探讨，得到了通道内长带条频率的关系式。
채용경기포류동현시기술，이수위공질，대교소척도수직구형통도단류변계층내적장대조의서결구진행료가시화실험연구。연구통도변계층내장대조적통계특성，병여광활평판변계층내장대조적현상진행료대비。종장대조형성궤리방면대기간거적특점진행료해석，분석 y＋변화대통도내장대조분포적영향，병대통도내장대조적빈솔특성진행탐토，득도료통도내장대조빈솔적관계식。
T he long stripe coherent structure of the turbulent boundary layer in a small-scale vertical rectangular channel was observed by using hydrogen bubble flow trace visualization technique .The statistical properties of the long stripe in the experimental channel boundary layer were compared with that in the smooth flat plate boundary lay-er .The pitch characteristics were explained by the formation mechanism of the long stripe .It was analyzed that how the change of y+ affected the distribution of the long stripe .In addition ,the frequency characteristics of the long stripe were also investigated ,and the correlation of the long stripe frequency in such a flow channel was obtained .