0206 層流斑点から乱流斑点への遷移における乱れ領域の増殖(OS2-2 乱流の計測・解析・制御,オーガナイズドセッション)

概要

論文の詳細を見る
A spot, generated by an artificial disturbance introduced into a laminar boundary layer, had a highly reproducibility in its velocity perturbations during the initial stage of its downstream development. Thus, we called it a "laminar spot" and investigated its downstream development in detail. The purpose of this study was to investigate the generation of an irregularity in the velocity perturbation. The results show that the irregularity occurred locally in the low-speed region away from the wall, while it spread wide in the vicinity of the wall. The irregularity of the phase shifts was predominant in both the low- and high-speed region, and that of the amplitude arose between their regions. Then, a new 'valley' occurred in the velocity perturbation, and the turbulence grew rapidly in the tail part of the spot.
一般社団法人日本機械学会の論文
2009-11-06