AM06-03-006 乱流くさびにおける乱流層流界面の低速ストリーク構造について(乱流渦構造(2),一般講演)

概要

論文の詳細を見る
Lateral growth of turbulent wedge is examined experimentally in a flat-plate boundary layer at low Reynolds numbers. Turbulent wedge is generated by exciting hairpin eddies through a small hole at a location where the Reynolds number is subcritical. We focus on successive generation of low-speed streaks in ambient laminar Blasius flow, which is responsible for the lateral turbulent contamination. Lateral spacing of the low-speed streaks at both sides of turbulent wedge is found to increase in proportion to about 6.5 times the momentum thickness θ of the Blasius flow at least for low Reynolds numbers examined. Around the critical Reynolds number 150 (based on θ) for the occurrence of the lateral growth, the streak spacing is about 50 in wall units.
日本流体力学会の論文
2006-09-05