円柱後流通過による平板境界層バイパス遷移に関する研究(円柱径の効果)(境界層・せん断流・遷移(1),一般講演)

概要

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This paper presents some parts of comprehensive experimental studies on wake-induced bypass transition of flat-plate boundary layer subjected to pressure gradient as well as free-stream turbulence, mainly focusing on the effects of wake properties. Therefore, four different thin wires are employed as wake-generating object to change wake turbulence intensity and wake width. Detailed measurements are carried out using 7-ch hot-wire probes for capturing wake-induced turbulent spots and their precursors, which are expected to appear due to the interaction between incoming wakes and the boundary layer. The experimental evidences reveal that there probably appear streaky flow structures inside the wake-affected boundary layer, inducing Klebanoff-mode-like profiles in the boundary layer.
日本流体力学会の論文
2007-08-06