二次元噴流の遷移過程におけるレイノルズ応力分布

概要

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Symmetrical and antisymmetrical vortex arrangements were acoustically excited in the transition process of a parabolic plane jet. Three components of Reynolds stress were obtained around the coherent vortices through a conditional sampling method. Phase-averaged Reynolds stress was mostly generated in the saddles of the vorticity distribution between adjacent coherent vortices. Incoherent Reynolds stress dominated throughout the transition process for the symmetrical mode. For the antisymmetrical mode, coherent Reynolds stress was induced through the roll-up process and formed four-lobed clover-leaf type distributions around coherent vortices in the upstream region. The incoherent Reynolds stress was produced mainly by the decay of the coherent vortices in the downstream region.
社団法人日本機械学会の論文
1994-09-25