渦発生ジェットを伴う後方ステップはく離せん断層の縦渦構造 : 吹出し間隔の影響(流体工学,流体機械)

概要

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The paper presents the flow mechanism of a reattachment process over a backward facing step with vortex generator jets (VGJs). The spanwise arrays of VGJs upstream of the step introduces the co-rotating longitudinal vortices in a separating shear layer. The measurement of the longitudinal vortices by the hot wire anemometer is made to clarify the spanwise structure in the separating shear layer downstream of the step. The particular emphasis is placed on understanding of the effect of the jet injection pitch on the shear layer development. The spanwise structure in the case of the injection pitch of 20 times jet diameter shows two dimensional feature at the bottom of the separating shear layer as in the distribution of forward flow fraction near the reattachment region.
社団法人日本機械学会の論文
2006-02-25