1450 周期的変動を付加した縦渦による壁面噴流の操縦(周期平均操作による解析)

概要

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In a stronger wall jet managed by as streamwise vortex, effect of periodic perturbation on the interaction and evolution processes has been investigated in the equations derived from phase averaging and triple decomposition. Transverse and spanwise locations of vortex center have time variations associated with variation in strength of streamwise vortex. Reynolds shear stress (V^^^∿W^^^∿)^^^- generated by periodic perturbation reduce decay rate of maximum vorticity in terms of production terms in transport equation for streamwise vorticity. Prediction of Reynolds shear stress component (V^^^∿W^^^∿)^^^- by taking account of time variation of both vortex center and strength successfully explains experimental data of conventional time average stress of (VW)^^^-.
社団法人日本機械学会の論文
2003-08-05