AM06-03-022 バイモーダル励起された二次元噴流のレイノルズ応力とエネルギー生成(乱流渦構造(5),一般講演)

概要

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The effects of vortex interaction on energy transfer mechanism were examined in a parabolic plane jet controlled by bimodal excitation and tabs. Reynolds stress and production terms in energy transport equations were calculated by making triple decomposition analysis on the result of conditional hotwire measurements. Coherent and incoherent components of the Reynolds stress had maximum values just before the vortex pairing. A pair of a stronger and a weaker vortex aligned in the streamwise direction merged in the non-liner interaction region and the symmetric vortex arrangement shifted to anti-symmetric one. Then, the coherent component of the Reynolds stress decreased rapidly and the incoherent component became to distribute more widely around the merged vortex. The coherent component of energy production by the mean flow shear was dominant in the liner interaction region, though it dispersed into the incoherent component in the downstream non-liner interaction region.
日本流体力学会の論文
2006-09-05