@techreport{oai:jaxa.repo.nii.ac.jp:00043590, author = {蒔田, 秀治 and 関下, 信正 and 青山, 隆一 and 林, 豊 and Makita, H. and Sekishita, N. and Aoyama, R. and Hayashi, Y.}, month = {Jun}, note = {Interaction phenomena between adjacent horseshoe vortices were experimentally investigated in a fully developed turbulent boundary layer. A pair of horseshoe vortices was artificially induced by injecting small swirling jets. To observe vortex structure, coherent velocity and vorticity components were obtained by conditional hot-wire measurement. A stronger sweep was induced by inside legs of two horseshoe vortices than by single horseshoe vortex in the symmetrical vertical plane. When two horseshoe vortices were induced simultaneously, they merged with each other at X=700mm and each inside leg of horseshoe vortices was separated. The separated legs might change to streaks. The merged horseshoe vortices grew to a single larger horseshoe structure in the downstream region. On the other hand, two horseshoe vortices induced with time delay of 20msec didn't connected between them. Separation of their inside legs was not observed apparently. Peak values of normal vorticity of trailing horseshoe vortex was smaller than that of leading horseshoe vortex at X=700mm, Y/δ=1.0., 資料番号: NALSP0059018, レポート番号: NAL SP-59}, title = {乱流境界層中における馬蹄形渦の相互干渉(渦構造の変形とレイノルズ応力に関する考察)}, year = {2003} }