@techreport{oai:jaxa.repo.nii.ac.jp:00043578,
 author = {関下, 信正 and 蒔田, 秀治 and Sekishita, N. and Makita, H.},
 month = {Jun},
 note = {Three dimensional deformation and pairing process of vortex tubes were investigated in a two-dimensional parabolic jet exhausted from a nozzle of 1Omm × 400mm. Hot-wire measurement and multi-smokewire visualization were compared. Vortex pairing occurred periodically around X/2h≒7 when the bimodal excitation conducted at us/uf=1, Φ=0 deg, where uf and us were fundamental and subharmonic components, respectively, and Φ was the phase deference between uf and us. Vortex arrangement shifted into anti-symmetric one after the pairing. At Φ=120°, the vortex pairing became to occur occasionally. When two vortices didn't paired, the symmetric arrangement was kept until far downstream. Rib structures elongated from the roll vortices were important role as the interaction between the roll vortices., 資料番号: NALSP0059006, レポート番号: NAL SP-59},
 title = {二次元噴流中に存在する渦構造の合体機構},
 year = {2003}
}