| タイトル | The instability of the thin vortex ring of constant vorticity |
| 著者（英） | Tsai, C.-Y.; Widnall, S. E. |
| 著者所属（英） | Massachusetts Inst. of Tech.|NASA Ames Research Center |
| 発行日 | 1977-10-13 |
| 言語 | eng |
| 内容記述 | A theoretical study indicating that vortex rings at moderate Reynolds numbers are unstable to azimuthal bending waves is presented. Only the case of a thin vortex ring with a core of constant vorticity in an inviscid flow is examined. The disturbance flow and the mean flow of the vortex ring are derived as asymptotic solutions near the core; the stability analysis is developed completely for a certain class of bending waves that are unstable on a line filament in the presence of strain. The vortex ring is found to be always unstable for at least two wavenumbers for which waves on a line filament of the same vorticity distribution would not rotate. Published experimental results are cited to support these conclusions. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 78A14622 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/434687 |
