| タイトル | Two Dimensional Wake Vortex Simulations in the Atmosphere: Preliminary Sensitivity Studies |
| 本文（外部サイト） | http://hdl.handle.net/2060/20040100767 |
| 著者（英） | Schowalter, D. G.; Han, J.; Hinton, D. A.; Proctor, F. H.; Lin, Y.-L. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1998-01-01 |
| 言語 | eng |
| 内容記述 | A numerical large-eddy simulation model is currently being used to quantify aircraft wake vortex behavior with meteorological observables. The model, having a meteorological framework, permits the interaction of wake vortices with environments characterized by crosswind shear, stratification, and humidity. The addition of grid-scale turbulence as an initial condition appeared to have little consequence. Results show that conventional nondimensionalizations work very well for vortex pairs embedded in stably stratified flows. However, this result is based on simple environments with constant Brunt-Vaisala frequency. Results presented here also show that crosswind profiles exert important and complex interactions on the trajectories of wake vortices. Nonlinear crosswind profiles tended to arrest the descent of wake vortex pairs. The member of the vortex pair with vorticity of same sign as the vertical change in the ambient along-track vorticity may be deflected upwards. |
| NASA分類 | Aircraft Design, Testing and Performance |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/88325 |
