2000: Numerical study of wake vortex behavior in turbulent domains with ambient stratification (1013) [3 citations — 2 self]
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Abstract:
A three-dimensional large eddy simulation model is used to investigate the sensitivity of ambient stratification with turbulence on the behavior of aircraft wake vortices. Modeled ambient turbulence levels range from very weak to moderate, and stratification levels range from strongly stable to unstable. The results of profound significance from this study are: 1) very little sensitivity between vortex linking time and the level of stratification, 2) the mean vortex separation remained nearly constant regardless of stratification and turbulence (at least prior to linking), 3) the wake vortices did not rise regardless of the level of stratification, and 4) for very strong stratification, the vortex stopped descending and quickly dissipated even before vortex linking could occur. These results are supported by experimental data and are contrary to conclusions from other numerical studies that assume laminar flow and/or relatively-low Reynolds numbers.
Citations
| 19 | An Aircraft Vortex Spacing System (AVOSS) For Dynamical Wake Vortex Spacing Criteria – Hinton - 1995 |
| 14 | NASA Wake Vortex Research for Aircraft Spacing – Perry, Hinton, et al. - 1997 |
| 7 | C.: Development and Validation of a Wake Vortex Prediction Algorithm – 5Robins, Delisi, et al. |
| 5 | Wake-vortex eddy-dissipation model predictions compared with observations – Sarpkaya, Robins, et al. - 2000 |
| 4 | A New Model for Vortex Decay in the Atmosphere – Sarpkaya - 2000 |
| 2 | A New Model for Vortex Decay – Sarpkaya - 1999 |
| 1 | NASA Aircraft Vortex Spacing System Development Status – R, Grigsby - 1999 |
| 1 | Vortex Research for Aircraft Spacing,” 35th Aerospace Sciences Meeting & Exhibit – A - 1997 |
