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| Titel |
Dimension of aircraft exhaust plumes at cruise conditions: effect of wake vortices |
| VerfasserIn |
S. Unterstrasser, R. Paoli, I. Sölch, C. Kühnlein, T. Gerz |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 5 ; Nr. 14, no. 5 (2014-03-14), S.2713-2733 |
| Datensatznummer |
250118487
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| Publikation (Nr.) |
 copernicus.org/acp-14-2713-2014.pdf |
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| Zusammenfassung |
| The dispersion of aircraft emissions during the vortex phase is studied using
a 3-D LES model with Lagrangian particle tracking. The simulations start with
a fully rolled-up vortex pair of a type B747/A340 airplane and the tracer
centred around the vortex cores. The tracer dilution and plume extent is
studied for a variety of ambient and aircraft parameters until
aircraft-induced effects have ceased. For typical upper tropospheric
conditions, the impact of stratification is more dominant compared to
turbulence intensity or vertical wind shear. Moreover, the sensitivity to the
initial tracer distribution was found to be weak. Along the transverse
direction, the tracer concentrations can be well approximated by a Gaussian
distribution, along the vertical a superposition of three Gaussian
distributions is adequate. For the studied parameter range, the vertical
plume expansion ranges from 400 m to 550 m and cross-sectional area
from 4.0 × 104 m2 to 6 × 104 m2 after six
minutes. For validation, selected simulations were compared to an alternative
LES model and to in-situ NO-measurements. |
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