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Crosswind Thresholds Supporting Wake-Vortex-Free Corridors for Departing Aircraft

Dengler, K. and Holzäpfel, F. and Gerz, T. and Wiegele, A. and De Visscher, I. and Winckelmans, G. and Bricteux, L. and Fischer, H. and Konopka, J. (2012) Crosswind Thresholds Supporting Wake-Vortex-Free Corridors for Departing Aircraft. Meteorological Applications (19), pp. 289-301. DOI: 10.1002/met.261.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/met.261/abstract

Abstract

During two field measurement campaigns aircraft wake vortex trajectory and wind measurement data have been collected at Frankfurt airport. Three different approaches to analyse the data have been used in order to estimate crosswind threshold values supporting vortex-free corridors for departing aircraft. Although several competing effects as wake vortex transport in and out of ground effect, temporal and spatial wind variability, and the spreading of aircraft trajectories after take-off complicate the analyses, all three approaches lead to similar crosswind thresholds. Employing standard instrumentation at 10 m height a minimum crosswind threshold of 3.5 – 4.6 ms-1 has been identified to clear a safety corridor of 150 m width from wake vortices with a 95% probability within 60 seconds. Alternative estimations of crosswind thresholds employing different instrumentation and different height ranges are reported. Crosswind thresholds can be reduced if the wind is measured close to the air mass in which the vortices evolve. A definite crosswind threshold for operational use cannot be deduced solely from this study since critical factors like risk and safety assessment have not yet been taken into account.

Document Type:Article
Title:Crosswind Thresholds Supporting Wake-Vortex-Free Corridors for Departing Aircraft
Authors:
AuthorsInstitution or Email of Authors
Dengler, K.Klaus.Dengler@dlr.de
Holzäpfel, F.UNSPECIFIED
Gerz, T.UNSPECIFIED
Wiegele, A.UNSPECIFIED
De Visscher, I.UNSPECIFIED
Winckelmans, G.UNSPECIFIED
Bricteux, L.UNSPECIFIED
Fischer, H.UNSPECIFIED
Konopka, J.UNSPECIFIED
Date:September 2012
Journal or Publication Title:Meteorological Applications
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1002/met.261
Page Range:pp. 289-301
Status:Published
Keywords:Crosswind threshold; wake-vortex drift; aircraft separation; departure corridor; CREDOS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Klaus Dengler
Deposited On:26 May 2011 13:48
Last Modified:12 Dec 2013 21:17

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