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Wake Vortex Encounter Risk Assessment for Crosswind Departures

Kauertz, Sebastian and Holzäpfel, Frank and Kladetzke, Jan (2012) Wake Vortex Encounter Risk Assessment for Crosswind Departures. Journal of Aircraft, 49, pp. 281-291.

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Official URL: http://www1.aiaa.org/content.cfm?pageid=318


In the European research project, CREDOS (Crosswind-Reduced Separations for Departure Operations), the feasibility of a concept for reduced wake turbulence separations upon departure in crosswind conditions has been investigated. The safety assessment of this concept includes risk assessment with respect to wake vortex encounters. This paper describes the methodology developed for this assessment and its application during the project. The methodology employs two simulation tools, the Wake Vortex Scenarios Simulation Package for Departure (WakeScene-D) and the Vortex Encounter Severity Assessment for Departure (VESA-D), which are extensions of existing tools related to the departure flight phase. WakeScene-D primarily determines the frequency of wake encounters, whereas VESA-D estimates the severity of these encounters. Both can be combined to quantify and compare wake encounter risk for various departure scenarios. In the risk assessment, departures with variable aircraft separations and varying crosswind conditions were investigated to determine which crosswind level is necessary to suspend wake-turbulence-related separations during departure without degrading safety. Monte Carlo simulations have been conducted comparing medium and heavy aircraft type departures with 2 min. of separation to departures with a separation of 1 min. under varying crosswind strengths. The results not only give an indication of which crosswind magnitudes could be sufficient to safely suspend wake-turbulence-related separations upon takeoff, but they also reveal significant influences, such as the departure route layout and the change of wind direction with altitude, on wake encounter risk.

Document Type:Article
Title:Wake Vortex Encounter Risk Assessment for Crosswind Departures
AuthorsInstitution or Email of Authors
Kauertz, SebastianAirbus, Toulouse, F
Holzäpfel, Frank DLR
Kladetzke, Jan DLR
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 281-291
Keywords:wake vortices, VESA, WakeScene, Monte Carlo simulation, departure, crosswind, risk assessment, encounter severity
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: Jana Freund
Deposited On:12 Mar 2012 14:12
Last Modified:13 Feb 2013 14:59

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