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How plate lines influence the hazard perception of pilots during wake encounters

Vechtel, Dennis and Stephan, Anton and Holzäpfel, Frank (2019) How plate lines influence the hazard perception of pilots during wake encounters. Journal of Aircraft, 57 (2), pp. 360-367. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.C035689 ISSN 0021-8669

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Official URL: https://arc.aiaa.org/doi/full/10.2514/1.C035689

Abstract

In free air aircraft wake vortices descend due to their mutually induced velocities. In ground proximity, however, they are hindered to descent, which increases the encounter risk significantly. Recent investigations showed that vortex decay in ground proximity can be accelerated by installing a series of plates in lines perpendicular to the flight direction in front of the runway (so-called plate lines). A previous encounter simulation study showed that the accelerated vortex decay due to the presence of a plate line leads to a reduced aircraft response during wake encounters with autopilot engaged. The present study analyses whether the plate lines also have a positive influence on the subjective hazard perception of pilots. Flow fields generated by coupled RANS-LES simulations of an A340-sized aircraft in ground effect with light crosswind with and without plate lines were implemented in a full-flight simulator of an A320-sized aircraft for different vortex ages. Simulations with pilots-in-the-loop also show a reduction of the aircraft response during manual landings as well as improved subjective pilot acceptance. Plate lines are therefore considered an effective means for either increasing flight safety with current minimum separations or maintaining the same level of safety in case of reduced minimum separations.

Item URL in elib:https://elib.dlr.de/131572/
Document Type:Article
Title:How plate lines influence the hazard perception of pilots during wake encounters
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Vechtel, DennisDLR, FTUNSPECIFIED
Stephan, AntonDLR, IPAUNSPECIFIED
Holzäpfel, FrankDLR, IPAhttps://orcid.org/0000-0003-3182-1832
Date:2019
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:57
DOI :10.2514/1.C035689
Page Range:pp. 360-367
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0021-8669
Status:Published
Keywords:plate lines, hazard perception of pilots, wake encounters
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Braunschweig , Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Institute of Flight Systems
Deposited By: Stephan, Anton
Deposited On:28 Nov 2019 16:25
Last Modified:26 May 2020 16:00

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