Stephan, Anton and Zholtovski, Stefan and Holzäpfel, Frank (2016) The effect of gusts on aircraft wake vortices – one-way and two-way coupling of RANS and LES codes. 6th EASN International Conference, 18.-21. Oktober 2016, Porto, Portugal.
Full text not available from this repository.
Abstract
Aircraft wake vortices present a potential risk to following aircraft, particularly during final approach and landing, as wake vortices may remain in the air lane for a long time. Wind and turbulence are the key factors influencing the wake vortex evolution, but also the wake vortex generation behind the aircraft. Flying through a gust influences the wake vortex roll-up process and its evolution. Note that vertical and lateral gusts may affect counter-rotating wake vortices differently. Both vortices influence each other by inducing a downward velocity. Disturbances may therefore lead to local vortex tilting and later to complex three-dimensional deformation. This work employs two different hybrid RANS-LES approaches to investigate the effect of gusts on wake-vortex evolution. In a one-way coupling, a pre-calculated RANS velocity field of the aircraft’s near-field is being swept through an LES domain. The effect of a sine gust on the turbulent wake is modelled by manipulating the RANS-field accordingly. As a more sophisticated approach the concept of two-way coupling is being presented. Here an LES and a URANS solver are coupled bi-directionally, exchanging values at every physical time step.
Item URL in elib: | https://elib.dlr.de/107529/ | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | The effect of gusts on aircraft wake vortices – one-way and two-way coupling of RANS and LES codes | ||||||||||||
Authors: |
| ||||||||||||
Date: | 2016 | ||||||||||||
Refereed publication: | No | ||||||||||||
Open Access: | No | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | No | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Page Range: | pp. 642-657 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Wake Vortex; hybrid RANS-LES; gust encounter | ||||||||||||
Event Title: | 6th EASN International Conference | ||||||||||||
Event Location: | Porto, Portugal | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Dates: | 18.-21. Oktober 2016 | ||||||||||||
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: | Oberpfaffenhofen | ||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Transport Meteorology | ||||||||||||
Deposited By: | Ziegele, Brigitte | ||||||||||||
Deposited On: | 14 Nov 2016 11:28 | ||||||||||||
Last Modified: | 14 Nov 2016 11:28 |
Repository Staff Only: item control page