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Differences in aircraft reaction between space-fixed and time-fixed simulations of wake encounters

Vechtel, Dennis (2015) Differences in aircraft reaction between space-fixed and time-fixed simulations of wake encounters. DLR-Interner Bericht. DLR-IB 111-2015/16, 69 S.

Full text not available from this repository.

Abstract

A simulation study was performed for quantification of the differences in aircraft reaction between space-fixed and time-fixed wake encounter simulations. In DLR’s terminology, “space-fixed” encounter simulation means that the aircraft encounters the wake on a free flight path, whereas for “time-fixed” encounter simulations the vortex induced forces and moments for a specific, predefined flight path through the vortex’ flow field are evaluated and recorded prior the actual encounter simulation. These pre-recorded force and moment histories are then played back during the encounter simulation time-based and independent on the actual position of the aircraft. The results show a good accordance in aircraft reaction between both encounter simulation methods in most cases. Only very long lasting encounters (e.g. due to very small encounter angles) showed considerable differences, although the maxima were of comparable magnitude. Assuming, that space-fixed encounter simulations show realistic encounter characteristics, the results show that time-fixed encounters are indeed less realistic but can be regarded as reasonable approach for encounter simulation.

Item URL in elib:https://elib.dlr.de/97909/
Document Type:Monograph (DLR-Interner Bericht)
Title:Differences in aircraft reaction between space-fixed and time-fixed simulations of wake encounters
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Vechtel, DennisFT-FDSUNSPECIFIED
Date:July 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:69
Status:Published
Keywords:Wake Encounter Simulation, Time-fixed, Space-fixed
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Flight Dynamics and Simulation
Deposited By: Vechtel, Dennis
Deposited On:22 Sep 2015 15:58
Last Modified:22 Sep 2015 15:58

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