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Maneuver Simulation of a Flexible Transport Aircraft with HiFi-Methods and Comparison to Experimental Data

Ritter, Markus Raimund and Reimer, Lars and Mönnich, Wulf (2018) Maneuver Simulation of a Flexible Transport Aircraft with HiFi-Methods and Comparison to Experimental Data. DLRK 2018 - Deutscher Luft- und Raumfahrtkongress, 04.-06. Sep. 2018, Friedrichshafen, Deutschland.

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A crucial issue in the development process of a modern jet transport aircraft is the comprehensive evaluation of its flight characteristics. Traditionally this requires extensive and costly flight tests including dedicated maneuvers for the development of a mathematical model via system identification. However, future aircraft designs must be characterized by increased time and cost reductions. Approaches for the replacement of flight tests therefore are of paramount importance in current research activities of aeronautical academia and industry. With the advent of sophisticated methods (CFD and CSM) for the detailed multidisciplinary simulation of complex aircraft configurations even in flight regimes characterized by compressible and viscous effects, the virtual flight test can be expected to yield results with accuracies close to the real flight test. This approach is currently followed in work package 3 of the DLR project VicToria. The goal is to establish the virtual flight test in order to significantly reduce development costs by decreasing the number of actual flight tests. Furthermore, the system identification process can already be started in the preliminary design process of the aircraft and enables its characterization at an early stage of the design. The virtual flight test proposed in this work corresponds to a multidisciplinary simulation based on high-fidelity methods for the involved disciplines. Aerodynamic forces are calculated in the time domain by CFD to account for nonlinearities; as for the flight dynamics, the governing equations of nonlinear rigid-body motions are applied. The structural flexibility of the airframe plays a decisive role for the flight dynamics, especially in maneuvers with higher loadings (e.g. 2.5 g load factor in pull-up) and is thus considered in the simulation approach. To ensure acceptable computing times, the simulations are performed massively parallel using a proper framework, where the multidisciplinary methods and processes developed in the predecessor project Digital-X are employed and extended. The test case of this work is the Airbus A320. A number of simulation models for the involved disciplines were either build from scratch (e.g. a CAD geometry representing the outer shape and the computational grid for the CFD simulations) or provided by the manufacturer (finite element model). Results of unsteady symmetric tail input maneuvers are presented for different levels of excitation. Selected results will be compared with data from flight tests.

Item URL in elib:https://elib.dlr.de/122074/
Document Type:Conference or Workshop Item (Speech)
Title:Maneuver Simulation of a Flexible Transport Aircraft with HiFi-Methods and Comparison to Experimental Data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ritter, Markus RaimundMarkus.Ritter (at) dlr.dehttps://orcid.org/0000-0003-3828-0397
Reimer, LarsLars.Reimer (at) dlr.deUNSPECIFIED
Mönnich, WulfInstitut für FlugsystemtechnikUNSPECIFIED
Date:4 September 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:CFD, numerical flight Dynamics, virtual flight test, ATRA
Event Title:DLRK 2018 - Deutscher Luft- und Raumfahrtkongress
Event Location:Friedrichshafen, Deutschland
Event Type:national Conference
Event Dates:04.-06. Sep. 2018
Organizer:Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.
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 - VicToria (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Institute for Aerodynamics and Flow Technology > CASE, BS
Institute of Flight Systems > Flight Dynamics and Simulation
Deposited By: Ritter, Markus Raimund
Deposited On:20 Nov 2018 15:30
Last Modified:20 Nov 2018 15:30

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