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CFD-based Gust Load Analysis for a Free-flying Flexible Passenger Aircraft in Comparison to a DLM-based Approach

Reimer, Lars and Ritter, Markus and Heinrich, Ralf and Krüger, Wolf (2015) CFD-based Gust Load Analysis for a Free-flying Flexible Passenger Aircraft in Comparison to a DLM-based Approach. AIAA AVIATION 2015, 22.-26. Juni 2015, Dallas, TX, USA. DOI: 10.2514/6.2015-2455

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Abstract

Gust load analysis is a relevant part of the certification process of aircraft. In need of low computing times, industrial analysis procedures often rely mainly on low-fidelty numerical aerodynamics methods, such as the Doublet Lattice method (DLM). However, their accuracy with respect to loads has not been assessed sufficiently in comparison to high-fidelity methods in the past. In this paper, simulation results of a classical DLM-based gust load analysis process are compared to the results of an alternative process in which the DLM solver is replaced by the CFD solver TAU. The investigation is performed with a realistic modern passenger aircraft. It is studied how the consideration of different levels of multidisciplinarity in the simulations affects the overall loads. The simulation methodologies exploited in the CFD-based analysis process are outlined. It is shown that the gust load factors predicted with CFD are significantly lower than those of the classical DLM-based process, not only in the transonic flow regime, where benefits from the CFD-based analysis are expected, but also in the subsonic flow regime.

Item URL in elib:https://elib.dlr.de/100537/
Document Type:Conference or Workshop Item (Speech)
Title:CFD-based Gust Load Analysis for a Free-flying Flexible Passenger Aircraft in Comparison to a DLM-based Approach
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Reimer, Larslars.reimer (at) dlr.deUNSPECIFIED
Ritter, Markusmarkus.ritter (at) dlr.deUNSPECIFIED
Heinrich, Ralfralf.heinrich (at) dlr.deUNSPECIFIED
Krüger, Wolfwolf.krueger (at) dlr.deUNSPECIFIED
Date:June 2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2015-2455
Status:Published
Keywords:Gust load analysis, fluid-structure flight mechanics coupling
Event Title:AIAA AVIATION 2015
Event Location:Dallas, TX, USA
Event Type:international Conference
Event Dates:22.-26. Juni 2015
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 - Flexible Aircraft (old)
Location: Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Deposited By: Reimer, Lars
Deposited On:09 Dec 2015 13:42
Last Modified:09 Dec 2015 13:42

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