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Large-Amplitude Gusts on the NASA Common Research Model

Friedewald, Diliana (2022) Large-Amplitude Gusts on the NASA Common Research Model. In: AIAA Aviation 2022 Forum. AIAA AVIATION Forum 2022, 27. Juni – 01. Juli 2022, Chicago, Illinois, USA. doi: 10.2514/6.2022-3443.

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Official URL: https://arc.aiaa.org/doi/10.2514/6.2022-3443


Up to date, there is only little knowledge on the topic of unsteady nonlinear transonic flow, which results from large-amplitude excitations. The Certification Specifications for Large Aeroplanes, however, demand loads computations for large-amplitude excitations e.g. for gust encounters of an aircraft. In this paper, numerical solutions to the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations will be used to analyze gust responses of a transport aircraft configuration for a variety of monofrequent gusts with different lengths and amplitudes. It is shown that the unsteady nonlinear responses can lead to lower maximum lift values and lower lift derivatives compared to their time-linearized reference. These nonlinear effects diminish with increasing frequency (i.e. decreasing gust length). Though the turbulence model of Spalart and Allmaras shows completely different separation patterns than the differential Reynolds-stress model used, the variation of the turbulence model does not alter the overall qualitative findings, but has an effect on the quantitative values only.

Item URL in elib:https://elib.dlr.de/187231/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Video presentation: https://doi.org/10.2514/6.2022-3443.vid
Title:Large-Amplitude Gusts on the NASA Common Research Model
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Friedewald, DilianaUNSPECIFIEDhttps://orcid.org/0000-0002-5591-2459UNSPECIFIED
Date:June 2022
Journal or Publication Title:AIAA Aviation 2022 Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:gust excitation, unsteady nonlinear aerodynamics, URANS, CFD,
Event Title:AIAA AVIATION Forum 2022
Event Location:Chicago, Illinois, USA
Event Type:international Conference
Event Dates:27. Juni – 01. Juli 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Friedewald, Diliana
Deposited On:22 Aug 2022 14:12
Last Modified:22 Aug 2022 14:12

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