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Dynamic Aeroelastic Simulations of the Pazy Wing by UVLM with Nonlinear Viscous Corrections

Ritter, Markus Raimund and Hilger, Jonathan (2022) Dynamic Aeroelastic Simulations of the Pazy Wing by UVLM with Nonlinear Viscous Corrections. In: AIAA SciTech 2022 Forum. 2022 AIAA SciTech Forum, 03.-07. Jan. 2022, Online. doi: 10.2514/6.2022-0177. ISBN 978-162410631-6.

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The Pazy Wing test case is a benchmark for the investigation of aeroelastic effects at very large deflections. Tip deformations in the order of 50 % span were measured in wind tunnel tests which renders this model highly attractive for the validation of numerical aeroelastic methods and tools for geometrically nonlinear, large deflection analyses. Various wind tunnel tests close to regions of aeroelastic instability were performed recently by Technion, and limit cycle oscillations (LCOs) were observed at some of the test points. These LCOs are the result of structural and aerodynamic nonlinearities, especially flow separation. The simulation of such a complex and highly nonlinear phenomenon is the goal of our current activities within the Large Deflection Working Group of the 3rd Aeroelastic Prediction Workshop (AePW3). To restrict the modeling efforts and the computational complexity, the aerodynamic method (a potential-theory based UVLM) is extended to account for particular viscous effects, mainly flow separation. Therefore, the effective lift coefficient of each stripe of the vortex lattice grid is determined and the circulations of the panels of the stripe are modified once a maximum value is exceeded. The proposed method neglects dynamic effects but effectively limits the oscillation amplitude as is demonstrated by nonlinear time domain simulations in the unstable regime.

Item URL in elib:https://elib.dlr.de/188219/
Document Type:Conference or Workshop Item (Speech)
Title:Dynamic Aeroelastic Simulations of the Pazy Wing by UVLM with Nonlinear Viscous Corrections
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ritter, Markus RaimundMarkus.Ritter (at) dlr.dehttps://orcid.org/0000-0003-3828-0397
Hilger, JonathanJonathan.Hilger (at) dlr.dehttps://orcid.org/0000-0003-4138-0807
Date:3 January 2022
Journal or Publication Title:AIAA SciTech 2022 Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
EditorsEmailEditor's ORCID iD
Ritter, Markus RaimundMarkus.Ritter@dlr.dehttps://orcid.org/0000-0003-3828-0397
Keywords:Numerical Aeroelasticity, Large Deformations, Limit Cycle Oscillations, Vortex-Lattice Method, Pazy Wing, Aeroelastic Prediction Workshop, Large Deflection Working Group
Event Title:2022 AIAA SciTech Forum
Event Location:Online
Event Type:international Conference
Event Dates:03.-07. Jan. 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Deposited By: Ritter, Markus Raimund
Deposited On:09 Sep 2022 10:29
Last Modified:16 Sep 2022 11:51

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