DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Including Blade Elasticity into Frequency-Domain Propeller Whirl Flutter Analysis

Koch, Christopher and Koert, Benedikt (2023) Including Blade Elasticity into Frequency-Domain Propeller Whirl Flutter Analysis. Journal of Aircraft, pp. 1-11. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.C037501. ISSN 1533-3868.

Full text not available from this repository.

Official URL: https://arc.aiaa.org/doi/10.2514/1.C037501


Whirl flutter as an aeroelastic instability can be a limiting factor in the design and certification of turboprop aircraft configurations, especially for the engine suspension. Whirl flutter prediction for these configurations is currently done in the frequency domain using rigid propeller aerodynamic derivatives. Blade flexibility is neglected in this process, although it is known to have an impact on whirl flutter predictions. This paper uses frequency-domain transfer matrices for the propeller hub loads identified from a time-domain multibody simulation model of an isolated turboprop propeller and included into a frequency-domain flutter analysis to study the impact of blade elasticity on propeller whirl flutter. Results demonstrate a significantly stabilizing effect of blade elasticity on propeller whirl flutter due to a reduction of the destabilizing pitch-yaw cross-coupling moment. The method demonstrated in this paper is applicable to arbitrary time-domain propeller models and compatible with standard frequency-domain flutter processes, allowing for increased fidelity in the flutter prediction process.

Item URL in elib:https://elib.dlr.de/198305/
Document Type:Article
Title:Including Blade Elasticity into Frequency-Domain Propeller Whirl Flutter Analysis
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Koch, ChristopherUNSPECIFIEDhttps://orcid.org/0000-0001-8014-3041UNSPECIFIED
Date:18 October 2023
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-11
EditorsEmailEditor's ORCID iDORCID Put Code
UNSPECIFIEDAmerican Institute of Aeronautics and AstronauticsUNSPECIFIEDUNSPECIFIED
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:Whirl flutter, propeller, aeroelasticity, turboprop
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 - Digital Technologies
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Koch, Christopher
Deposited On:20 Nov 2023 16:33
Last Modified:23 Jan 2024 13:13

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.