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On the Effect of Frequency Separation, Mass Ratio, Solidity, and Aerodynamic Resonances in Coupled Mode Flutter of a Linear Compressor Cascade

Schuff, Matthias und Chenaux, Virginie (2023) On the Effect of Frequency Separation, Mass Ratio, Solidity, and Aerodynamic Resonances in Coupled Mode Flutter of a Linear Compressor Cascade. Journal of Engineering for Gas Turbines and Power, 145 (1), 011018. American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4055788. ISSN 0742-4795.

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Kurzfassung

At a low mass ratio of structure to air, the work-per-cycle approach, or better known as the energy method, will lead to nonconservative results as aerodynamic coupling of modeshapes acts destabilizing. Using the p-k method to solve the aeroelastic stability equation, the effects of various structural aspects are investigated for a two-dimensional compressor cascade in subsonic and transonic flow conditions. The investigated key parameters are frequency separation, mass ratio, and solidity. Furthermore, the effect of a high frequency dependency of the aerodynamic forces is presented. Such phenomena can happen in case of aerodynamic or acoustic resonances. If the resonance peaks are close to the aeroelastic frequency, a discontinuous behavior of the frequency or damping solution can lead to a rapid destabilization of the system, once the aeroelastic frequency moves from one side to the other of the peak. In these regimes, it is crucial to have a high quality representation of the frequency-dependent generalized aerodynamic forces (GAFs) for an accurate prediction of the flutter onset.

elib-URL des Eintrags:https://elib.dlr.de/193322/
Dokumentart:Zeitschriftenbeitrag
Titel:On the Effect of Frequency Separation, Mass Ratio, Solidity, and Aerodynamic Resonances in Coupled Mode Flutter of a Linear Compressor Cascade
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schuff, MatthiasMatthias.Schuff (at) dlr.dehttps://orcid.org/0000-0003-3276-2539NICHT SPEZIFIZIERT
Chenaux, VirginieVirginie.Chenaux (at) dlr.dehttps://orcid.org/0000-0002-9096-182XNICHT SPEZIFIZIERT
Datum:Januar 2023
Erschienen in:Journal of Engineering for Gas Turbines and Power
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:145
DOI:10.1115/1.4055788
Seitenbereich:011018
Verlag:American Society of Mechanical Engineers (ASME)
ISSN:0742-4795
Status:veröffentlicht
Stichwörter:turbomachinery, compressor, flutter, coupled mode, aerodynamic coupling, mass ratio, aerodynamic resonance
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Umweltschonender Antrieb
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L CP - Umweltschonender Antrieb
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Triebwerk, L - Komponenten und Emissionen
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Aeroelastische Experimente
Hinterlegt von: Schuff, Matthias
Hinterlegt am:01 Feb 2023 21:10
Letzte Änderung:29 Mär 2023 00:03

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