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Computation of Aerodynamic Damping for Flutter Analysis of a Transonic Fan

Vasanthakumar , Parthasarathy (2011) Computation of Aerodynamic Damping for Flutter Analysis of a Transonic Fan. In: Proceedings of ASME Turbo Expo 2011 (GT2011-46597). ASME Turbo Expo 2011, 06 - 10 June 2011, Vancouver, Canada.

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Kurzfassung

This paper describes the computational analysis of aerodynamic damping for prediction of flutter characteristics of a transonic fan stage that consists of a highly loaded rotor along with a tandem stator. Three dimensional, linearized Navier-Stokes flow solver TRACE is used to numerically analyse the flutter stability of the fan. The linear flow solver enables the modeling of a single blade passage to simulate the desired inter-blade phase angle. The unsteady aerodynamic load on a vibrating blade is obtained by solving the unsteady Navier-Stokes equations on a dynamically deforming grid and the energy exchange method is used to calculate the aerodynamic damping. The calculation of aerodynamic damping for the prediction of flutter characteristics of the fan rotor is carried out with and without considering the influence of the disk. The blade mode shapes from finite element modal analysis are obtained accordingly and the flutter calculations are carried out for three blade vibration modes at the design speed and at part speeds for all possible inter-blade phase angles. Two operating points, one on the working line and the other near stall are investigated at every rotational speed. Different aspects that affect the aerodynamic damping behaviour like part speed operation, variation in unsteady blade surface pressure fluctuation between operating points on the working line and at near stall and the corresponding variation in aerodynamic work, inter-blade phase angle etc., are described. This analysis primarily focuses on the variations in aerodynamic damping of the fan with and without the influence of the disk. In addition, influence and effect of shock wave on the aerodynamic damping is also discussed.

elib-URL des Eintrags:https://elib.dlr.de/70210/
Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Computation of Aerodynamic Damping for Flutter Analysis of a Transonic Fan
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Vasanthakumar , ParthasarathyNICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2011
Erschienen in:Proceedings of ASME Turbo Expo 2011
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:computational analysis, unsteady aerodynamics
Veranstaltungstitel:ASME Turbo Expo 2011
Veranstaltungsort:Vancouver, Canada
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:06 - 10 June 2011
Veranstalter :American Society of Mechanical Engineers
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:keine Zuordnung
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):L - keine Zuordnung (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik
Hinterlegt von: Erdmann, Daniela
Hinterlegt am:10 Nov 2011 09:06
Letzte Änderung:31 Jul 2019 19:32

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