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Aeroelastic analysis of a contra-rotating fan for a high bypass ratio engine

Vasanthakumar, Parthasarathy and Belz, Joachim (2009) Aeroelastic analysis of a contra-rotating fan for a high bypass ratio engine. In: Proceedings "CEAS 2009". CEAS 2009 - European Air and Space Conference, 26-29 October 2009, Manchester, United Kingdom.

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Engine design for modern civil transport aircraft is required to achieve noise reduction coupled with high fuel efficiency. The use of contra-rotating fan in high bypass ratio turbofan engines is aimed at providing significant improvement in the reduction of carbon dioxide emissions and noise levels in addition to the increase in propulsive efficiency and wider stall-free operation. In the present work, the flutter characteristics of a contrarotating fan blisk for a high bypass ratio engine have been computationally investigated. Unsteady time domain simulations have been performed for each blisk separately for two different operating speeds to get the flutter predictions. The predicted aerodynamic damping for different interblade phase angles shows that the fan configuration is stable for the speeds investigated. The presence of shock does not have an adverse effect on the unsteady surface pressure. It is the phase rather than the amplitude of the first harmonic unsteady surface pressure that influences the damping behaviour.

Item URL in elib:https://elib.dlr.de/65738/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Aeroelastic analysis of a contra-rotating fan for a high bypass ratio engine
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Vasanthakumar, ParthasarathyUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Proceedings "CEAS 2009"
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:contra-rotating fan, flutter, interblade phase angle, aerodynamic damping
Event Title:CEAS 2009 - European Air and Space Conference
Event Location:Manchester, United Kingdom
Event Type:international Conference
Event Dates:26-29 October 2009
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:26 Oct 2010 11:26
Last Modified:26 Oct 2010 11:26

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