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Thermodynamic and Rotordynamic Assessment of Conventional and Ultra-High Bypass Ratio Engines

Müller, T. S. and Giesecke, Daniel and Friedrichs, Jens and Hennings, Holger (2017) Thermodynamic and Rotordynamic Assessment of Conventional and Ultra-High Bypass Ratio Engines. In: ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery. ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, 16.-21. Dez. 2017, Maui, Hawaii, USA.

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Abstract

Due to the economical aspiration to increase the efficiency and several ecological regulations to reduce CO2 and noise emissions, aircraft and engine manufacturer have to increase the bypass ratio of gas turbines. But, the higher the bypass ratio of a gas turbine is the larger the rotating masses are. Thus, concerning the system stability due to the change of the eigenbehavior of the aircraft in its structure, the dynamic influences of gyroscopic moments as the consequence of the angular momentum of the engine are an uncertainty and need to be investigated carefully. This paper compares two gas turbines, a conventional one with a bypass ratio of 5 and one with an ultra-high bypass ratio of 17. Two different approaches are presented. On the one hand, a comparison regarding the thermodynamical cycle process, on the other hand, using a multibody formulation, a model of a Coanda wing with each of the engines mounted over the airfoil is presented. The analysis conducts the structural coupling and dynamical influences on the wing structure arising during their operation at specific design points. The comparison of the dynamic influences should show which structural effects on the wing structure come along with the trade-off due to increased thermodynamic efficiency.

Item URL in elib:https://elib.dlr.de/115291/
Document Type:Conference or Workshop Item (Speech)
Title:Thermodynamic and Rotordynamic Assessment of Conventional and Ultra-High Bypass Ratio Engines
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Müller, T. S.t-smueller (at) dlr.deUNSPECIFIED
Giesecke, Danield.giesecke (at) ifas.deUNSPECIFIED
Friedrichs, Jensj.friedrichs (at) ifas.deUNSPECIFIED
Hennings, HolgerHolger.Hennings (at) dlr.deUNSPECIFIED
Date:December 2017
Journal or Publication Title:ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:multibody Dynamics, thermodynamic Efficiency, gyroscopy, UHBR
Event Title:ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery
Event Location:Maui, Hawaii, USA
Event Type:international Conference
Event Dates:16.-21. Dez. 2017
Organizer:Arts et Metiers Paris Tech / Virginia Tech
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Müller, Thomas Stephan
Deposited On:06 Dec 2017 15:27
Last Modified:31 Jul 2019 20:12

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