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Forced Response of Mistuned Bladed Discs in Gas Flow: A Comparative Study of Predictions and Full-Scale Experimental Results

Petrov, Evgeny and Di Mare, Lucca and Hennings, Holger and Elliot, Robert (2009) Forced Response of Mistuned Bladed Discs in Gas Flow: A Comparative Study of Predictions and Full-Scale Experimental Results. In: Proceedings of ASME Turbo Expo 2009 (GT2009-59632). ASME Turbo Expo 2009, 2009-06-08 - 2009-06-12, Orlando, FL (USA).

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Abstract

An integrated experimental-numerical study of forced response for a mistuned bladed disc has been performed. A full chain for the predictive forced response analysis has been developed including data exchange between the CFD code and a code for the prediction of the nonlinear forced response for a bladed disc. The experimental measurements are performed at a full-scale single stage test rig with excitation by aerodynamic forces from gas flow. Numerical modelling approaches and the test rig setup are discussed. Comparison of experimentally measured and predicted values of blade resonance frequencies and response levels for a mistuned bladed disc without dampers is performed. A good correspondence between frequencies at which individual blades have maximum response levels is achieved. The effects of structural damping and underplatform damper parameters on amplitudes and resonance frequencies of the bladed disc are explored. It is shown that the underplatform damper significantly reduces scatters in values of the individual blade frequencies and maximum forced response levels.

Item URL in elib:https://elib.dlr.de/58249/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Forced Response of Mistuned Bladed Discs in Gas Flow: A Comparative Study of Predictions and Full-Scale Experimental Results
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Petrov, EvgenyImperial College, LondonUNSPECIFIED
Di Mare, LuccaImperial College, LondonUNSPECIFIED
Hennings, HolgerInstitute of Aeroelasticity, GöttingenUNSPECIFIED
Elliot, RobertRolls-Royce plc, DerbyUNSPECIFIED
Date:2009
Journal or Publication Title:Proceedings of ASME Turbo Expo 2009
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Status:Published
Keywords:forced response, mistuning, nonlinear forced response, bladed disc, structural damping, underplatform damper
Event Title:ASME Turbo Expo 2009
Event Location:Orlando, FL (USA)
Event Type:international Conference
Event Dates:2009-06-08 - 2009-06-12
Organizer:ASME
HGF - Research field:Aeronautics, Space and Transport
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:10 Mar 2009
Last Modified:09 Feb 2017 19:18

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