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

Petrov, Evgeny and Hennings, Holger and Elliott, Robert and di Mare, Luca (2010) Forced Response of Mistuned Bladed Disks in Gas Flow: A Comparative Study of Predictions and Full-Scale Experimental Results. Journal of Engineering for Gas Turbines and Power. American Society of Mechanical Engineers (ASME). ISSN 0742-4795

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Abstract

An integrated experimental-numerical study of forced response for a mistuned bladed disk has been performed. A full chain for the predictive forced response analysis has been developed including data exchange between the computational fluid dynamics code and a code for the prediction of the nonlinear forced response for a bladed disk. The experimental measurements are performed at a full-scale single stage test rig with excitation by aerodynamic forces from gas flow. The numerical modeling 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 disk 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 disk 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/84444/
Document Type:Article
Title:Forced Response of Mistuned Bladed Disks in Gas Flow: A Comparative Study of Predictions and Full-Scale Experimental Results
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Petrov, EvgenyDepartment of Mechanical Engineering, Imperial College London, Exhibition Road, SW7 2AZUNSPECIFIED
Hennings, Holger holger.hennings (at) dlr.deUNSPECIFIED
Elliott, RobertRolls-Royce plc, P.O. Box 31 Derby, DE24 8BJ, UKUNSPECIFIED
di Mare, Luca Department of Mechanical Engineering, Imperial College London, Exhibition Road, SW7 2AZUNSPECIFIED
Date:2010
Journal or Publication Title:Journal of Engineering for Gas Turbines and Power
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Publisher:American Society of Mechanical Engineers (ASME)
ISSN:0742-4795
Status:Published
Keywords:Forced Response, Mistuning, Bladed Disk, Experiment, Full-scale Single Stage Test Rig
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: Hennings, Holger
Deposited On:27 Sep 2013 10:25
Last Modified:08 Mar 2018 18:42

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