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Validation of a Linearized Navier-Stokes Based Flutter Prediction Tool Part1: Numerical Methods

Kersken, Hans-Peter and Ashcroft, Graham and Frey, Christian and Pütz, Oliver and Stüer, Heinrich and Schmitt, Stefan (2012) Validation of a Linearized Navier-Stokes Based Flutter Prediction Tool Part1: Numerical Methods. ASME Turbo Expo 2012, 11.-15. Juni 2012, Kopenhagen, Dänemark.

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This is the first of two papers describing the validation o a tool chain for flutter prediction. This first paper provides an overview of the numerical methods and their verification. The second paper presents the detailed validation of the tool chain on the basis of experimental data obtained from measurements of an annular cascade sector comprising slightly twisted turbine blades. The tool chain consists of commercial programs for grid generation, structural analysis and the computation of the stead flow, and software developed at DLR for data conversion, aeroe- lastic preprocessing, and solving the time-linearized RANS equations. The time-linearized solver computes the unsteady flow in the frequency domain based on the linearization of the RANS equations about a steady solution which, in the process chain presented here, is provided by the commercial solver. We inves- tigate the issues that arise from using different spatial discretizatiom schemes and turbulence models for the computation of the steady and the time-linearized solutions. Results are presented for Standard Configurations 4, 10 and 11, and a freestanding tur- bine blade from a rear stage of a stationary gas turbine. It is shown that with an appropriate choice of the spatial discretiza- tion parameters good agreement with reference data can be ob- tained.

Item URL in elib:https://elib.dlr.de/76861/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Validation of a Linearized Navier-Stokes Based Flutter Prediction Tool Part1: Numerical Methods
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kersken, Hans-Peter hans-peter.kersken (at) dlr.de UNSPECIFIED
Ashcroft, Grahamgraham.ashcroft (at) dlr.deUNSPECIFIED
Frey, Christianchristian.frey (at) dlr.deUNSPECIFIED
Pütz, Oliverpuetz.oliver (at) siemens.com UNSPECIFIED
Stüer, Heinrichheinrich.stueer (at) siemens.com UNSPECIFIED
Schmitt, Stefanschmittstefan (at) siemens.comUNSPECIFIED
Date:June 2012
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Linearisierung, RANS, Flattern
Event Title:ASME Turbo Expo 2012
Event Location:Kopenhagen, Dänemark
Event Type:international Conference
Event Dates:11.-15. Juni 2012
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 - Virtual Engine and Validation Methods (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Institute of Propulsion Technology
Deposited By: Kersken, Dr.rer.nat. Hans-Peter
Deposited On:08 Jan 2013 09:48
Last Modified:08 Jan 2013 09:48

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