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Sensitivity Analysis for Forced Response in Turbomachinery using an adjoint Harmonic Balance Method

Engels-Putzka, Anna and Frey, Christian (2016) Sensitivity Analysis for Forced Response in Turbomachinery using an adjoint Harmonic Balance Method. In: Proceedings of the 7th European Congress on Computational Methods in Applied Sciences and Engineering. VII European Congress on Computational Methods in Applied Sciences and Engineering, 5-10 June 2016, Crete Island, Greece.

Full text not available from this repository.

Official URL: https://www.eccomas2016.org/proceedings/pdf/8006.pdf

Abstract

The analysis of aeroelastic properties is an important aspect in the design of turbomachinery components. In this study we focus on vibrations caused by the interaction of adjacent blade rows (forced response). This is an inherently unsteady phenomenon. But due to its periodic nature it can be efficiently treated by numerical methods formulated in the frequency domain, e.g. the harmonic balance method. When going from the analysis of individual designs using CFD to CFD-based optimisation it is desirable to compute also sensitivities of objective functions (targets and restrictions for the optimisation) with respect to design parameters. Since in typical applications the number of design parameters is much larger than the number of objective functions, it is advantageous to use the adjoint method for the computation of these sensitivities. An adjoint solver based on the harmonic balance method has been implemented in the framework of the flow solver TRACE. This is now extended and used to compute the sensitivities of aeroelastic objective functions to the amplitudes of a harmonic perturbation at the entry or exit of the respective blade row. These sensitivities can be validated by comparing to finite differences obtained from harmonic balance computations with different perturbations. We apply the method to model problems which are representative for turbomachinery configurations.

Item URL in elib:https://elib.dlr.de/105970/
Document Type:Conference or Workshop Item (Other)
Title:Sensitivity Analysis for Forced Response in Turbomachinery using an adjoint Harmonic Balance Method
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Engels-Putzka, AnnaAnna.Engels-Putzka (at) dlr.deUNSPECIFIED
Frey, ChristianChristian.Frey (at) dlr.deUNSPECIFIED
Date:June 2016
Journal or Publication Title:Proceedings of the 7th European Congress on Computational Methods in Applied Sciences and Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Papadrakakis, M.UNSPECIFIED
Papadopoulos, V.UNSPECIFIED
Stefanou, G.UNSPECIFIED
Plevris, V.UNSPECIFIED
Status:Published
Keywords:Aeroelasticity, Forced Response, Adjoint Methods, Harmonic Balance
Event Title:VII European Congress on Computational Methods in Applied Sciences and Engineering
Event Location:Crete Island, Greece
Event Type:international Conference
Event Dates:5-10 June 2016
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: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Engels-Putzka, Anna
Deposited On:12 Sep 2016 14:34
Last Modified:12 Sep 2016 14:34

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