elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Gradient Enhanced Surrogate Models Based on Adjoint CFD Methods for the Design of a Counter Rotating Turbofan

Backhaus, Jan and Aulich, Marcel and Frey, Christian and Lengyel, Timea and Voß, Christian (2012) Gradient Enhanced Surrogate Models Based on Adjoint CFD Methods for the Design of a Counter Rotating Turbofan. ASME Turbo Expo 2012 , 11.-15. June 2012, Copenhagen, Denmark.

Full text not available from this repository.

Abstract

This paper studies the use of adjoint CFD solvers in combination with surrogate modelling in order to reduce the computational cost of the optimization of complex 3D turbomachinery components. The method is applied to a previously optimized counter rotating turbofan, with a shape parameterized by 104 CAD parameters. Through random changes on the reference design, a small number of design variations are created to serve as training samples for the surrogate models. A steady RANS solver and its discrete adjoint are then used to calculate objective function values and their corresponding sensitivities. Kriging and neural networks are used to build surrogate models from the training data. To study the impact of the additional information provided by the adjoint solver, each model is trained with and without the sensitivity information. The accuracy of the different surrogate model predictions is assessed by comparison against CFD calculations. The results show a considerable improvement of the fitness function approximation when the sensitivity information is taken into account. Through a gradient based optimization on one of the surrogate models, a design with higher isentropic efficiency at the aerodynamic design point is created. This application demonstrates that the improved surrogate models can be used for design and optimization.

Document Type:Conference or Workshop Item (Paper)
Title:Gradient Enhanced Surrogate Models Based on Adjoint CFD Methods for the Design of a Counter Rotating Turbofan
Authors:
AuthorsInstitution or Email of Authors
Backhaus, JanUNSPECIFIED
Aulich, MarcelUNSPECIFIED
Frey, ChristianUNSPECIFIED
Lengyel, TimeaUNSPECIFIED
Voß, ChristianUNSPECIFIED
Date:June 2012
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:Adjoint CFD, Counter Rotating Fan Design Optimization, Surrogate Modeling
Event Title:ASME Turbo Expo 2012
Event Location:Copenhagen, Denmark
Event Type:international Conference
Event Dates:11.-15. June 2012
HGF - Research field:Energy, Aeronautics, Space and Transport
HGF - Program:other, other
HGF - Program Themes:E - no assignement, other
DLR - Research area:Energy, Aeronautics
DLR - Program:E - no assignement, L - no assignement
DLR - Research theme (Project):E -- no assignement, L -- no assignement
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Institute of Propulsion Technology > Fan and Compressor
Deposited By: Jan Backhaus
Deposited On:09 Jul 2012 09:37
Last Modified:24 Jun 2013 16:43

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.