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Application of Kriging Metamodels to the Automated Start Value Generation for Gas Turbine Perfromance Simulations

Schmeink, Jens and Becker, Richard-Gregor (2018) Application of Kriging Metamodels to the Automated Start Value Generation for Gas Turbine Perfromance Simulations. In: Proceedings of the ASME Turbo Expo. ASME Turbo Expo 2018, 11.-15. Juni 2018, Olso, Norwegen.

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Abstract

This paper presents a process for automated start value generation for gas turbine performance simulations using Kriging metamodels. The metamodels are trained on a small number of pre-selected operating points in the flight envelope. Predictions of the trained metamodels are used as initialization parameters for subsequent performance simulations of arbitrary operating points in order to increase robustness and computational speed of the numerical process. Different approaches for the selection of the training points are evaluated. A comparison to the classical approach of tablebased initialization is carried out to highlight the advantages and disadvantages of the new methodology. Furthermore, the inclusion of supplementary operating points into the training sample of the metamodels is analyzed. Depending on certain criteria, such as the difference of prediction and simulation result, operating points are included into the sample and a retraining of the metamodels is performed. Simulations using the retrained models as guess value generators are compared to the previous Kriging approach. The advantages and disadvantages of the retraining approach are discussed.

Item URL in elib:https://elib.dlr.de/120474/
Document Type:Conference or Workshop Item (Speech)
Title:Application of Kriging Metamodels to the Automated Start Value Generation for Gas Turbine Perfromance Simulations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmeink, JensJens.Schmeink (at) dlr.deUNSPECIFIED
Becker, Richard-GregorRichard.Becker (at) dlr.deUNSPECIFIED
Date:June 2018
Journal or Publication Title:Proceedings of the ASME Turbo Expo
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:Performance Simulation, Triebwerk, Engine, Kriging, Initialisierung
Event Title:ASME Turbo Expo 2018
Event Location:Olso, Norwegen
Event Type:international Conference
Event Dates:11.-15. Juni 2018
Organizer:ASME IGTI
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 > Engine
Deposited By: Schmeink, Jens
Deposited On:09 Jul 2018 10:30
Last Modified:09 Jul 2018 10:30

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