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On Improving Efficiency and Accuracy of Variable-Fidelity Surrogate Modeling in Aero-data for Loads Context

Han, Zhong-Hua and Görtz, Stefan and Zimmermann, Ralf (2009) On Improving Efficiency and Accuracy of Variable-Fidelity Surrogate Modeling in Aero-data for Loads Context. CEAS 2009 European Air and Space conference, 26-29 Oct. 2009, Manchester, UK.

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Abstract

Variable-fidelity surrogate modeling offers an efficient way to generate aerodynamic data for aero-loads prediction based on a set of CFD methods with varying degree of fidelity and computational expense. In this paper, new algorithms, such as a Gradient-Enhanced Kriging method (direct GEK) and a generalized hybrid bridge function, have been developed to improve the efficiency and accuracy of the existing Variable-Fidelity Modeling (VFM) approach. These new algorithms and features are demonstrated and evaluated for analytical functions and used to construct a global surrogate model for the aerodynamic coefficients and drag polar of an RAE 2822 airfoil. It is preliminarily shown in this paper that they are very promising and can be used to significantly improve the efficiency and accuracy of VFM in the context of aero-loads prediction.

Document Type:Conference or Workshop Item (Lecture, Paper)
Title:On Improving Efficiency and Accuracy of Variable-Fidelity Surrogate Modeling in Aero-data for Loads Context
Authors:
AuthorsInstitution or Email of Authors
Han, Zhong-HuaZhong-Hua.Han@dlr.de
Görtz, StefanStefan.Goertz@dlr.de
Zimmermann, RalfRalf.Zimmermann@dlr.de
Date:October 2009
Refereed publication:No
In ISI Web of Science:No
Status:Published
Keywords:Variable-fidelity modeling,kriging, gradient-enhanced kriging hybrid bridge function
Event Title:CEAS 2009 European Air and Space conference
Event Location:Manchester, UK
Event Type:international Conference
Event Dates:26-29 Oct. 2009
Organizer:The Royal Aeronautical Society of UK
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Dr. Zhong-hua Han
Deposited On:26 Nov 2009 11:04
Last Modified:12 Dec 2013 20:45

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