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Surrogate Based Shape Optimization of a Low Boom Axisymmetric Body

Kirz, Jochen (2018) Surrogate Based Shape Optimization of a Low Boom Axisymmetric Body. In: 36th AIAA Applied Aerodynamics Conference 2018. 2018 Applied Aerodynamics Conference (AIAA AVIATION Forum), 25.-29. Jun. 2018, Atlanta, Georgia. DOI: 10.2514/6.2018-2849 ISBN 978-162410559-3

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Official URL: https://doi.org/10.2514/6.2018-2849

Abstract

The minimization of the intensity of the sonic boom is a key enabler for a future supersonic transport aircraft with a high appeal to potential operators as well as broad acceptance by the general public. In this paper a robust surrogate based optimization method including high-fidelity near-field Euler simulations with the DLR TAU code, the TRAPS propagation algorithm and the evaluation of the level of perceived loudness is developed. By optimizing a low boom body of revolution geometry provided by the Second AIAA Sonic Boom Prediction Workshop, an approach for the parametrization of the geometry to minimize the generation of irregular geometries is presented and the required number of design variables to obtain shaped pressure signatures is described. It is shown that the setup of the surrogate model is very important for fast convergence and good optimization results. The best and fastest convergence of the optimization was achieved with a polynomial order of the trend function of the surrogate model larger than two and the Differential Evolutionary algorithm for the tuning of the hyperparameters of the surrogate model. Multi-objective low-boom, low-drag optimizations are compared with a single-objective low-boom optimization. Although both optimizations yield an improvement of the perceived loudness and the drag, the improvement in loudness is larger for the singleobjective optimization.

Item URL in elib:https://elib.dlr.de/124011/
Document Type:Conference or Workshop Item (Speech)
Title:Surrogate Based Shape Optimization of a Low Boom Axisymmetric Body
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kirz, JochenJochen.Kirz (at) dlr.deUNSPECIFIED
Date:June 2018
Journal or Publication Title:36th AIAA Applied Aerodynamics Conference 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.2514/6.2018-2849
ISBN:978-162410559-3
Status:Published
Keywords:Sonic Boom, TAU, SBO, TRAPS
Event Title:2018 Applied Aerodynamics Conference (AIAA AVIATION Forum)
Event Location:Atlanta, Georgia
Event Type:international Conference
Event Dates:25.-29. Jun. 2018
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Kirz, Jochen
Deposited On:13 Dec 2018 14:38
Last Modified:13 Dec 2018 14:38

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