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Fast Multi-Objective Aerodynamic Optimization Using Sequential Domain Patching and Multifidelity Models
Abstrakt
Exploration of design tradeoffs for aerodynamic surfaces requires solving of multi-objective optimization (MOO) problems. The major bottleneck here is the time-consuming evaluations of the computational fluid dynamics (CFD) model used to capture the nonlinear physics involved in designing aerodynamic surfaces. This, in conjunction with a large number of simulations necessary to yield a set of designs representing the best possible tradeoffs between conflicting objectives (referred to as a Pareto front), makes CFD-driven MOO very challenging. This paper presents a computationally efficient methodology aimed at expediting the MOO process for aerodynamic design problems. The extreme points of the Pareto front are obtained quickly using single-objective optimizations. Starting from these extreme points, identification of an initial set of Pareto-optimal designs is carried out using a sequential domain patching algorithm. Refinement of the Pareto front, originally obtained at the level of the low-fidelity CFD model, is carried out using local response surface approximations and adaptive corrections. The proposed algorithm is validated using a few multi-objective analytical problems and an aerodynamic problem involving MOO of two-dimensional transonic airfoil shapes where the figures of interest are the drag and pitching moment coefficients. A multifidelity model is constructed using CFD model and control points parameterizing the shape of the airfoil. The results demonstrate that an entire or a part of the Pareto front can be obtained at a low cost when considering up to eight design variables.
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Autorzy (3)
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Anand Amrit
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Leifur Leifsson
Cytuj jako
Pełna treść
- Wersja publikacji
- Accepted albo Published Version
- Licencja
- Copyright (2020 the American Institute of Aeronautics and Astronautics, Inc)
Słowa kluczowe
Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
-
JOURNAL OF AIRCRAFT
nr 57,
strony 1 - 11,
ISSN: 0021-8669 - Język:
- angielski
- Rok wydania:
- 2020
- Opis bibliograficzny:
- Amrit A., Leifsson L., Kozieł S.: Fast Multi-Objective Aerodynamic Optimization Using Sequential Domain Patching and Multifidelity Models// JOURNAL OF AIRCRAFT -Vol. 57,iss. 3 (2020), s.1-11
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.2514/1.c035500
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 107 razy
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