FOREBODY OPTIMIZATION OF A JET TRAINER AIRCRAFT USING RESPONSE SURFACE METHODOLOGY WITH GENETIC ALGORITHM

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omerkandemir_MsC_thesis.pdf

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2021-9-1

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Kandemir , Ömer

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The aerodynamic design of an aircraft's forebody geometry has a significant impact on its performance and stability. Although most studies on aircraft performance have focused on optimizing wing-like structures, the contribution of an effective forebody design to aircraft performance could be as significant as that of wing-like structures. A well-designed forebody can reduce the wave drag and improve the directional characteristics at high angles of attack. The forebody optimization of a jet trainer aircraft in terms of supersonic cruise performance and directional stability is investigated in this thesis. While doing so, two objectives are considered: the wave drag and directional stability. The response surface methodology is used to generate the aerodynamic database, and the non-dominated sorting genetic algorithm–II is used to search for Pareto-optimal solutions. The open-software flow solver SU2 is used to obtain turbulent flow solutions. It is shown that the optimization study enhances the aircraft's performance in terms of wave drag up to 2% and directional stability up to 30%.

Subject Keywords

Aerodynamics, Optimization, Response Surface, Genetic Algorithm, Design

URI

https://hdl.handle.net/11511/92186

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ö. Kandemir, “FOREBODY OPTIMIZATION OF A JET TRAINER AIRCRAFT USING RESPONSE SURFACE METHODOLOGY WITH GENETIC ALGORITHM,” M.S. - Master of Science, Middle East Technical University, 2021.