Optimization of Bump Fairing in DLR-F6 Aircraft Related to Coefficient of Drag Using Simulation and Design of Experiment Method

Gabriel Jeremy Gotama(1*), Fandi Dwiputra Suprianto(2), Teng Sutrisno(3),


(1) 
(2) Petra Christian University
(3) Petra Christian University
(*) Corresponding Author

Abstract


Fairing is an aircraft component which is responsible in reducing drag force. By reducing
the coefficient of drag, drag force will be reduced and aircraft fuel consumption will be leaner. A
bump fairing FX2 was designed by Vassberg for DLR-F6 aircraft. The design process doesn’t
involve coefficient of drag effect. This research focuses in optimizing bump fairing FX2 by reducing
the coefficient of drag produced for DLR-F6 aircraft. Optimization was done by changing the
dimension value of chord, span and thickness. Optimization method used in this research was 2k
factorial Design of Experiment (DoE) with Computational Fluid Dynamic (CFD) for acquiring
data.
The result of the research shows that bump fairing FX2 can be optimized, although not by
utilizing the 2k

factorial design of experiment. This is caused by the assumption of linear function
in 2k factorial. In this research, it was discovered that the function of chord, span and thickness
related to coefficient of drag is non-linear. Even though 2k

factorial was unable to be used to
optimize bump fairing FX2, the results are able to show correlation between variables and which
variable are important. The highest reduction of coefficient of drag value was achieved by 8.75
drag count.


Keywords


Coefficient of Drag, Design of Experiment, Design Optimization, Aerodynamic, Fairing, Computational Fluid Dynamic

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References


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