Effect of Airfoil Parametrization on the Optimization of Counter Rotating Open Rotors
Paper in proceedings, 2019

The present study compares two optimizations performed on Counter Rotating Open Rotors (CRORs) running at the same operating condition. The main difference between the two optimizations is the airfoil profile used to construct the blades. The first, uses the NACA 16 family of airfoils, whereas the second one, uses a parametrized airfoil type, CST. Two independent multi-objective optimizations are carried out using approximately the same computational resources. All the design variables except those concerning the airfoil profile, are kept with the same design freedom so that a fair comparison can be made. Both sets of configurations are aerodynamically optimized for maximum thrust coefficient and efficiency at top of climb conditions. The optimization is performed using multi-objective Differential Evolution (DE) coupled with 3D RANS simulations and Radial Basis Function (RBF) meta-modeling.



evolutionary algorithms

multi-objective optimisation

differential evolution


Gonzalo Montero Villar

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Daniel Lindblad

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Niklas Andersson

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

AIAA Scitech 2019 Forum


AIAA SciTech 2019 Forum
San Diego, California, USA,

Areas of Advance


Subject Categories

Applied Mechanics

Computational Mathematics

Fluid Mechanics and Acoustics


C3SE (Chalmers Centre for Computational Science and Engineering)



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3/8/2021 1