This work introduces a new recombination and a new mutation operator for an accelerated evolutionary algorithm in the context
of Pareto optimization. Both operators are based on a self-organizing map, which is actively learning from the evolution in
order to adapt the mutation step size and improve convergence speed. Standard selection operators can be used in conjunction
with these operators.
The new operators are applied to the Pareto optimization of an airfoil for minimizing the aerodynamic profile losses at the
design operating point and maximizing the operating range. The profile performance is analyzed with a quasi 3D computational
fluid dynamics (Q3D CFD) solver for the design condition and two off-design conditions (one positive and one negative incidence).
The new concept is to define a free scaling factor, which is multiplied to the off-design incidences. The scaling factor is
considered as an additional design variable and at the same time as objective function for indexing the operating range, which
has to be maximized. We show that 2 off- design incidences are sufficient for the Pareto optimization and that the computation
of a complete loss polar is not necessary. In addition, this approach answers the question of how to set the incidence values
by defining them as design variables of the optimization.