Technological optimization of an airfoil for minimum drag operation at low Reynolds numbers

Debates were produced around the Dolphin airfoil, to prove the efficiency of this design concept at supersonic speeds. The application for aircraft low take-off and landing speeds or enhanced operational efficiencies of air compressors were only mentioned, while the manufacturing technology was not considered at all. The goal of the present work is to introduce design and technological improvements of dihedral profiles for aircraft low speed operation. The attention is also focused on vanes and blades applications, e.g. in the heat exchanger of the aeroacoustic wind tunnel WINNDER, a new concept of the authors for aeroacoustics and energy generation. Due to a common research of the University "POLITEHNICA" in Bucharest and of Texas A&M University, USA, computer simulations are presented in support of the newly optimized profile with good drag characteristics at very low speeds. Conclusions are drawn for incorporating these airfoils in various industrial applications.