THE INFLUENCE OF FREE AND DISTURBED LAMINAR-TURBULENT TRANSITION FOR THE WORTMANN FX 66-S-196 V1 AND EPPLER E 385 AIRFOILS AT LOW REYNOLDS NUMBERS

Abstract

This work was carried out to compare theoretically calculated airfoil characteristics with the published measurements data. Furthermore, in this work the influence of free and disturbed laminar-turbulent transitions was analysed.

The calculation of the Wortmann FX 66‑S‑ 196 V1 and Eppler E 385 airfoils was made using three codes: Eppler program system PROFIL, XFOIL and RFOIL. The influence of boundary layer disturbed transition on airfoil was analyzed at low Reynolds numbers.

The calculated data were compared with published measurement data. The measurement data were obtained in low-speed, low turbulence wind tunnels of the Department of Aerospace Engineering at the Delft University of Technology and Institute of Aerodynamics and Gasdynamics at Stuttgart University.

DOI: http://dx.doi.org/10.5755/j01.mech.19.2.4158