Low Reynolds number response of a symmetric airfoil to viscous vortical gusts

Contents The database consist on a single ASCII file for each case. After a short, self-explanatory header, each file has 7 columns with the following data: time, t U∞/c cl: lift coefficient, cl cd: drag coefficient, cd cm: coefficient of moments with respect to c/4, cm dcl: perturbation of cl with respect to steady state value, ∆cl dcd: perturbation of cd with respect to steady state value, ∆cd dcm: perturbation of cm with respect to steady state value, ∆cm Reference time (t=0) is taken as the time at which the center of the vortical gust reaches the position of the leading edge of the airfoil (if advected at a velocity U∞).

Nomenclature The names of the files will follow the acronym t_AaYyDdVv.txt, where the lowecase letters are placeholders for: t Type of vortical gust T: Taylor, LO: Lamb-Oseen a Angle of attack α = [+8,0,-8] deg y Initial vertical position of the centre of the vortex h/c = [0,0.5,1] d Diameter of the core of the vortex D/c = [0.5,1,2] v Circumferential velocity v0m/U∞ = [0.1,0.3,1]