Nomenclature

$b$		               wing span 

$c$		               chord length 

$c_l, c_d$		        lift- and drag coefficient

$c_l\,'$		          fluctuation of lift-coefficient

$c_p$		             pressure coefficient

$c_\mu, \beta_k$		  constants in the turbulence model

$f$		               frequency 

$h$		               height of the Gurney-flap 

$k$		               turbulent kinetic energy 

$L_{t}$		           turbulent length scale 

$Re$		              Reynolds number based on chord length

$St$		              Strouhal number based on Gurney height

$u_0$		             inflow velocity 

$x_{tr}$		          transition position

$y^+$		             non-dimensional wall-distance 

$\alpha$		          angle of attack

$\gamma$		          angle of downwash behind the airfoil

$\Delta t$		        time stepping 

$\lambda_2$		       second eigenvalue of strain/vorticity tensor 

$\omega$		          specific turbulent dissipation