A number of different Gurney-flap modifications have been investigated.
All of them are based on a Gurney-flap. Most of the geometries
are taken from the experimental study of Bechert et al. [7]
who investigated an HQ17 airfoil with a large variety of Gurney-flap
configurations with the aim of drag reduction. The
numerical meshes for these configurations are based on the same original
grid and therefore provide similar properties concerning number of cells,
resolution in the boundary layers and dimensions of the far field.
One example is the mesh for a configuration with stabilizer and wake
body in fig.
, right.