A finite-span wing is tested for ground-effect aerodynamics in a multi-fan open jet facility over a stationary ground. A multi-fan facility enables a fine control of the ground boundary layer morphology through a suitable modulation of each individual fan speeds. Particle Image Velocimetry (PIV) is used to quantify the boundary layer growth: an iterative process is then used between the PIV measurements and the fan speeds until the desired boundary layer profile is reached. An adequately-shaped plate leading edge has also contributed to a satisfactory boundary layer profile. The open jet configuration makes a proper PIV seeding difficult to achieve. A suitable seeding device and data acquisition methodology has been developed. PIV was finally used to characterize the flow around an airfoil close to the ground. The results give some remarkable insights onto the mechanisms occurring in ground effect.