03.2 - Experimental Aerodynamics
EXPERIMENTAL STUDY OF GROUND EFFECT ON A HEAVING NACA0012 AEROFOIL
M. Li¹, M.A. Legovich, Cranfield University, United Kingdom; N.J. Lawson¹; ¹The University of Sydney, Australia
Unsteady aerodynamics in ground effect plays an important role in a wide range of engineering systems. For a stationary aerofoil, decreasing ground clearance leads to an initial increase in the normal force, followed by a reduction due to viscous effects. In this work, we specifically focus on the effect of ground proximity on dynamic stall. An experimental investigation of a heaving NACA0012 aerofoil operating in ground effect is conducted using stereo particle image velocimetry and unsteady surface pressure measurements. Force hysteresis over an oscillation cycle is examined, and correlated with the measured velocity fields, providing insight into the interaction between vortical structures and the ground plane.