Theoretical study of the energy harvesting of a cantilever with attached prism under aeroelastic galloping

The aeroelastic galloping of a cantilever with attached prism has recently attracted the attention of several researchers as a way to harvest energy from an airstream. This arrangement is not entirely analogous to that of classical Transverse Galloping (TG) since the instantaneous attitude of the galloping body (prism) with respect to the incident flow depends both on the velocity of the galloping body and wind speed (like in TG) but also on the rotation angle at the cantilever free end. A new governing parameter emerges, namely the ratio of the cross-section length of the prism to the beam length δ, and its effect on the galloping dynamics and power output needs to be studied. To this end, a theoretical model is here developed where the influence of δ is considered.