To address the need for a stable energy supply of wireless sensor networks (WSNs) nodes, a wind energy collector with a wind-induced bluff body cantilevering structure based on the flexoelectric effect was developed in this paper. Output power performances of the wind energy collector and its array were studied through numerical simulation and wind tunnel testing. The results show that the staggered array of energy harvesting arrays has advantages over the series array. Too small transverse spacing of arrays will inhibit the formation of shear flow on the downstream bluff body and thus weaken its vibration; too small longitudinal spacing of arrays will inhibit the vortex detachment of the upstream bluff body and reduce its amplitude. Reasonable selection of the array scheme of the energy collector can enhance the amplitude of the bluff body and improve the efficiency of the energy harvesting device array.