Abstract
A micro wind-power generation unit driven by longitudinal vortex induced vibration that is used for a power supply of stand-alone sensor is investigated. In this work, a module that has 4cm x 4cm in the inner cross section is tested. A oscillator cylinder is 6mm diameter and the splitter-plate to induced the longitudinal vortices is 6mm in width. Two sizes of the height of the splitter-plate are tested to evaluate the effect of block ratio, which is the ratio of a cylinder and a wake plate to the channel cross section. The necklace vortex induced vibration is not strongly generated in both splitter-plates. However, a new type of vibration is observed in s/d>1.00, here s the gap between the cylinder and the splitter-plate and d is the diameter of the cylinder. In this state, the shorter height splitter-plate generates lager amplitude of the oscillation. The block ratio for the shorter and longer splitter-plate are 0.18 and 0.23, respectively, and it is not serious deference to induce the deference of the amplitude. Therefore, the geometrical effect of the splitter-plate or wall effect would be dominated.
