E FFECT OF THE GAP BETWEEN A CANTILEVERED RECTANGULAR PRISM AND A SPLITTER PLATE ON THE PERFORMANCE OF A MAGNETOSTRICTIVE FLOW INDUCED VIBRATION POWER GENERATOR

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The effects of the span length of the prism, and the gap between the splitter plate and the prism on the performance of the vibrational power generator by the flow induced vibration and the magnetostrictive material were investigated with the w ind tunnel experiment. The splitter plate was added to improve the performance of a vibrational power generator with a cantilevered rectangular prism and a side ratio D H of 0.4 (where D is the depth of the prism in the flow direction and H is the height o f the prism). The span length L of the rectangular prism was 200 mm and 300 mm. The high speed galloping vibration occurs in cases with a small gap. The vibration onset flow velocity and power generation are affected by the span length of the prism. As t he long span rectangular prism (i.e., L = 300mm) has a low characteristic frequency and starts to vibrate at a low wind velocity, this prism has a wide range of wind velocity for power generation as compared with the short span prism (i.e., L = 200 mm).