Análise do comportamento mecânico de uma pá compósita usada em turbinas hidrocinéticas

The proje tions related to the global demand of ele tri ity show a very high growth in onsumption in the oming de ades. It has been show that this onsumption will in rease by 93 % in 2040 ompared to the one in 2010. Currently, more than 60 % of the energy onsumed omes from fossil fuels, whi h are limited resour es and highly harmful to the environment. In this ontext, the use of hydrokineti turbines operating with the ow of the rivers is an ex ellent hoi e, as they have great predi tability and high power density. The main obje tive of this work is the design of a omposite blade to be used in a horizontal axis hydrokineti whi h an generate 500 kW of ele tri ity with Tu urui's river ow in Pará state. This turbine has a rotor with three blades and a nominal diameter of 10 m. Two blades analyses were perfomed: the rst one manufa tured with arbon/epoxy unidire tional reinfor ed prepreg laminas type AS4/3501-6 and the se ond one made with 6061-T6 aluminum alloy. Results were obtained using ANSYS, reputed nite element analysis (FEA) software. Masters nodes and restrained equations were used to apply the hydrodynami loading. The maximum failure index established for the omposite and metalli blades were respe tively 0.5 a ording to Tsai-Wu and 0.5 a ording to von Mises. The masses obtained for the omposite and metalli blades were 221.87 kg and 709.16 kg, respe tively. The maximun de e tion at the blade tip were 5.65 m for the omposite blade and 2.45 m to the metalli blade.