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ANALISA SUDU TURBIN ANGIN POROS HORIZONTAL BERDASARKAN PERTIMBANGAN EFEK AERODINAMIS
Today, wind turbine development has stepped forward through new level of horizon. One way to improve the efficiency of wind turbine is to modification of the airfoil that is used in blade design to optimize its aerodynamic performances. To analyze the aerodynamic performances required careful analysis. One methode that effectivelly used to get better aerodynamic performances analyses of a wind turbine blade design is Blade Element Momentum Theory (BEMT). The analyze and simulation adopted in this study is directed to get into a deep understanding of aerodynamics performances (such as power, power coefficient, and average power) between AWT-27 blade (baseline) and the AWT-27 blade with S809 airfoil uniformity. In these analyze and simulation the analysis tools has made base on BEMT and has developed using of MATLAB sotfware is used those. The results of these analyze and simulation of both design is compared each other. The result shows that, in terms of power and power coefficient, the AWT - 27 blades (S809 airfoil) has slightly better aerodynamic performances than AWT-27 blade (baseline) at 5 m/s to 8 m/s wind speed. Unfortunately, for wind speed 9 m/s to 25 m/s, the AWT-27 blade (S809 airfoil) has worse aerodynamic performances than AWT-27 (baseline). If the terms of the average power generated, AWT-27 blade (baseline) produced 74.21 kW while the AWT-27 blade (S809 airfoil) resulted in 65.98 KW. From these results it can be seen the reduction of the average power generated by the AWT-27 blade (S809 airfoil) of -8.23 KW.. This is because the characteristics of the S809 airfoil ( CL and CD distribution at various angles of attack ) is less suited to the distribution of the angle of attack at any point along the AWT-27 blades. From the data of analyze and simulation, it can be concluded that the uniformed of S809 airfoil is less effective to applied on the AWT-27 blade because its will decrease aerodynamic performances of the blades.
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