NUMERICAL APPROACH OF THE BLADE SHAPE AND NUMBER ON THE PERFORMANCE OF MULTIPLE BLADE CLOSED TYPE IMPULSE WIND TURBINE

An impulse turbine uses drag force on its blades to produce torque rotor. As fluid flows over the blades, pressure changes occur at nozzle, which increases fluid's velocity and reduces static nozzle outlet. The high-momentum then impinges rotor generating frictional resulting in production. To study impact of blade shape number turbine's performance, simulations were conducted. results indicate that with an angle 0° 180° are optimal for creating high-pressure vortices concave surface blade. Addition-ally, more always result higher power out-put by increasing active area blades. However, case 180°, 8 produced than 12 90°. There-fore, highly effective producing torque.