PERFORMANCE ANALYSIS OF DIFFUSER AUGMENTED HORIZONTAL AXIS WIND TURBINE.

Diffuser augmented horizontal axis wind turbine design with a diffuser ring with a broad-ring flange at the exit periphery and a wind turbine inside it. diffuser ring helps for collecting and accelerating the approaching wind into wind turbine. The diffuser ring generates a low-pressure region in the exit neighborhood of the diffuser by vortex formation and draws more mass flow to the wind turbine inside the diffuser ring. To obtain a higher power output of the diffuser augmented wind turbine we have examined the optimal form of the flanged diffuser ring wind turbine. As a result a shrouded wind turbine equipped with a flanged diffuser has been developed and demonstrated power augmentation for a given turbine diameter and wind speed which is increased as compared to a standard (bare) wind turbine. In a field experiment using a three bladed wind turbine with a flanged diffuser shroud the output performance improved from standard (bare) wind turbine. The effect of diffuser?s shape performance greatly influenced and maximum wind speed increased 1.7 times with the selection of the appropriate diffuser shape. We conducted field tests using a real examination device with a diffuser and confirmed that the output power of the wind power generator increased by up to two times compared to that of a conventional turbine.