Analysis and Design of a Giromill Type Vertical Axis Wind Turbine for a Low Wind Profile Urban Area

Abstract

This paper analyses the design parameters of
giromill type vertical axis wind turbine in QBlade and
Mat lab Simulink software with an appropriate practical
demonstration. The significant factors like Reynolds
number, numbers of blades, aspect ratio, and wake
module analysis were carried out to design a wind
turbine to enhance maximum power at 2 m/s wind speed.
The classical 4 digit symmetrical, unsymmetrical NACA
series airfoil are taken to analyze Glide ratio with
proposed D shaped airfoil and it produces high lift
forces at low wind speed. Based on the significant
results obtained a virtual VAWT model was constructed
in a Simulink which endorses QBlade analysis results.
Two VAWTs with an aspect ratio of 2.5 and 0.75 were
constructed with 1kW PMDC generator to validate the
simulation results. The results exhibit that the low aspect
ratio of 0.75, odd number blades like 3 or 5 with D
shaped airfoil enables to catch more downwind and it
improves the VAWT model has maximum energy
efficiency to 50.49 % more than the 2.5 high aspect ratio
wind turbines