Characterizing the Helical Vortex Frequency of HAWT

To fulfil the growing energy demand with sustainable source and ensuring the preview of environmentally friendly generation, wind energy plays a vital role in providing the same with eco-friendly perspective. In present era of high tech, booming industrialization, population growth and global collaborations, there is drastic increase in energy demand. Wind energy being the source of highest renewable energy in India has the ability to provide efficiently because of vast ability of wind flow across the globe. For large-scale energy demand, designing and forecasting proper layout of wind farm is of great interest by many researchers and because of the unsteadiness in wind flow, annual flow variation, atmospheric boundary layer effects, seasonal climatic change and most importantly the effect of wake flow downstream of wind turbine in subsequent arrays of turbine makes the wind farm modelling a difficult task. So present article highlights the work carried out in wind tunnel defining the significance of tip vortex frequency response and velocity deficit near rotor plane further to understand the wake flow downstream of HAWT (Horizontal axis wind turbine) and subsequently designing of efficient wind farm for various flow conditions.