DEVELOPMENT OF A HELICAL-TYPE VERTICAL AXIS WIND TURBINE PROTOTYPE UNDER URBAN WAKE CONDITIONS

Abstract

Urban environments are characterized by complex wake flows generated by buildings and moving vehicles, which significantly affect wind energy harvesting performance. This study presents the development of a helical-type Vertical Axis Wind Turbine (VAWT) prototype designed to operate under urban wake conditions. The prototype was designed, fabricated, and evaluated to analyze its aerodynamic behavior and performance when subjected to disturbed and unsteady airflow. Computational Fluid Dynamics (CFD) simulations were employed to investigate the velocity and pressure distribution around the helical blades under wake flow conditions representative of urban environments. The results indicate that the helical blade configuration improves flow continuity and reduces torque fluctuations compared to conventional straight-bladed VAWTs. Furthermore, the turbine demonstrates improved self-starting capability and stable performance under low and fluctuating wind speeds. This research highlights the potential of helical-type VAWTs as a viable solution for small-scale wind energy harvesting in urban areas.