One of the succeeded methods to enhance performance horizontal axis wind turbine (HAWT) is an attaching a winglet blades tip. The current paper study effect four key parameters that are used describe on which height H%R, cant angle θ, twist β, and taper ratio Λ. A five design cases for each geometric were numerically investigated using computational fluid dynamics (CFD) by ANSYS18.1 software, t...

The forces on a turbine at extreme wind conditions when the turbine is parked is one of the most important design cases for the survivability of a turbine. In this work, the forces on a blade and its support arms have been measured on a 12 kW straight-bladed vertical axis wind turbine at an open site. Two cases are tested: one during electrical braking of the turbine, which allows it to rotate ...

The Savonius wind turbine is a type of vertical axis wind turbine (VAWTs) that is simply composed of two or three arc-type blades which can generate power even under poor wind conditions. A modified Savonius wind turbine with novel blade shapes is introduced with the aim of increasing the power coefficient of the turbine. The effect of blade fullness, which is a main shape parameter of the blad...

Owing to concern over the environment, there is much interest in renewable sources of energy, one of the most promising of which is wind power. Wind power is not yet a mature technology and one of the issues to be resolved is the most effective manner in which to regulate the wind turbines are posed by the different wind turbine configurations. A variety of control design tasks with differing o...

The blades of a vertical axis wind turbine (VAWT) rotor see an inconsistent angle of attack through its rotation. Consequently, VAWT blades generally use symmetrical aerofoils with a lower lift-to-drag ratio than cambered aerofoils tailored to maximise horizontal axis wind turbine rotor performance. This paper considers the feasibility of circulation controlled (CC) VAWT blades, using a tangent...