Experimental and numerical investigation of a three-dimensional vertical-axis wind turbine with variable-pitch

Numerical Study of Two Vertical Axis Wind Turbines Darrieu Type Lined Up in Function of Power Coefficient1

“…The average power ratio obtained for the independent mesh selected is Ct = 0.1428, which compared to the study of Elkhoury et al (2015), whose Ct = 0.1621, is approximately 12%. This difference can be related with the simplification imposed, since the model Elkhoury (2015) uses a 3D mesh model and an in this study it is used a two-dimensional domain (2D) with a refined mesh.…”

“…These advantages are mainly due to various reasons, the most important fact is the VAWTs' ability to work in a multidirectional flow of wind that could continuously change in residential areas. Unlike HAWTs, VAWTs do not need a yaw control mechanism and respond instantly to change in wind speed and direction, which in turn makes them more efficient in turbulent flow regions (Elkhoury et al, 2015).…”

“…1. The case configurations is similar to those studied in Elkhoury et al (2015) which used a length 11 times the diameter of the rotor.…”

“…For the boundary conditions, it is used similar conditions imposed by Elkhoury et al (2015), as showed in Fig. 1.…”

Experimental performance analysis of biplane VAWT configurations

“…They reported an increase of around 30 to 35% in torque and power coeffi cients. M. Elkhoury et al [14] realized a combined experimental and numerical investigation on a micro vertical-axis wind turbine (VAWT) with variable-pitch to assess the effect of wind speed, airfoil shape, and variable-pitch mechanism on the performance of turbine. The performances of 4-bladed H-Darrieus rotor including different symmetrical and unsymmetrical NACA 4 digit profi les with varying conditions of rotor radius, pitch angle etc was investigated by El-Samanoudy et al [15].…”