Dynamic stall in vertical axis wind turbines: scaling and topological considerations

  title={Dynamic stall in vertical axis wind turbines: scaling and topological considerations},
  author={A-J. Buchner and Julio Soria and Damon R. Honnery and Alexander J. Smits},
  journal={Journal of Fluid Mechanics},
  pages={746 - 766}
Vertical axis wind turbine blades are subject to rapid, cyclical variations in angle of attack and relative airspeed which can induce dynamic stall. This phenomenon poses an obstacle to the greater implementation of vertical axis wind turbines because dynamic stall can reduce turbine efficiency and induce structural vibrations and noise. This study seeks to provide a more comprehensive description of dynamic stall in vertical axis wind turbines, with an emphasis on understanding its parametric… Expand
Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations
Vertical axis wind turbines have several attractive features in the context of energy production in urban areas, but the inherent aerodynamic complexity of the flow around them has challenged theirExpand
The effects of inflow conditions on vertical axis wind turbine wake structure and performance
Abstract The behavior of wind turbines wakes is of considerable interest, especially in the context of wind farms where wake-turbine interactions are important. Here we investigate experimentally theExpand
Influence of Tip Speed Ratio on wake features of a Vertical Axis Wind Turbine
Abstract Dependence of wake features of a Vertical Axis Wind Turbine (VAWT) on Tip Speed Ratio ( T S R ) is studied in the present work, using a computational approach, based on Large-Eddy SimulationExpand
A critical analysis of the stall onset in vertical axis wind turbines
Abstract The dynamic stall phenomenon in Vertical Axis Wind Turbines (VAWTs) appears under some operating conditions that have not been very well established. Some studies have focused on describingExpand
Towards optimal aerodynamic design of vertical axis wind turbines: Impact of solidity and number of blades
The current study systematically analyzes the impact of solidity (σ) and number of blades (n) on the aerodynamic performance of 2-, 3- and 4-bladed Darrieus H-type vertical axis wind turbinesExpand
Dynamic Stall of a Vertical-Axis Wind Turbine and Its Control Using Plasma Actuation
In this paper, a dynamic stall control scheme for vertical-axis wind turbine (VAWT) based on pulsed dielectric-barrier-discharge (DBD) plasma actuation is proposed using computational fluid dynamicsExpand
Effect of vortices on power output of vertical axis wind turbine (VAWT)
Abstract Performance of a vertical axis wind turbines (VAWTs) is a major focus of research these days. The present research focuses on numerical investigate the performance of a VAWT in the presenceExpand
Active flow control for power enhancement of vertical axis wind turbines: Leading-edge slot suction
Vertical axis wind turbines (VAWTs) suffer from a poor power performance at low tip speed ratios, where their blade aerodynamics are dominated by unsteady separation and dynamic stall. Therefore, toExpand
High-resolution numerical investigation into the effects of winglet on the aerodynamic performance for a three-dimensional vertical axis wind turbine
Abstract Vertical axis wind turbines can harvest kinetic energy in the air stream from all directions and therefore have distinct advantages in the effective utilization of wind resource. ItsExpand
Near-Wake Dynamics of a Vertical-Axis Turbine
Cross-flow, or vertical-axis, turbines are a promising technology for capturing kinetic energy in wind or flowing water and their inherently unsteady fluid mechanics present unique opportunities forExpand


Scaling of vertical axis wind turbine dynamic stall
Vertical axis wind turbines (VAWT) are an alternative to horizontal axis wind turbines (HAWT) for wind and tidal energy harvesting applications. Studies of vertical axis wind turbines have heavilyExpand
Dynamic stall in vertical axis wind turbines: comparing experiments and computations
Abstract Dynamic stall is often found in unsteady aerodynamic flows where the angle of attack can vary over a large range. It is of particular interest in the context of vertical axis wind turbines,Expand
Visualization by PIV of dynamic stall on a vertical axis wind turbine
The aerodynamic behavior of a vertical axis wind turbine (VAWT) is analyzed by means of 2D particle image velocimetry (PIV), focusing on the development of dynamic stall at different tip speedExpand
Effect of dynamic stall on the aerodynamics of vertical-axis wind turbines
Accurate simulations of the aerodynamic performance of vertical-axis wind turbines pose a significant challenge for computational fluid dynamics methods. The aerodynamic interaction between theExpand
The effect of tip speed ratio on a vertical axis wind turbine at high Reynolds numbers
This work visualizes the flow surrounding a scaled model vertical axis wind turbine at realistic operating conditions. The model closely matches geometric and dynamic properties—tip speed ratio andExpand
Experimental and theoretical study of wind turbine wakes in yawed conditions
This work is dedicated to systematically studying and predicting the wake characteristics of a yawed wind turbine immersed in a turbulent boundary layer. To achieve this goal, wind tunnel experimentsExpand
Circulation production and shedding from vertical axis wind turbine blades undergoing dynamic stall
Dynamic stall of vertical axis wind turbine blades strongly affects the efficiency of vertical axis wind turbines, especially at low tip speed ratios. Here we report measurements using stereoscopicExpand
Design of a vertical-axis wind turbine: how the aspect ratio affects the turbine’s performance
This work analyses the link between the aspect ratio of a vertical-axis straight-bladed (H-Rotor) wind turbine and its performance (power coefficient). The aspect ratio of this particular windExpand
Experimental and Computational Wake Characterization of a Vertical Axis Wind Turbine
This work visualizes the wake of a vertical axis wind turbine (VAWT) both experimentally and computationally. In the experiments, a scale VAWT model is placed inside a wind tunnel under a controlledExpand
Observations of dynamic stall on Darrieus wind turbine blades
Flow field around a Darrieus wind turbine blade in dynamic stall is studied by flow visualization and particle image velocimetry (PIV) measurement in stationary and rotating frames of reference. TheExpand