Passive Stall Control Systems of Power Limitation Modes for Vertical Axis Wind Turbines (VAWT)

Aerodynamic, Computer Modeling

Author: Ihor Shchur, Andrii Lozinskyi, Bohdan Kopchak, Yurii Biletskyi, Vsevolod ShchurYear Published: 2017 Vertical axis wind turbines (VAWT) with direct drive permanent magnet synchronous generator operate with the greatest energy efficiency and reliability in low-power wind energy conversion systems (WECS). This article offers a classification of optimal control methods of such WECS. Special attention is…

Parametrical evaluation of the aerodynamic performance of vertical axis wind turbines for the proposal of optimized designs

Aerodynamic, Computer Modeling

Author: Andrés Meana-Fernández, Irene Solís-Gallego, Jesús Manuel Fernández Oro, Katia María Argüelles Díaz, Sandra Velarde-SuárezPublication: EnergyYear Published: 2018 Many studies have tried to give insight into the optimal values of solidity and the airfoil geometry that maximize the performance and self-starting capability of vertical axis wind turbines, but there is still no consensus. In addition,…

Observations of dynamic stall on Darrieus wind turbine blades

Aerodynamic, Computer Modeling

Author: Noboyuki Fujisawa, Satoshi ShibuyaPublication: J. Wind Eng. and Industrial AerodynamicsYear Published: 2001 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. The experiment is carried out using the small-scale Darrieus wind turbine in a…

Numerical Simulation of VAWT Stochastic Aerodynamic Loads Produced by Atmospheric Turbulence

Aerodynamic, Computer Modeling

Author: Gregory HomiczPublication: Sandia National LaboratoriesYear Published: 1991 Blade fatigue life is an important element in determining the economic viability of the Vertical Axis Wind Turbine (VAWT). A principal source of blade fatigue is thought to be the stochastic (i.e., random) aerodynamic loads created by atmospheric turbulence. This report describes the theoretical background of the…

Numerical Investigations of the Effects of the Rotating Shaft and Optimization of Urban Vertical Axis Wind Turbines

Aerodynamic, Computer Modeling

Author: Lidong Zhang, Kaiqi Zhu, Junwei Zhong, Ling Zhang, Tieliu Jiang, Shaohua Li and Zhongbin ZhangPublication: EnergiesYear Published: 2018 The central shaft is an important and indispensable part of a small scale urban vertical axis wind turbines (VAWTs). Normally, it is often operated at the same angular velocity as the wind turbine. The shedding vortices…

New blade configuration promotes peak power efficiency of vertical axis wind turbines

Aerodynamic, Computer Modeling

Author: Chris PatrickYear Published: 2017 Horizontal axis wind turbines (HAWTs) are the more common form of wind energy production, but attention is increasingly given to vertical axis wind turbines (VAWTs), which have their main rotor shaft positioned transverse the wind. VAWTs can accept wind coming from any direction and operate in harsher wind conditions. However,…

Multi-Body Unsteady Aerodynamics in 2D Applied to a Vertical-Axis Wind Turbine Using a Vortex Method

Aerodynamic, Computer Modeling

Author: David OsterbergPublication: Uppsala UniversitetYear Published: 2010 Vertical axis wind turbines (VAWT) have many advantages over traditional Horizontal axis wind turbines (HAWT). One of the more severe problem of VAWTs are the complicated aerodynamic behavior inherent in the concept. In contrast to HAWTs the blades experience varying angle of attack during its orbital motion. The…

Modeling Stochastic Wind Loads on Vertical Axis Wind Turbines

Aerodynamic, Computer Modeling

Author: Paul VeersPublication: Sandia National LaboratoriesYear Published: 1984 The Vertical AXIS Wind Turbine (VAWT) is a machine which extracts energy from the wind. Since random turbulence is always present, the effect of this turbulence on the wind turbine fatigue life must be evaluated. This problem is approached by numerically simulating the turbulence and calculating, In…