Author: Brian Owens, Daniel GriffithPublication: Sandia National LaboratoriesYear Published: 2014 A vertical-axis wind turbine (VAWT) rotor configuration offers a potential transformative technology solution that significantly lowers cost of energy for offshore wind due to its inherent advantages for the offshore market. However, several potential challenges exist for VAWTs and this paper addresses one of them…
Author: Brian Owens, John Hurtado, Joshua Paquette, Daniel Griffith, Matthew BaronePublication: Sandia National LaboratoriesYear Published: 1986 The availability of offshore wind resources in coastal regions makes offshore wind energy an attractive opportunity. There are, however, significant challenges in realizing offshore wind energy with an acceptable cost of energy due to increased infrastructure, logistics, and operations…
Author: Donald Lobitz, Thomas AshwillPublication: Sandia National LaboratoriesYear Published: 1986 Aeroelastic effects impact the structural dynamic behavior of vertical axis wind turbines (VAWTs) in two major ways. First, the stability phenomena of flutter and divergence are direct results of the aeroelasticity of the structure. Secondly, aerodynamic damping can be important for predicting response levels, particularly…
Author: Andreu Carbó Molina, Gianni Bartoli, Tim de TroyerPublication: Elsevier Ltd.Year Published: 2017 This study presents an innovative wind tunnel approach to evaluate the efficiency of Vertical-Axis Wind Turbines (VAWT) in turbulent flows, to study their integration in urban environments. The first part of the research is devoted to obtaining highly-turbulent wind profiles in the…
Author: Jonathan Edwards, Naveed Durrani, Robert Howell and Ning QinPublication: Renewable EnergyYear Published: 2010 This paper presents a combined experimental and computational study into the aerodynamics and performance of a small scale vertical axis wind turbine. Wind tunnel tests were carried out to ascertain overall performance of the turbine and two and three dimensional unsteady…
Author: David MalcolmYear Published: 2017 The vertical axis wind turbine was “re-invented” in 1970 by Peter South and Raj Rangi [1] of the Canadian National Research Council, Ottawa, where much development was carried out. Considerable development was also carried out at Sandia National Laboratories, New Mexico, especially into the structural dynamics of the curved Darrieus…
Author: Du Gang, Wu Chun KauPublication: Elsevier Ltd.Year Published: 2015 This paper sets up model of the flow field for vertical axis wind turbine based on airfoil DU93-W 210. FLUENT is used to solve the two dimensional unsteady incompressible N-S equations with RNG κ ε turbulence model. COUPLE algorithm and sliding mesh is used to…
Author: Abdolrahim Rezaeiha, Hamid Montazeri, Bert BlockenPublication: Elsevier Ltd.Year Published: 2017 The accuracy of CFD simulations of vertical axis wind turbines (VAWTs) is known to be significantly associated with the computational parameters, such as azimuthal increment, domain size and number of turbine revolu- tions before reaching a statistically steady state condition (convergence). A detailed review…
Author: Luis PrieguePublication: Thorsten Stoesser Elsevier LtdYear Published: 2017 This paper reports the findings of an experimental study investigating the influence of blade roughness on the performance of a vertical axis tidal turbine. Due to their design, vertical axis turbines undergo periods of stall, i.e. flow separation from the blade, during each revolution. It is…
Author: Choon-Man Jang, Chul-Kyu Kim, Sang-Moon Lee, Sajid AliYear Published: 2018 Recently, small vertical axis wind turbine has been in the limelight as an essential component of hybrid renewable energy system, based on many advantages, such as low noise and cut-in wind speed, cost and site flexibility, etc. Turbine performance is analyzed by introducing the…