Author: Dr. David MalcolmPublication: Wind Harvest InternationalYear Published: 2023 This report brings together much of the structural and performance data from the operation of the Wind Harvester 3.1. The response at three of the sensors is examined in detail (the lower mast bending, lower mast torque, the bending in the middle of the upper blade,…
Author: David Marten, Matthew Lennie, Georgios Pechlivanoglou, Christian Oliver Paschereit, Norbert Dy, Ion Paraschivoiu, Farooq SaeedPublication: Wind Energy SymposiumYear Published: 2017 The open source simulation code QBLADE, based on a Lifting Line Free Vortex Wake formulation to evaluate the unsteady aerodynamics, recently integrated the PROJECT-CHRONO FEA library that, by using Euler-Bernoulli beams in a corotational…
Author: Dale BergPublication: Sandia National LaboratoriesYear Published: 2016 This slide deck was present to Delft Technical University by Dale Berg who was a principal researcher of the Darrieus type VAWTs that Sandia National Laboratories worked on from the 1970s through the 1990s. It covers the history of Sandia’s work on VAWTs including their efforts to…
Author: Torben Juul Larsen and Helge Aagaard MadsenPublication: European Wind Energy AssociationYear Published: 2013 In this paper a method for an implementation of a 2D actuator cylinder flow model of an Vertical Axis Wind Turbine (VAWT) is presented. The model is implemented in a full aeroelastic code including consideration of structural dynamics, dynamic inflow, tower…
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…