Author: David Malcolm and Olamide Ajala-InyangPublication: Journal of PhysicsYear Published: 2024 Abstract. This paper describes a project for predicting and measuring the structural response of a 70 kW vertical axis wind turbine (VAWT), while offering insights for optimizing efficiency and ensuring longevity. We employ the traditional frequency response approach and model the turbine behavior using…
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: K. McLaren, S. Tullis and S. ZiadaPublication: McMaster UniversityYear Published: 2007 The motivation for this project arose from an expected vibration source of a small-scale vertical axis wind turbine currently undergoing field-testing. The turbine consists of three 3-metre long vertically aligned blades each fixed to the central shaft by two horizontal arms and separated…
Author: David MalcolmPublication: Wind Harvest InternationalYear Published: 2017
Author: Thomas Carne, D.R. Martinez, S.R. IbrahimPublication: Sandia National LaboratoriesYear Published: 1983 A new testing technique and the Ibrahim time domain (ITD) modal identification algorithm have been combined, resulting in a capability to estimate modal parameters for rotating blade systems. This capability has been evaluated on the Sandia two-meter, vertical-axis wind turbine. Variation in modal…
Author: David MalcolmPublication: Engineering StructuresYear Published: 1988 A method is presented for the frequency response analysis of a Darrieus rotor wind turbine subject to turbulent flow. A number of time series vectors of longitudinal and lateral turbulent velocities are generated and the interaction with a two-bladed rotor is carried out with a double multiple streamtube…