Author: S. Brusca, R. Lanzafame, M. MessinaPublication: Int J Energy Environ EngYear Published: 2014 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 wind turbine is defined as the ratio between blade length and rotor radius. Since…
Author: Chaianant Sranpat, Suchaya Unsakul, Premchai Choljararux, Thananchai LeephakpreedaPublication: Energy ProcediaYear Published: 2017 This paper presents effects of design factors on mechanical performances of Vertical Axis Wind Turbines (VAWTs), which are suitable to low wind speeds conditions in Thailand. Potential VAWTs models are numerically analyzed within virtual wind tunnels at low wind speeds by utilizing…
Author: Matthias Kinzel, Daniel Araya and John DabiriPublication: Physics of FluidsYear Published: 2015 Experimental results from three different full scale arrays of vertical-axis wind turbines (VAWTs) under natural wind conditions are presented. The wind velocities throughout the turbine arrays are measured using a portable meteorological tower with seven, vertically staggered, three-component ultrasonic anemometers. The power…
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…
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: Mohammad BasharPublication: Georgia Southern UniversityYear Published: 2014 Wind alone can fulfill most of the energy requirement of the world by its efficient conversion in to energy. Though Horizontal Axis Wind Turbine (HAWT) is more popular but needs high wind speed to generate energy. On the other hand Vertical Axis Wind Turbine (VAWT) needs low…
Author: Erik Mollerstrom, Fredric Ottermo, Jonny Hylander and Hans BernhoffPublication: EnergiesYear Published: 2015 The noise emission from a vertical axis wind turbine (VAWT) has been investigated. A noise measurement campaign on a 200 kW straight-bladed VAWT has been conducted, and the result has been compared to a semi-empirical model for turbulent-boundary-layer trailing edge (TBL-TE) noise.…