Mesh Convergence Study for 2-D Straight-Blade Vertical Axis Wind Turbine Simulations and Estimation for 3-D Simulations

Aerodynamic, Computer Modeling

Author: Saman Naghib Zadeh, Matin Komeili and Marius ParaschivoiuPublication: Concordia UniversityYear Published: 2014 Mesh resolution requirements are investigated for 2-D and 3-D simulations of the complex flow around a straight-blade vertical axis wind turbine (VAWT). The resulting flow, which may include large separation flows over the blades, dynamic stall, and wake-blade interaction, is simulated by…

Measurements and Calculations of Aerodynamic Torques for a Vertical Axis Wind Turbine

Aerodynamic, Computer Modeling

Author: Robert Akins, Dale Berg, W. Tait CyrusPublication: Sandia National LaboratoriesYear Published: 1987 This report describes measurements of aerodynamic torque on a vertical-axis wind turbine. Accelerometers mounted at the equator of the rotor and a torque meter mounted at the base of the rotor were used to compute the net aerodynamic torque acting on the…

Location of aerodynamic noise sources from a 200kW vertical-axis wind turbine

Aerodynamic, Computer Modeling

Author: Fredric Ottermo, Erik Mollerstrom, Anders Nordborg, Jonny Hylander, Hans BernhoffPublication: J. Sound and VibrationYear Published: 2017 Noise levels emitted from a 200 kW H-rotor vertical-axis wind turbine have been measured using a microphone array at four different positions, each at a hub-height distance from the tower. The microphone array, comprising 48 microphones in a…

Fish schooling as a basis for vertical axis wind turbine farm design

Aerodynamic, Computer Modeling, Miscellaneous, Synergy with Tall and Short Turbines

Author: Robert Whittlesey, Sebastian Liska, and John DabiriPublication: California Institute of TechnologyYear Published: 2010 Most wind farms consist of horizontal axis wind turbines (HAWTs) due to the high power coefficient (mechanical power output divided by the power of the free-stream air through the turbine cross-sectional area) of an isolated turbine. However when in close proximity…

Effect Of The Shaft On The Aerodynamic Performance Of Urban Vertical Axis Wind Turbines

Aerodynamic, Computer Modeling

Author: Abdolrahim Rezaeiha, Ivo Kalkman, Hamid Montazeri, Bert BlockenPublication: Elsevier Ltd.Year Published: 2017 The central shaft is an inseparable part of a vertical axis wind turbine (VAWT). For small turbines such as those typically used in urban environments, the shaft could operate in the subcritical regime, resulting in large drag and considerable aerodynamic power loss.…

Effects of the Reynolds Number and the Tip Losses on the Optimal Aspect Ratio of Straight-Bladed Vertical Axis Wind Turbines

Aerodynamic, Computer Modeling

Author: Stefania Zanforlin, Stefano DelucaYear Published: 2018 Aspect Ratio (AR) is one of the main design parameters of straight-bladed vertical axis turbines. This paper will examine whether a high AR, with long blades and low tip losses, or a low AR, with a higher diameter and higher losses, is more suitable to achieve the maximum…

Effects of optimized airfoil on vertical axis wind turbine aerodynamic performance

Aerodynamic, Computer Modeling

Author: Changping Liang, Huaxing LiYear Published: 2018 This paper investigates the effects of optimized airfoil on VAWT (vertical axis wind turbine) aerodynamic performance. The thickness and camber of the airfoil are selected as the constraints, the value of the maximum tangential force coefficient is chosen as the objective function, optimizing NACA0015 airfoil to enhance the…

Computational and Experimental Study on Vertical Axis Wind Turbine In Search For An Efficient Design

Aerodynamic, Computer Modeling, Design, Engineering

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…

Comparison of inflow-tubulence and trailing-edge noise with measurements of a 200-kW vertical axis wind turbine

Aerodynamic, Computer Modeling

Author: Erik Mollerstom and Fredric OttermoPublication: J. Physics: Conference SeriesYear Published: 2019 Models of inflow-turbulence noise and turbulent-boundary-layer trailing-edge noise are compared to earlier measurements of a 200-kW vertical axis wind turbine so that conclusions regarding the origin of the aerodynamic noise can be drawn. The measurement campaigns, which aimed at establishing the noise emission…