Anders Goude
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View article: Evaluation of maximum power point tracking methods for a marine current energy converter
Evaluation of maximum power point tracking methods for a marine current energy converter Open
Marine current power is attracting more attention as a renewable energy option. Similar to wind power, marine current power often requires a maximum power point tracking (MPPT) method to optimize power extraction from the free‐flowing wate…
View article: Vortex filament method 3D analysis of design parameters for counter-rotating axis floating tilted turbine
Vortex filament method 3D analysis of design parameters for counter-rotating axis floating tilted turbine Open
The Counter-Rotating Axis Floating Tilted turbine (CRAFT) is a new design for floating off-shore wind power, which utilizes a low center of gravity and allows the tower to tilt to mitigate costs for platforming. In this study, 3D simulatio…
View article: Fast time-domain model for an array of interactive point-absorbers
Fast time-domain model for an array of interactive point-absorbers Open
A fast time-domain model is developed for an array of six interacting point-absorber wave energy converters, based on the design originated at Uppsala University. The point-absorbers are placed in a symmetric grid, were each row cont…
View article: Comparison of Three-Dimensional Numerical Methods for Modeling of Strut Effect on the Performance of a Vertical Axis Wind Turbine
Comparison of Three-Dimensional Numerical Methods for Modeling of Strut Effect on the Performance of a Vertical Axis Wind Turbine Open
This paper compares three different numerical models to evaluate their accuracy for predicting the performance of an H-rotor vertical-axis wind turbine (VAWT) considering the influence of struts. The strut of VAWTs is one factor that makes…
View article: A numerical study of strut and tower influence on the performance of vertical axis wind turbines using computational fluid dynamics simulation
A numerical study of strut and tower influence on the performance of vertical axis wind turbines using computational fluid dynamics simulation Open
This paper presents the influence of the strut and the tower on the aerodynamic force of the blade for the vertical axis wind turbine (VAWT). It has been known that struts degrade the performance of VAWTs due to the inherent drag losses. I…
View article: Aeroacoustic noise prediction of a vertical axis wind turbine using large eddy simulation
Aeroacoustic noise prediction of a vertical axis wind turbine using large eddy simulation Open
This study investigates the numerical prediction for the aerodynamic noise of the vertical axis wind turbine using large eddy simulation and the acoustic analogy. Low noise designs are required especially in residential areas, and sound le…
View article: Effect of pitch angle on power and hydrodynamics of a vertical axis turbine
Effect of pitch angle on power and hydrodynamics of a vertical axis turbine Open
The use of vertical-axis turbines in marine-current applications for electric energy generation is still in early developments, and one of the key factors for assessing the applicability of such technology is the power coefficient. To cont…
View article: Numerical prediction of noise generated from airfoil in stall using LES and acoustic analogy
Numerical prediction of noise generated from airfoil in stall using LES and acoustic analogy Open
This article presents the aerodynamic noise prediction of a NACA 0012 airfoil in stall region using Large Eddy Simulation and the acoustic analogy. While most numerical studies focus on noise for an airfoil at a low angle of attack, predic…
View article: Validation of Actuator Line and Vortex Models Using Normal Forces Measurements of a Straight-Bladed Vertical Axis Wind Turbine
Validation of Actuator Line and Vortex Models Using Normal Forces Measurements of a Straight-Bladed Vertical Axis Wind Turbine Open
Vertical Axis Wind Turbines (VAWTs) are characterized by complex and unsteady flow patterns resulting in considerable challenges for both numerical simulations and measurements describing the phenomena involved. In this study, a 3D Actuato…
View article: turbinesFoam/turbinesFoam: v0.1.1
turbinesFoam/turbinesFoam: v0.1.1 Open
Added support for OpenFOAM v7 and unofficial support for v1906.
View article: Technical Report -- Comparison of Direct Finite Element Simulation with Actuator Line Models and Vortex Models for Simulation of Turbulent Flow Past a Vertical Axis wind Turbine
Technical Report -- Comparison of Direct Finite Element Simulation with Actuator Line Models and Vortex Models for Simulation of Turbulent Flow Past a Vertical Axis wind Turbine Open
We compare three different methodologies for simulation of turbulent flow past a vertical axis wind turbine: (i) full resolution of the turbine blades in a Direct Finite Element Simulation (DFS), (ii) implicit representation of the turbine…
View article: Performance and wake comparison of horizontal and vertical axis wind turbines under varying surface roughness conditions
Performance and wake comparison of horizontal and vertical axis wind turbines under varying surface roughness conditions Open
A numerical study of both a horizontal axis wind turbine (HAWT) and a vertical axis wind turbine (VAWT) with similar size and power rating is presented. These large scale turbines have been tested when operating stand‐alone at their optima…
View article: turbinesFoam/turbinesFoam: v0.1.0
turbinesFoam/turbinesFoam: v0.1.0 Open
Fixed Glauert-type end effects models for clockwise turbine rotation. Added output for reference forces and coefficients, particularly useful for axial-flow turbines.
View article: Validation of a Coupled Electrical and Hydrodynamic Simulation Model for a Vertical Axis Marine Current Energy Converter
Validation of a Coupled Electrical and Hydrodynamic Simulation Model for a Vertical Axis Marine Current Energy Converter Open
This paper validates a simulation model that couples an electrical model in Simulink with a hydrodynamic vortex-model by comparing with experimental data. The simulated system is a vertical axis current turbine connected to a permanent mag…
View article: turbinesFoam/turbinesFoam: v0.0.8
turbinesFoam/turbinesFoam: v0.0.8 Open
Corrected Goude flow curvature correction. Added ability to calculate inflow velocity using a circle around each element. Turbines now write power and drag coefficient contributions from each blade.
View article: Force Measurements on a VAWT Blade in Parked Conditions
Force Measurements on a VAWT Blade in Parked Conditions Open
The forces on a turbine at extreme wind conditions when the turbine is parked is one of the most important design cases for the survivability of a turbine. In this work, the forces on a blade and its support arms have been measured on a 12…
View article: Critical Speed Control for a Fixed Blade Variable Speed Wind Turbine
Critical Speed Control for a Fixed Blade Variable Speed Wind Turbine Open
A critical speed controller for avoiding a certain rotational speed is presented. The controller is useful for variable speed wind turbines with a natural frequency in the operating range. The controller has been simulated, implemented and…
View article: Wake Flow Simulation of a Vertical Axis Wind Turbine Under the Influence of Wind Shear
Wake Flow Simulation of a Vertical Axis Wind Turbine Under the Influence of Wind Shear Open
The current trend of the wind energy industry aims for large scale turbines installed in wind farms. This brings a renewed interest in vertical axis wind turbines (VAWTs) since they have several advantages over the traditional Horizontal A…
View article: Modelling of rotating vertical axis turbines using a multiphase finite element method
Modelling of rotating vertical axis turbines using a multiphase finite element method Open
We combine the unified continuum fluid-structure interaction method with a mul-
\n
\ntiphase flow model to simulate turbulent flow and fluid-structure interaction of
\nrotating ver- tical axis turbines in offshore environments. This work …
View article: Mechanical Torque Ripple From a Passive Diode Rectifier in a 12 kW Vertical Axis Wind Turbine
Mechanical Torque Ripple From a Passive Diode Rectifier in a 12 kW Vertical Axis Wind Turbine Open
The influence of passive rectification on the mechanical torque of a permanent magnet generator for a directly driven vertical axis wind turbine has been studied. Passive diode rectification introduce electromagnetic torque ripple from the…
View article: Experimental demonstration of performance of a vertical axis marine current turbine in a river
Experimental demonstration of performance of a vertical axis marine current turbine in a river Open
An experimental station for marine current power has been installed in a river. The station comprises a vertical axis turbine with a direct-driven permanent magnet synchronous generator. In measurements of steady-state operation in varying…
View article: Frequency analysis of tangential force measurements on a vertical axis wind turbine
Frequency analysis of tangential force measurements on a vertical axis wind turbine Open
This paper presents experimental results of the torque ripple obtained from a three bladed 12 kW experimental H-rotor prototype. The measurements are performed by means of load cells installed on the base of the struts and by electrical me…
View article: Turbulence influence on optimum tip speed ratio for a 200 kW vertical axis wind turbine
Turbulence influence on optimum tip speed ratio for a 200 kW vertical axis wind turbine Open
The influence of turbulence intensity (TI) on the tip speed ratio for maximum power coefficient, here called λCp-max, is studied for a 200 kW VAWT H-rotor using logged data from a 14 month period with the H-rotor operating in wind speeds u…
View article: Validation of an Actuator Line Model Coupled to a Dynamic Stall Model for Pitching Motions Characteristic to Vertical Axis Turbines
Validation of an Actuator Line Model Coupled to a Dynamic Stall Model for Pitching Motions Characteristic to Vertical Axis Turbines Open
Vertical axis wind turbines (VAWT) can be used to extract renewable energy from wind flows. A simpler design, low cost of maintenance, and the ability to accept flow from all directions perpendicular to the rotor axis are some of the most …
View article: Actuator line modeling of vertical-axis turbines
Actuator line modeling of vertical-axis turbines Open
To bridge the gap between high and low fidelity numerical modeling tools for vertical-axis (or cross-flow) turbines (VATs or CFTs), an actuator line model (ALM) was developed and validated for both a high and a medium solidity vertical-axi…