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Goude, Anders
Publications (10 of 42) Show all publications
Goude, A. & Engblom, S. (2018). A general high order two-dimensional panel method. Applied Mathematical Modelling, 60, 1-17
Open this publication in new window or tab >>A general high order two-dimensional panel method
2018 (English)In: Applied Mathematical Modelling, ISSN 0307-904X, E-ISSN 1872-8480, Vol. 60, p. 1-17Article in journal (Refereed) Published
National Category
Computational Mathematics Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:uu:diva-343974 (URN)10.1016/j.apm.2018.02.010 (DOI)
Projects
UPMARCeSSENCE
Available from: 2018-02-21 Created: 2018-03-02 Last updated: 2018-03-14Bibliographically approved
Goude, A. (2018). A general high order two-dimensional panel method. Applied Mathematical Modelling, 60, 1-17
Open this publication in new window or tab >>A general high order two-dimensional panel method
2018 (English)In: Applied Mathematical Modelling, ISSN 0307-904X, E-ISSN 1872-8480, Vol. 60, p. 1-17Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Boundary element method, Vortex method, Airfoil design, Potential flow, Fast multipole method
National Category
Fluid Mechanics and Acoustics
Research subject
Scientific Computing
Identifiers
urn:nbn:se:uu:diva-345198 (URN)10.1016/j.apm.2018.02.010 (DOI)
Funder
StandUp for WindStandUp
Available from: 2018-03-08 Created: 2018-03-08 Last updated: 2018-03-08
Rossander, M., Goude, A. & Eriksson, S. (2017). Critical Speed Control for a Fixed Blade Variable Speed Wind Turbine. Energies, 10(11), Article ID 1699.
Open this publication in new window or tab >>Critical Speed Control for a Fixed Blade Variable Speed Wind Turbine
2017 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 10, no 11, article id 1699Article in journal (Refereed) Published
Abstract [en]

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 tested on an open site 12 kW vertical axis wind turbine prototype. The controller is based on an adaptation of the optimum torque control. Two lookup tables and a simple state machine provide the control logic of the controller. The controller requires low computational resources, and no wind speed measurement is needed. The results suggest that the controller is a feasible method for critical speed control. The skipping behavior can be adjusted using only two parameters. While tested on a vertical axis wind turbine, it may be used on any variable speed turbine with the control of generator power.

Keywords
vertical axis wind turbine, variable speed, control, optimal torque, critical speed, speed exclusion zone, natural frequencies, eigenfrequencies
National Category
Energy Systems
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
urn:nbn:se:uu:diva-331782 (URN)10.3390/en10111699 (DOI)000417046500018 ()
Funder
StandUpStandUp for Wind
Available from: 2017-10-18 Created: 2017-10-18 Last updated: 2018-03-09Bibliographically approved
Goude, A. & Rossander, M. (2017). Force measurements on a VAWT blade in parked conditions. Energies, 10(12), Article ID 1954.
Open this publication in new window or tab >>Force measurements on a VAWT blade in parked conditions
2017 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 10, no 12, article id 1954Article in journal (Refereed) Published
Abstract [en]

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 kW straight-bladed vertical axis wind turbine at an open site. Two cases are tested: one during electrical braking of the turbine, which allows it to rotate slowly, and one with the turbine mechanically fixed with the leading edge of the blade facing the main wind direction. The force variations with respect to wind direction are investigated, and it is seen that significant variations in forces depend on the wind direction. The measurements show that for the fixed case, when subjected to the same wind speed, the forces are lower when the blade faces the wind direction. The results also show that due to the lower forces at this particular wind direction, the average forces for the fixed blade are notably lower. Hence, it is possible to reduce the forces on a turbine blade, simply by taking the dominating wind direction into account when the turbine is parked. The measurements also show that a positive torque is generated from the blade for most wind directions, which causes the turbine to rotate in the electrically-braked case. These rotations will cause increased fatigue loads on the turbine blade.

National Category
Energy Systems
Identifiers
urn:nbn:se:uu:diva-331818 (URN)10.3390/en10121954 (DOI)000423156900025 ()
Funder
StandUp for WindStandUp
Available from: 2017-10-18 Created: 2017-10-18 Last updated: 2018-03-23Bibliographically approved
Rossander, M., Goude, A. & Eriksson, S. (2017). Mechanical torque ripple from a passive diode rectifier in a 12 kW vertical axis wind turbine. IEEE transactions on energy conversion, 32(1), 164-171
Open this publication in new window or tab >>Mechanical torque ripple from a passive diode rectifier in a 12 kW vertical axis wind turbine
2017 (English)In: IEEE transactions on energy conversion, ISSN 0885-8969, E-ISSN 1558-0059, Vol. 32, no 1, p. 164-171Article in journal (Refereed) Published
Abstract [en]

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 generator. The conversion of electromagnetic torque ripple into mechanical torque ripple and rotational speed ripple has been modeled, analytically evaluated, and simulated. The simulations have been compared to measurements on an open site 12 kW prototype. A parameter study with the model illustrates the impact of shaft torsional spring constant, generator rotor inertia, generator inductance, and dc-link capacitance. The results show that the shaft and generator rotor can be an effective filter of electromagnetic torque ripple from diode rectification. The measured mechanical torque ripple amplitude on the prototype is less than +/- 0.9% of nominal turbine torque. The measurements compare well with the simulations.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-272363 (URN)10.1109/TEC.2016.2626783 (DOI)000396130300016 ()
Available from: 2016-01-13 Created: 2016-01-13 Last updated: 2017-10-18Bibliographically approved
Nguyen, V. D., Jansson, J., Leoni, M., Janssen, B., Goude, A. & Hoffman, J. (2017). Modelling Of Rotating Vertical Axis Turbines Using A Multiphase Finite Element Method. In: Visonneau, Michael; Queutey, Patrick & Le Touzé, David (Ed.), VII International Conference on Computational Methods in Marine Engineering (MARINE 2017): . Paper presented at VII International Conference on Computational Methods in Marine Engineering (MARINE 2017), May 15-17, 2017, Nantes, France. (pp. 950-959). International Center for Numerical Methods in Engineering (CIMNE)
Open this publication in new window or tab >>Modelling Of Rotating Vertical Axis Turbines Using A Multiphase Finite Element Method
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2017 (English)In: VII International Conference on Computational Methods in Marine Engineering (MARINE 2017) / [ed] Visonneau, Michael; Queutey, Patrick & Le Touzé, David, International Center for Numerical Methods in Engineering (CIMNE) , 2017, p. 950-959Conference paper, Published paper (Refereed)
Abstract [en]

We combine the unified continuum fluid-structure interaction method with a multiphase flow model to simulate turbulent flow and fluid-structure interaction of rotating vertical axis turbines in offshore environments. This work is part of a project funded by the Swedish Energy Agency, which focuses on energy systems combining ecological sustainability, competitiveness and reliability of supply. The numerical methods used comprise the Galerkin least-squares finite element method, coupled with the arbitrary Lagrangian-Eulerian method, in order to compute weak solutions of the Navier-Stokes equations for high Reynolds numbers on moving meshes. Mesh smoothing methods help to improve the mesh quality when the mesh undergoes large deformations. The simulations have been performed using the Unicorn solver in the FEniCS-HPC framework, which runs on supercomputers with near optimal weak and strong scaling up to thousands of cores.

Place, publisher, year, edition, pages
International Center for Numerical Methods in Engineering (CIMNE), 2017
Keywords
Vertical axis turbines, fluid-structure interaction, fluid-rigid body interaction, Unicorn solver, FEniCS-HPC, Navier-Stokes equations, multiphase finite element method
National Category
Computational Mathematics Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:uu:diva-352937 (URN)000426877000078 ()978-84-946909-8-3 (ISBN)
Conference
VII International Conference on Computational Methods in Marine Engineering (MARINE 2017), May 15-17, 2017, Nantes, France.
Funder
EU, European Research CouncilSwedish Energy Agency
Note

See: Conference E-Book

Available from: 2018-06-12 Created: 2018-06-12 Last updated: 2018-06-12Bibliographically approved
Mendoza, V. & Goude, A. (2017). Wake Flow Simulation of a Vertical Axis Wind Turbine Under the Influence of Wind Shear. In: Journal of Physics: Conference Series, Volume 854, conference 1: . Paper presented at Wake Conference 2017, Visby, May 30-June 1, 2017..
Open this publication in new window or tab >>Wake Flow Simulation of a Vertical Axis Wind Turbine Under the Influence of Wind Shear
2017 (English)In: Journal of Physics: Conference Series, Volume 854, conference 1, 2017Conference paper, Published paper (Refereed)
Abstract [en]

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 Axis Wind Tubines (HAWTs) for mitigating the new challenges. However, operating VAWTs are characterized by complex aerodynamics phenomena, presenting considerable challenges for modeling tools. An accurate and reliable simulation tool for predicting the interaction between the obtained wake of an operating VAWT and the flow in atmospheric open sites is fundamental for optimizing the design and location of wind energy facility projects. The present work studies the wake produced by a VAWT and how it is affected by the surface roughness of the terrain, without considering the effects of the ambient turbulence intensity. This study was carried out using an actuator line model (ALM), and it was implemented using the open-source CFD library OpenFOAM to solve the governing equations and to compute the resulting flow fields. An operational H-shaped VAWT model was tested, for which experimental activity has been performed at an open site north of Uppsala-Sweden. Different terrains with similar inflow velocities have been evaluated. Simulated velocity and vorticity of representative sections have been analyzed. Numerical results were validated using normal forces measurements, showing reasonable agreement.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-348342 (URN)10.1088/1742-6596/854/1/012031 (DOI)
Conference
Wake Conference 2017, Visby, May 30-June 1, 2017.
Funder
StandUp for Wind
Available from: 2018-04-11 Created: 2018-04-11 Last updated: 2018-04-17Bibliographically approved
Lundin, S., Forslund, J., Goude, A., Grabbe, M., Yuen, K. & Leijon, M. (2016). Experimental demonstration of performance of a vertical axis marine current turbine in a river. Journal of Renewable and Sustainable Energy, 8(6), Article ID 064501.
Open this publication in new window or tab >>Experimental demonstration of performance of a vertical axis marine current turbine in a river
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2016 (English)In: Journal of Renewable and Sustainable Energy, ISSN 1941-7012, E-ISSN 1941-7012, Vol. 8, no 6, article id 064501Article in journal (Refereed) Published
Abstract [en]

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 flow conditions, performance comparable to that of turbines designed for significantly higher flow speeds is achieved, demonstrating the viability of electricity generation in low speed (below 1.5 m/s) marine currents.

Keywords
Ocean currents, electric currents, rivers, hydrodynamics, torque
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Ocean and River Engineering
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
urn:nbn:se:uu:diva-280762 (URN)10.1063/1.4971817 (DOI)000390115300019 ()
Projects
Marin strömkraft
Funder
Vattenfall ABÅForsk (Ångpanneföreningen's Foundation for Research and Development)StandUp
Note

Övriga finansiärer: J. Gust. Richert Memorial Fund och Bixia Environmental Fund.

Available from: 2016-03-15 Created: 2016-03-15 Last updated: 2017-11-30Bibliographically approved
Lundin, S., Goude, A. & Leijon, M. (2016). One-Dimensional Modelling of Marine Current Turbine Runaway Behaviour. Energies, 9(5), Article ID 309.
Open this publication in new window or tab >>One-Dimensional Modelling of Marine Current Turbine Runaway Behaviour
2016 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 9, no 5, article id 309Article in journal (Refereed) Published
Abstract [en]

If a turbine loses its electrical load, it will rotate freely and increase speed, eventually achieving that rotational speed which produces zero net torque. This is known as a runaway situation. Unlike many other types of turbine, a marine current turbine will typically overshoot the final runaway speed before slowing down and settling at the runaway speed. Since the hydrodynamic forces acting on the turbine are dependent on rotational speed and acceleration, turbine behaviour during runaway becomes important for load analyses during turbine design. In this article, we consider analytical and numerical models of marine current turbine runaway behaviour in one dimension. The analytical model is found not to capture the overshoot phenomenon, while still providing useful estimates of acceleration at the onset of runaway. The numerical model incorporates turbine wake build-up and predicts a rotational speed overshoot. The predictions of the models are compared against measurements of runaway of a marine current turbine. The models are also used to recreate previously-published results for a tidal turbine and applied to a wind turbine. It is found that both models provide reasonable estimates of maximum accelerations. The numerical model is found to capture the speed overshoot well.

Keywords
marine current turbines; tidal turbines; runaway speed
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-280761 (URN)10.3390/en9050309 (DOI)000377263400001 ()
Funder
Vattenfall ABSwedish Research CouncilÅForsk (Ångpanneföreningen's Foundation for Research and Development)StandUpSwedish Energy Agency
Available from: 2016-03-15 Created: 2016-03-15 Last updated: 2017-11-30Bibliographically approved
Möllerström, E., Ottermo, F., Goude, A., Eriksson, S. S., Hylander, J. & Bernhoff, H. (2016). Turbulence influence on wind energy extraction for a medium size vertical axis wind turbine. Wind Energy, 19(11), 1963-1973
Open this publication in new window or tab >>Turbulence influence on wind energy extraction for a medium size vertical axis wind turbine
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2016 (English)In: Wind Energy, ISSN 1095-4244, E-ISSN 1099-1824, Vol. 19, no 11, p. 1963-1973Article in journal (Refereed) Published
Abstract [en]

The relation between power performance and turbulence intensity for a VAWT H-rotor is studied using logged data from a 14 month (discontinuous) period with the H-rotor operating in wind speeds up to 9 m/s. The turbine, designed originally fora nominal power of 200 kW, operated during this period mostly in a restricted mode due to mechanical concerns, reachingpower levels up to about 80 kW. Two different approaches are used for presenting results, one that can be compared topower curves consistent with the International Electrotechnical Commission (IEC) standard and one that allows isolatingthe effect of turbulence from the cubic variation of power with wind speed. Accounting for this effect, the turbine stillshows slightly higher efficiency at higher turbulence, proposing that the H-rotor is well suited for wind sites with turbulentwinds. The operational data are also used to create a Cp(λ) curve, showing slightly lower Cp compared with a curvesimulated by a double multiple streamtube model.

Keywords
VAWT; H-rotor; turbulence intensity; power coefficient curve
National Category
Energy Engineering
Identifiers
urn:nbn:se:uu:diva-277352 (URN)10.1002/we.1962 (DOI)000386149700001 ()
Funder
StandUpStandUp for Wind
Available from: 2016-02-19 Created: 2016-02-19 Last updated: 2017-11-28
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