A5008836705- Wind and Air Flow Studies
- Fluid Dynamics and Vibration Analysis
- Wind Energy Research and Development
- Aerodynamics and Fluid Dynamics Research
- Turbomachinery Performance and Optimization
- Fluid Dynamics and Turbulent Flows
- Computational Fluid Dynamics and Aerodynamics
- Vibration and Dynamic Analysis
- Hydraulic flow and structures
- Hydraulic and Pneumatic Systems
- Structural Engineering and Vibration Analysis
- Aerodynamics and Acoustics in Jet Flows
- Aerospace Engineering and Control Systems
- Meteorological Phenomena and Simulations
- Tribology and Lubrication Engineering
- Structural Health Monitoring Techniques
- Fluid dynamics and aerodynamics studies
Technical University of Denmark
2019-2024
Laboratoire de Dynamique des Fluides
2020
Abstract. Within the framework of fourth phase International Energy Agency (IEA) Wind Task 29, a large comparison exercise between measurements and aeroelastic simulations has been carried out featuring three simulation cases in axial, sheared yawed inflow conditions. Results were obtained from more than 19 tools originating 12 institutes, ranging fidelity blade element momentum (BEM) to computational fluid dynamics (CFDs) compared state-of-the-art field 2 MW DanAero turbine. More 15...
Vortex-induced vibrations (VIVs) of wind turbine blades are a phenomenon that cannot be predicted sufficiently accurate by low fidelity methods. High methods, such as computational fluid dynamics (CFD) coupled to structural solver come at high cost. Most studies the have so far focused on analysis single blades. For these cases, so-called forced-motion method prescribing blade motion according modeshapes has proven effective. In this article, VIVs IEA 10 MW reference is studied in...
The actuator line method is a widely used technique to model wind turbines in computational fluid dynamics, as it significantly reduces the required expense comparison simulations using geometrically resolved blades. Actuator coupled an aeroelastic solver enables not only study of detailed wake dynamics but also loads, flexible blade deformation and how this interacts with flow. Validating predictions loading, deflection turbine wakes complex inflow scenarios particularly relevant for modern...
Abstract Aeroelastic simulations of a 2.3 MW wind turbine rotor operating in different complex atmospheric flows are conducted using high fidelity fluid–structure interaction (FSI) simulations. Simpler blade element momentum (BEM) theory based likewise for comparison, and measurements from field experiments used validation the Good agreement is seen between simulated measured forces. It found that flows, BEM‐based predict similar forces as computational fluid dynamics (CFD)‐based FSI,...
Abstract A parked wind turbine can be subjected to large yaw angles, which causes vortex shedding. Under some particular inflow conditions, the interaction between shed vorticity and blade structure could lead Vortex-Induced Vibrations (VIV). VIV are an instability where response grows until it reaches a limit cycle oscillation. In this paper, we will focus on last part of response. We see that shedding makes aeroelastic system linear time-periodic, study its stability with Floquet theory....
Abstract. In order to design future large wind turbines, knowledge is needed about the impact of aero-elasticity on rotor loads and performance physics atmospheric flow surrounding turbines. The objective present work study both effects by means high-fidelity rotor-resolved numerical simulations. particular, unsteady computational fluid dynamics (CFD) simulations a 2.3 MW turbine are conducted, this being largest with relevant experimental data available authors. Turbulence modeled two...
Abstract. Vortex-induced vibrations on wind turbine blades are a complex phenomenon not predictable by standard engineering models. For this reason, higher-fidelity computational fluid dynamics (CFD) methods needed. However, the term CFD covers broad range of fidelities, and study investigates which choices have to be made when wanting capture vortex-induced vibration (VIV) satisfying degree. The method studied is so-called forced-motion (FM) approach, where structural motion imposed blade...
Abstract. Aerodynamic loads need to be known for planning and defining test beforehand wind turbine blades that are tested fatigue certifications. It is the aerodynamic forces, especially drag, different tests operation, due entirely flow conditions. In facilities, a vibrating blade will move in out of its own wake, increasing drag forces on blade. This not case operation. To study this special condition present during experimental tests, numerical simulations pull–release were conducted....
Abstract In this study, simulation results of two different computational fluid dynamics codes, Nalu-Wind and EllipSys3D, are presented for a wind turbine rotor in complex yawed sheared inflow. The compared to measurements from the DanAero experiments, validate computed pressures azimuthal trends. Despite code methodologies grid setups, codes agree well integrated forces along blade all positions, however with some discrepancy very case. Additionally, both capture trends force levels seen...
Abstract Within an international collaboration framework, the accuracy of rotor aerodynamic models used for design load calculations wind turbines is being assessed. Where use high-fidelity computation fluid dynamics (CFD) and mid-fidelity free-vortex wake (FVW) has become commonplace within energy community, these still fail to meet requirements in terms execution time computational cost needed calculations. The fast but engineering fidelity blade-element/momentum (BEM) method can therefore...
Abstract. In this study, vortex-induced vibrations (VIVs) on the IEA 10 MW blade are investigated using two methodologies in order to assess strengths and weaknesses of simulation types. Both fully coupled fluid–structure interaction (FSI) simulations computational fluid dynamics (CFD) with forced motion used compared. It is found that for studied cases high inclination angles, forced-motion succeed capturing power injection by aerodynamics, despite being simplified. From simulations, a...
Abstract. Vortex-induced vibrations on wind turbine blades are a complex phenomenon not predictable by standard engineering models. For this reason, higher fidelity computational fluid dynamics (CFD) methods needed. However, the term CFD covers broad range of fidelities, and study investigates which choices have to be made when wanting capture VIV in satisfying degree. The method studied is so-called forced motion (FM) approach, where structural imposed blade surface through modeshape...
Abstract The vortex-induced forces on an extruded cylinder with a span of two diameters representative finite segment non-tapered wind turbine tower at very high Reynolds number (Re = 8.0×10 6 ) are numerically investigated using incompressible Navier-Stokes flow solver Improved Delayed Detached Eddy Simulation (IDDES) turbulence model and correlation-based boundary layer transition modelling. solution shows spanwise correlated structured vortex shedding the Strouhal St 0.48. is found to...
Vortex-induced vibrations (VIVs) of wind turbine blades can't be predicted accurately by low fidelity methods, and high methods come at computational cost. Previous studies the phenomenon have focused on single blades. For these cases, so-called forced-motion method prescribing blade motion according to structural modeshapes has proven effective. In this article, VIVs IEA 10 MW reference are studied in a fluid-structure interaction setup, where is represented solver rotor simulated CFD...
Abstract. Within the framework of fourth phase International Energy Agency IEA Wind Task 29, a large comparison exercise between measurements and aero-elastic simulations has been carried out featuring three simulation cases in axial, sheared yawed inflow conditions. Results were obtained from more than 19 tools originating 12 institutes ranging fidelity Blade Element Momentum (BEM) to Computational Fluid Dynamics CFD compared state art field 2MW DanAero turbine. More 15 different variable...
Nonlinear behavior in fluid-structure interaction (FSI) of bridge decks becomes increasingly significant for modern bridges with increasing spans, larger flexibility and new aerodynamic deck configurations. Better understanding the nonlinear aeroelasticity further development reduced-order models aeroelastic forces become necessary. In this paper, amplitude-dependent neutral angle dependent nonlinearities motion-induced loads are highlighted by series computational fluid dynamics (CFD)...
Abstract. In order to design future large wind turbines, knowledge is needed about the impact of aero-elasticity on rotor loads and performance, physics atmospheric flow surrounding turbines. The objective present work study both effects by means high fidelity rotor-resolved numerical simulations. particular, unsteady computational fluid dynamics (CFD) simulations a 2.3 MW turbine are conducted, this being largest with relevant experimental data available authors. Turbulence modeled two...