A5076565935- Wind Energy Research and Development
- Fluid Dynamics and Vibration Analysis
- Wave and Wind Energy Systems
- Wind and Air Flow Studies
- Vibration and Dynamic Analysis
- Ocean Waves and Remote Sensing
- Structural Analysis and Optimization
- Aerospace Engineering and Energy Systems
- Ship Hydrodynamics and Maneuverability
Universität Hamburg
2018-2024
Hamburg University of Technology
2018-2024
Abstract. This paper provides a summary of the work done within Phase III Offshore Code Comparison Collaboration, Continued, with Correlation and unCertainty (OC6) project, under International Energy Agency Wind Technology Collaboration Programme Task 30. phase focused on validating aerodynamic loading wind turbine rotor undergoing large motion caused by floating support structure. Numerical models Technical University Denmark 10 MW reference were validated using measurement data from 1:75...
Abstract. An accurate prediction of the unsteady loads acting on floating offshore wind turbines (FOWTs) under consideration wave excitation is crucial for a resource-efficient turbine design. Despite considerable number simulation studies in this area, it still not fully understood which aerodynamic phenomena have notable influence rotor motion. In present study, investigations are carried out to evaluate most relevant surge As result, inflow conditions determined significant these can be...
The further development of the first-order panel method panMARE for simulating floating offshore wind turbines (FOWTs) in time domain is presented this work. Based on a surface discretisation platform, tower and rotor with its wake, three-dimensional aerodynamic hydrodynamic flow fields are calculated. A free wake deformation model integrated to capture blade–wake interaction. Hydrodynamic, mooring loads cumulated by six-degrees-of-freedom solver compute motion FOWT. able simulate unsteady...
Abstract. This study reports the results of second round analyses Offshore Code Comparison, Collaboration, Continued, with Correlation and unCertainty (OC6) project Phase III. While first investigated rotor aerodynamic loading, here, focus is given to wake behavior a floating wind turbine under large motion. Wind tunnel experimental data from UNsteady Aerodynamics for FLOating (UNAFLOW) are compared simulations provided by participants methods codes different levels fidelity. The effect...
Abstract. This study reports the results of second round analyses OC6 project Phase III. While first investigated rotor aerodynamic loading, here focus is given to wake behavior a floating wind turbine under large motion. Wind tunnel experimental data from UNsteady Aerodynamics for FLOating (UNAFLOW) are compared with simulations provided by participants methods and codes different levels fidelity. The effect platform motion both on near far investigated. More specifically, tip vortices in...
Abstract The yaw moment of wind turbine rotors has never been in the focus aerodynamics. With increasing activities development support structures for Floating Offshore Wind Turbines (FOWT), which passively align with wind, interest shifted, as an accurate determination is a crucial issue successful design such power plants. A downwind coned rotor promising option to increase and therefore self‐alignment capability yawing FOWT. Unfortunately, experimental numerical studies on estimation are...
Abstract The present paper gives insights into the verification of different models Floatgen demonstrator by BW Ideol. This floating offshore wind turbine (FOWT) is based on a barge type-floater with moonpool. moonpool shall dampen platform’s motion and challenging to model due increased complexity hydrodynamic behaviour. For purposes, results two engineering methods (OrcaFlex, OpenFAST) equipped frequency-dependent solver nonlinear time-domain boundary element method panMARE are compared....
Floating offshore wind turbines are a promising concept for expanding energy. In comparison with fix-founded turbines, the overall costs less dependent on water depths, which leads to variety of potential locations and markets worldwide. Furthermore, floating platforms allow new structural designs save material installation costs. this paper, self-aligning platform equipped 6 MW turbine is presented. The moored single point uses turret buoy be able rotate freely around its anchor point. A...
Abstract The role of unsteadiness in the aerodynamics Floating Offshore Wind Turbines (FOWT) remains a subject discussion among research community. Therefore, it must be investigated whether and to what extent transient aerodynamic phenomena impact loads wind turbine rotor undergoing motions unsteady winds. study is closely linked question modern Blade Element Momentum Theory (BEMT) methods can considered reliable for simulation FOWTs. In this work, investigations are carried out identify...
Abstract. An accurate prediction of the unsteady loads acting on floating offshore wind turbines (FOWT) under consideration wave excitation is crucial for a resource-efficient turbine design. Despite considerable number simulation studies in this area, it still not fully understood, which aerodynamic phenomena have notable influence rotor motion. In present study, investigations are carried out to evaluate most relevant surge As result, inflow conditions determined significant these can be...
Abstract The development of floating offshore wind turbines opens the way for various new design types, and platform, tower turbine can benefit from its foundation. Self-aligning platforms, where entire structure follows direction are a promising concept. A single point mooring with turret system allows free rotation around vertical axis. Aerodynamic forces rotor induce self-aligning moment. In present study, operating principle passive platform airfoil-shaped downwind is analyzed under...
Abstract. The accurate simulation of loads and motions Floating Offshore Wind Turbines (FOWT) in operation is key to the commercialisation this technology. To improve such load predictions, a critical assessment capabilities limitations methods for FOWT mandatory. However, uncertainties arise during whole validation process numerical method. These can drastically impair quality validation. In case FOWT, interaction between aerodynamic, hydrodynamic mooring on one hand platform other causes...
Abstract Recent advances in lidar technology have expanded the possibilities for measuring full-scale wind turbine wakes within atmospheric boundary layer. This study utilizes a four-beam pulsed installed on nacelle of floating to measure near-wake. The wake measurement campaign was conducted Floatgen, with measurements reaching up 2.5 times rotor diameter distance. These are presented as 10-minute average radial speeds. focus this is below rated speed 7 m/s. Free flow conditions were...
Abstract. Accurate simulation of the loads and motions floating offshore wind turbines (FOWTs) in operation is key to commercialisation this technology. To improve such load predictions, a critical assessment capabilities limitations methods for FOWTs mandatory. However, uncertainties arise during whole validation process numerical method. These can drastically impair quality validation. In case FOWTs, interaction between aerodynamic, hydrodynamic mooring on one hand platform other causes...
Abstract The growing number of Floating Offshore Wind Turbine (FOWT) concepts that utilize a single point mooring and therefore rely on the self-alignment capabilities wind turbine (e.g. SCD nezzy or SelfAligner by CRUSE Offshore) demands an extension simulation methods used for their development. A crucial issue these is accurate prediction forces moments, which contribute to self-alignment. In contrast well-studied behaviour torque thrust, yaw moment lateral rotor under yawed conditions...