A5020180048- Wind Energy Research and Development
- Fluid Dynamics and Vibration Analysis
- Wave and Wind Energy Systems
- Wind and Air Flow Studies
- Structural Health Monitoring Techniques
- Offshore Engineering and Technologies
- Vibration and Dynamic Analysis
- Marine and Offshore Engineering Studies
- Probabilistic and Robust Engineering Design
- Real-time simulation and control systems
- Aerospace Engineering and Energy Systems
- Wind Turbine Control Systems
- Computational Fluid Dynamics and Aerodynamics
- Aerodynamics and Fluid Dynamics Research
- Advanced Numerical Methods in Computational Mathematics
- Meteorological Phenomena and Simulations
- Coastal and Marine Dynamics
- Ship Hydrodynamics and Maneuverability
- Turbomachinery Performance and Optimization
- Tropical and Extratropical Cyclones Research
- Geotechnical Engineering and Soil Mechanics
- Electric Motor Design and Analysis
- Ocean Waves and Remote Sensing
- Tribology and Lubrication Engineering
- Reservoir Engineering and Simulation Methods
National Renewable Energy Laboratory
2016-2025
Massachusetts Institute of Technology
2015
IIT@MIT
2015
Office of Scientific and Technical Information
2005-2014
National Technical Information Service
2010-2014
University of Massachusetts Amherst
2014
University of Stuttgart
2014
WavEC Offshore Renewables
2013
American Society of Mechanical Engineers
2013
Leibniz University Hannover
2012
Abstract The vast deepwater wind resource represents a potential to use offshore floating turbines power much of the world with renewable energy. Many turbine concepts have been proposed, but dynamics models, which account for inflow, aerodynamics, elasticity and controls turbine, along incident waves, sea current, hydrodynamics, platform mooring floater, were needed determine their technical economic feasibility. This work presents development comprehensive simulation tool modelling coupled...
There are global efforts in the offshore wind community to develop reliable floating turbine technologies that capable of exploiting abundant deepwater resource. These require validated numerical simulation tools predict coupled aero-hydro-servo-elastic behavior such systems. To date, little has been done public domain validate tools. This work begins address this problem by presenting validation a model constructed National Renewable Energy Laboratory (NREL) simulator FAST with 1/50th-scale...
Abstract This work presents a comprehensive dynamic–response analysis of three offshore floating wind turbine concepts. Models were composed one 5 MW supported on land and turbines located tension leg platform, spar buoy barge. A loads stability adhering to the procedures international design standards was performed for each model using fully coupled time domain aero‐hydro‐servo‐elastic simulation tool FAST with AeroDyn HydroDyn. The concepts are compared based calculated ultimate loads,...
This paper summarizes the findings from Phase II of Offshore Code Comparison, Collaboration, Continued, with Correlation project. The project is run under International Energy Agency Wind Research Task 30, and focused on validating tools used for modeling offshore wind systems through comparison simulated responses select system designs to physical test data. Validation activities such as these lead improvement tools, which will enable development more innovative cost-effective designs. For...
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 A coupled medium‐fidelity drivetrain model is developed and implemented in OpenFAST for a 10‐MW land‐based reference turbine. The implementation verified against fully multibody wind turbine model, including detailed drivetrain. new can simultaneously accurately estimate main bearing loads represent elastic bending of the It has low computational cost useful early design phases, sensitivity analyses complex systems like farms (where expense must be expended elsewhere). Here,...
This paper presents the influence of conventional wind turbine blade-pitch control actions on pitch damping a supported by an offshore floating barge with catenary moorings.
This article presents a collaborative research program that the Massachusetts Institute of Technology (MIT) and National Renewable Energy Laboratory (NREL) have undertaken to develop innovative cost-effective floating mooring systems for offshore wind turbines in water depths 10-200 m.Methods coupled structural, hydrodynamic, aerodynamic analysis turbine are presented frequency domain.This was conducted by coupling aerodynamics structural dynamics code FAST [4] developed at NREL with wave...
NREL has recently put considerable effort into improving the overall modularity of its FAST wind turbine aero-hydro-servo-elastic tool to (1) improve ability read, implement, and maintain source code; (2) increase module sharing shared code development across community; (3) numerical performance robustness; (4) greatly enhance flexibility expandability enable further developments functionality without need recode established modules. The new modularization framework supports...
Offshore wind turbines are designed and analyzed using comprehensive simulation tools (or codes) that account for the coupled dynamics of inflow, aerodynamics, elasticity, controls turbine, along with incident waves, sea current, hydrodynamics, mooring dynamics, foundation support structure. This paper describes latest findings code-to-code verification activities Code Comparison Collaboration Continuation project, which operates under International Energy Agency Wind Task 30. In phase...
Offshore winds are generally stronger and more consistent than on land, making the offshore environment attractive for wind energy development. A large part of resource is however located in deep water, where floating turbines only economical way harvesting energy. The design relies use modeling tools that can simulate entire coupled system behaviour. At present, most these include first-order hydrodynamic theory. However, observations supposed second-order responses wave-tank tests...
Abstract Previous research has revealed the need for a validation study that considers several wake quantities and code types so decisions on trade‐off between accuracy computational cost can be well informed appropriate to intended application. In addition guiding choice setup, rigorous model exercises are needed identify weaknesses strengths of specific models guide future improvements. Here, we consider 13 approaches simulating wakes observed with nacelle‐mounted lidar at Scaled Wind...
Abstract This paper presents a numerical implementation of the geometrically exact beam theory based on Legendre‐spectral‐finite‐element (LSFE) method. The displacement‐based is presented, and special treatment three‐dimensional rotation parameters reviewed. An LSFE high‐order finite element with nodes located at Gauss–Legendre–Lobatto points. These elements can be an order magnitude more computationally efficient than low‐order for given accuracy level. new module, BeamDyn, implemented in...
Abstract Phase I of the OC6 project is focused on examining why offshore wind design tools underpredict response (loads/motion) OC5-DeepCwind semisubmersible at its surge and pitch natural frequencies. Previous investigations showed that underprediction was primarily related to nonlinear hydrodynamic loading, so two new validation campaigns were performed separately examine different load components. In this paper, we validate a variety against test data, focusing ability accurately model...
Abstract. In this work, we implement, verify, and validate a physics-based digital twin solution applied to floating offshore wind turbine. The is validated using measurement data from the full-scale TetraSpar prototype. We focus on estimation of aerodynamic loads, speed, section loads along tower, with aim estimating fatigue lifetime tower. Our integrates (1) Kalman filter estimate structural states based linear model structure measurements turbine, (2) an estimator, (3) virtual sensing...