A5081759050- Wind and Air Flow Studies
- Wind Energy Research and Development
- Meteorological Phenomena and Simulations
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics and Turbulent Flows
- Energy Load and Power Forecasting
- Structural Response to Dynamic Loads
- Tropical and Extratropical Cyclones Research
- Ocean Waves and Remote Sensing
- Mechanical Behavior of Composites
- Cellular and Composite Structures
- Probabilistic and Robust Engineering Design
- Climate variability and models
- Aerodynamics and Fluid Dynamics Research
- Aeolian processes and effects
- Oceanographic and Atmospheric Processes
- Structural Health Monitoring Techniques
- Plant Water Relations and Carbon Dynamics
- Coastal and Marine Dynamics
- Geophysics and Gravity Measurements
- Acoustic Wave Phenomena Research
- Icing and De-icing Technologies
- Aerodynamics and Acoustics in Jet Flows
- Atmospheric and Environmental Gas Dynamics
- Social Acceptance of Renewable Energy
Technical University of Denmark
2016-2025
Azotic Technologies (United Kingdom)
2022
Danish Energy Association
2020-2022
Renal Research Institute
2019
University of Massachusetts Amherst
2018
Augusta University
2018
Queen's University Belfast
2018
Imperial College London
2014-2017
Ulverscroft (United Kingdom)
2017
Belfast Health and Social Care Trust
2017
Abstract The Global Wind Atlas (GWA) provides high-resolution databases and maps of the wind resource for all land points water within 200 km coastline, excluding Antarctica. GWA is used to identify understand global, national, regional, local potential energy guide specialists, policymakers, planners in transition a sustainable system. This information vital ensuring growth energy, helping system, which will mitigate climate change meet world’s need reliable, affordable, clean energy. uses...
Wind power forecasting has supported operational decision-making for system and electricity markets 30 years. Efforts of improving the accuracy and/or certainty deterministic or probabilistic wind forecasts are continuously exerted by academics industries. Forecast errors associated uncertainties propagating through whole chain, from weather provider to end user, cannot be eliminated completely. Therefore, understanding uncertainty sources how these propagate throughout modelling chain is...
Abstract An improved k ‐ ϵ turbulence model is developed and applied to a single wind turbine wake in neutral atmospheric boundary layer using Reynolds averaged Navier–Stokes solver. The proposed includes flow‐dependent C μ that sensitive high velocity gradients, e.g., at the edge of wake. modified compared with original eddy viscosity model, Large‐Eddy Simulations field measurements eight test cases. comparison shows deficits, predicted by are much closer ones calculated Simulation those...
Abstract. We define and demonstrate a procedure for quick assessment of site-specific lifetime fatigue loads using simplified load mapping functions (surrogate models), trained by means database with high-fidelity simulations. The performance five surrogate models is assessed comparing predictions at 10 sites an aeroelastic model the DTU MW reference wind turbine. methods are polynomial chaos expansion, quadratic response surface, universal Kriging, importance sampling, nearest-neighbor...
Abstract We analyse high‐frequency wind velocity measurements from two test stations over a period of several years and at heights ranging 60 to 200 m, with the objective validate shear predictions as used in load simulations for turbine design. A validated model is thereby proposed flat terrain that can significantly decrease uncertainty associated fatigue turbines large rotors. An essential contribution conditioning on 90% quantile turbulence, such appropriate magnitude design achieved....
Abstract. Numerical simulations of the Vestas multi-rotor demonstrator (4R-V29) are compared with field measurements power performance and remote sensing wake deficit from a short-range WindScanner lidar system. The predict gain 0 %–2 % in due to rotor interaction at below rated wind speeds. curve also show that increases speed by 1.8 %, which can result 1.5 increase annual energy production. numerical four distinct deficits near wake, merge into single-wake structure further downstream....
Abstract This article presents a joint statistical model, which is needed in probabilistic design and structural risk assessment, that has been fitted to data of wind wave conditions for an offshore location off South Brittany. The are from numerical model contain hourly values several variables over period 32 years. distribution presented this considers the direction, mean speed, significant height, peak period. A conditional turbulence given speed introduced yield additional variable...
Increasingly large turbines have led to a transition from surface-based `bottom–up’ wind flow modeling and meteorological understanding, more complex of resources, energy yields, site assessment. More expensive turbines, larger windfarms, maturing commercialization meant that uncertainty quantification (UQ) such has become crucial for the industry. In this paper, we outline roots why it was initially possible, advancing models needed today, tradeoffs implications using models. Statistical...
The recently developed k-ε-fP eddy-viscosity model is applied to one on-shore and two off-shore wind farms.The results are compared with power measurements of the standard k-ε model.In addition, direction uncertainty used correct a Gaussian filter.The underpredicts deficit first downstream turbines, whereas eddyviscosity shows good agreement measurements.However, difference in predicted by turbulence models becomes smaller for turbines that located further downstream.Moreover, between...
The newly developed k-ε-fP eddy viscosity model is applied to double wind turbine wake configurations in a neutral atmospheric boundary layer, using Reynolds averaged Navier-Stokes solver.The turbines are represented by actuator disks.A proposed variable disk force method employed estimate the power production of interacting and results compared with two existing methods; based on tabulated airfoil data axial induction from 1D momentem theory.The calculates correct power, while other methods...
Abstract A coupledwind‐wave modeling system is used to simulate 23 years of storms and estimate offshore extreme wind statistics. In this system, the atmospheric Weather Research Forecasting (WRF) model Spectral Wave for Near shore (SWAN) are coupled, through a wave boundary layer (WBLM) that implemented in SWAN. The WBLM calculates momentum turbulence kinetic energy budgets, using them transfer wave‐induced stress modeling. While such coupling has trivial impact on 10‐m speeds less than 20...
Summary The Global Atlas for Siting Parameters project compiles a suite of models into complex modeling system, uses up‐to‐date global datasets, and creates atlases siting parameters at spatial resolution 275 m. These include the 50‐year wind, turbulence, turbine class recommendations based on relevant generic turbines. includes microscale Linear Computational Model (LINCOM), statistical, spectral correction method here revised strong convective areas tropical cyclone affected areas, two...
Beyond the existing, limited IEC prescription to describe fatigue loads on wind turbines, we look towards probabilistic characterization of via analogous atmospheric flow, particularly for today's "taller" turbines with rotors well above surface layer. Based both data from multiple sites as theoretical bases boundary-layer meteorology and turbulence, offer descriptions shear turbulence intensity, elucidating connection each other stability terrain. These are used input calculation, a...
Abstract A new k ‐ ϵ model is introduced that consistent with Monin–Obukhov similarity theory (MOST). The proposed compared another was developed in an attempt to maintain inlet profiles compatible MOST. It shown the previous not MOST for unstable conditions, while can over distances of 50km. Copyright © 2016 John Wiley & Sons, Ltd.
The tailorable mechanical properties and high strength-to-weight ratios of composite sandwich panels make them interest to the commercial marine naval sector, however, further investigation into their blast resilience is required. experiments performed in this study aimed identify whether alterations skins or core a panel can yield improved both air underwater. Underwater loads using 1.28 kg TNT equivalent charge at stand-off distance 1 m were on four different panels. Results revealed that...
Abstract. The design of wind turbines and farms can be improved by increasing the accuracy inflow models representing atmospheric boundary layer. In this work we employ one-dimensional Reynolds-averaged Navier–Stokes (RANS) simulations idealized layer (ABL), using turbulence closures with a length-scale limiter. These represent mean effects surface roughness, Coriolis force, limited ABL depth, neutral stable conditions four input parameters: roughness length, parameter, maximum geostrophic...
Abstract. Offshore wind farms are more commonly installed in farm clusters, where interaction can lead to energy losses; hence, there is a need for numerical models that properly simulate interaction. This work proposes Reynolds-averaged Navier–Stokes (RANS) method efficiently the effect of neighboring on power and annual production. First, novel steady-state atmospheric inflow proposed tested application RANS simulations large farms. Second, RANS-based parameterization introduced, actuator...
Abstract. In wind energy, the effect of turbulence upon turbines is typically simulated using “input” time series based on spectra. The velocity components' spectra are characterized by amplitude turbulent fluctuations, as well length scale corresponding to dominant eddies. Following IEC standard, turbine load calculations commonly involve use Mann spectral-tensor model generate three-dimensional field. practice, this employed adjusting its three parameters: LMM (peak an undistorted...