A5032996734- Meteorological Phenomena and Simulations
- Wind Energy Research and Development
- Wind and Air Flow Studies
- Fluid Dynamics and Turbulent Flows
- Plant Water Relations and Carbon Dynamics
- Remote Sensing and LiDAR Applications
- Aeolian processes and effects
- Atmospheric aerosols and clouds
- Energy Load and Power Forecasting
- Turbomachinery Performance and Optimization
- Hydrology and Sediment Transport Processes
- Market Dynamics and Volatility
- Fluid Dynamics and Vibration Analysis
- Wave and Wind Energy Systems
- Global Energy and Sustainability Research
- Advanced Aircraft Design and Technologies
- Marine and Offshore Engineering Studies
- Flow Measurement and Analysis
- Particle Accelerators and Free-Electron Lasers
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Pulsars and Gravitational Waves Research
- Combustion and flame dynamics
- Superconducting Materials and Applications
- Maritime Transport Emissions and Efficiency
DHI
2024
Fraunhofer Institute for Wind Energy Systems
2021-2023
Technical University of Denmark
2020-2021
Universitat de les Illes Balears
2020
National Institute of Meteorology
2019
Universidade Federal de Santa Catarina
2017
Abstract The accurate characterization of the vertical wind profile over sea that covers rotor swept area modern turbines is a key challenge for energy yield calculations. Since offshore measurements are scarce, early-phase projects tend to use numerical model outputs before planning dedicated measurement campaign. This study aims develop and validate machine-learning can assimilate parameters measured at first level meteorological masts as input provide speed covering more than weather...
Abstract. We present novel measurements from a field campaign that aims to characterize multi-scale flow patterns, ranging 0.1 10 km in time-resolved manner, mountainous region northwestern Spain with mountain–valley–ridge configuration. select two cases where topographic-flow interactions were measured by five synchronized scanning Doppler wind lidars along transect line includes cross section of the valley. observed hydraulic jump lee side mountain. For this case, Froude number transition...
Abstract An atmospheric hydraulic jump was observed over the Alaiz mountain range and Elorz valley near Pamplona, Spain from radial velocity retrievals performed with two scanning lidars during October 5 6, 2018. The occurred on lee side of close to its base location more than 2 km further downstream inside valley. Here, we simulate days using multi‐scale modeling capabilities Weather Research Forecasting model. We find that model is able reproduce in high detail matching qualitatively well...
Abstract The NEWA ALEX17 experiment was conducted with the objective of characterizing wind conditions upstream Alaiz Test Site for validation flow models. From intensive operational period, a case study has been selected Wakebench benchmark consisting four consecutive days relatively persistent winds from North. is centered around 118-m mast at site and six additional masts located along valley lee side ridge delimiting 8-km long area interest. follow-up GABLS3 diurnal cycle in flat terrain...
It is well known that when eddies are small, the eddy fluxes can be directly related to mean vertical gradients, so-called flux-gradient relation, but such a relation becomes weaker larger coherent structures. Here, we show this does not hold at heights relevant for wind energy applications. The flux–gradient assumes angle (β) between vector of flux horizontal momentum and gradient velocity zero, i.e., these vectors aligned. Our observations do support assumption, either onshore or offshore....
Abstract In this study, we demonstrate how to carry out the design optimization of floating offshore wind farms by considering impacts brought movements turbines. A steady state movement and flow model is applied in modelling process. This developed building a turbine surrogate for estimating power production turbines incorporating it an open-source static farm simulator, PyWake. Using methodology, layout problems are solved using algorithms like Random Search maximize energy yield while...
Abstract The commercial-scale deployment of floating offshore wind (FOW) projects is expected to take place in a diverse range sites that may differ significantly from existing fixed-bottom projects. FOW farms are particularly sensitive the water depth and meteorological oceanographic (metocean) geotechnical conditions at project site due wave-induced system motions loads as well anchoring constraints imposed by seafloor conditions. Uncertainty around will permeate through all aspects...
Abstract We propose a comprehensive methodology to incorporate filtering, interpolation and uncertainties estimation in the processing of scanning wind lidar data. A full-scale wake measurement campaign has been carried out at an 8-MW prototype turbine Bremerhaven, Germany, apply demonstrate procedure. The filtering data results average scan that fully covers rotor swept area. Once filtered scans are processed, all observations clustered capture matrix, where each bin can be...
Abstract. We present novel measurements from a field campaign that aims to characterize multi-scale flow patterns, ranging 0.1 10 km, in mountainous region Northwestern Spain with mountain-valley-ridge configuration. select two cases where topographic-flow interactions were measured by five synchronized scanning Doppler wind lidars along 10-km transect line, including cross-section of the valley flow. observed hydraulic jump lee-side mountain. The Froude number transition supercritical (>...
Abstract A common closure for the planetary boundary layer in numerical weather models assumes a direct relation between turbulent fluxes and mean wind vertical gradient, i.e., flux-gradient or K -theory. This assumption implies that angle β momentum stress vector gradient of velocity are aligned, = 0°. is not what we observe from measurements. We quantify misalignment offshore conditions using measurements long-range Doppler profiling lidar simulations New European Wind Atlas mesoscale...
Abstract Scanning lidars are increasingly being used for new measurement applications, such as wake measurements. This type of requires an uncertainty quantification, and the setup instruments should ideally be planned to minimize overall uncertainty. Based on a previous experimental study, we quantify scanning lidar campaign by analyzing pointing accuracy distinct configuration scenarios. The selected scenarios based single ground-based measuring downstream flow, mounted turbine’s nacelle...
In this talk, we present results of multi-lidar measurements from the Alaiz Experiment (ALEX17), carried out in a collaboration between DTU Wind Energy, CENER and UIB. Dual-Doppler synchronized (125 m a.g.l.) are performed by four WindScanner systems on top ridge mountain range that 6km apart. Results provide first step towards resource assessment using scanning lidars, at same time featuring challenges faced to obtain high data availability. The most common flow patterns also highlighted,...
Abstract. It is well known that when eddies are small, the eddy fluxes can be directly related to mean vertical gradients, so-called K-theory, but such relation becomes weaker larger coherent structures. Here, we show this does not hold at heights relevant for wind energy applications. The implies angle (β) between vector of flux horizontal momentum and gradient velocity zero, i.e., vectors aligned. This what observe from measurements performed both offshore onshore. We quantify misalignment...
An atmospheric hydraulic jump was observed over the Alaiz mountain range and Elorz valley near Pamplona, Spain from radial velocity retrievals performed with two scanning lidars during October 5 6, 2018. The occurred on lee side of moved more than kilometers further downstream base inside valley. Here, we simulate days using multi-scale modeling capabilities Weather Research Forecasting model. We find that model is able to reproduce at in high detail matching qualitatively well timing main...