Blar i Geophysical Institute på tidsskrift "Journal of Physics: Conference Series (JPCS)"
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Analysis of offshore wind spectra and coherence under neutral stability condition using the two LES models PALM and SOWFA
(Journal article; Peer reviewed, 2021)The Parallelized Large-Eddy Model (PALM) and the Simulator for Wind Farm Applications (SOWFA) have been used to simulate the marine boundary layer flows under neutral stability condition. The present work aims to investigate ... -
Analysis of turbulence models fitted to site, and their impact on the response of a bottom-fixed wind turbine
(Journal article; Peer reviewed, 2021)This study compares a wind field recommended by the wind turbine design standards to more realistic wind fields based on measurements. The widely used Mann spectral tensor model with inputs recommended by the standard, is ... -
Effects of negative shear on loads for a 15 MW offshore wind turbine during low-level jet events
(Journal article; Peer reviewed, 2023)Wind turbines are more often interacting with the negative shear region of a low-level jet due to increasing turbine sizes. However, the effects of negative shear on wind turbines are not sufficiently studied, particularly ... -
Evaluation of Gaussian wake models under different atmospheric stability conditions: Comparison with large eddy simulation results
(Journal article; Peer reviewed, 2020)The calculation of the velocity deficit in the wake of individual wind turbines is a fundamental part of the wind farm analysis. A good approximation of the wake deficit behind a single wind turbine will improve the power ... -
Mesoscale Simulation of Open Cellular Convection: Roles of Model Resolutions and Physics Parameterizations
(Journal article; Peer reviewed, 2022)The Open Cellular Convection (OCC) associated with cold air outbreaks is a common phenomenon over the North Sea where a large number of wind parks are presented. Thus, reliable numerical simulations of OCC events have great ... -
Multiscale Simulation of Offshore Wind Variability During Frontal Passage: Brief Implication on Turbines’ Wakes and Load
(Journal article; Peer reviewed, 2022)Enhancing the performance of offshore wind park power production requires, to a large extent, a better understanding of the interactions of wind farms and individual wind turbines with the atmospheric boundary layer over ... -
On Stochastic Reduced-Order and LES-based Models of Offshore Wind Turbine Wakes
(Journal article; Peer reviewed, 2020)In this paper, the primary objective is to investigate flow structures in the wake of wind turbines based on applying a truncated Proper Orthogonal Decomposition (POD) approach. This scheme decomposes the three-dimensional ... -
A one-year comparison of new wind atlases over the North Sea
(Journal article; Peer reviewed, 2022)The New European Wind Atlas (NEWA) and the Norwegian hindcast archive (NORA3) database have become publicly available since the end of 2019 and mid-2021, respectively. They aim to model the long-term wind climatology with ... -
Predictive Analysis of Machine Learning Schemes in Forecasting of Offshore Wind
(Journal article; Peer reviewed, 2020)High variability of wind in the farm areas causes a drastic instability in the energy markets. Therefore, precise forecast of wind speed plays a key role in the optimal prediction of offshore wind power. In this study, we ... -
Predictive Capability of WRF Cycling 3DVAR: LiDAR Assimilation at FINO1
(Journal article; Peer reviewed, 2021)In this study, we assess tentatively the predictive capability of the Weather Research and Forecasting (WRF) model and its Three-Dimensional Variational (3DVAR) system. We study the impact of LiDAR data assimilation on ... -
Statistic and coherence response of ship-based lidar observations to motion compensation
(Journal article; Peer reviewed, 2020)Ship-based profiling Lidar systems experience a strong influence of rotational and translational motion on beam direction and hence the line-of-sight velocity. This motion error is inherited by the retrieved 3-dimensional ...