Browsing Fakultet for ingeniørvitenskap (IV) by Journals "Wind Energy Science"
Now showing items 1-15 of 15
-
Blind test comparison of the performance and wake flow between two in-line wind turbines exposed to different turbulent inflow conditions
(Journal article; Peer reviewed, 2017)This is a summary of the results of the fourth blind test workshop that was held in Trondheim in October 2015. Herein, computational predictions on the performance of two in-line model wind turbines as well as the mean and ... -
Blind test comparison on the wake behind a yawed wind turbine
(Journal article; Peer reviewed, 2018)This article summarizes the results of the “Blind test 5” workshop, which was held in Visby, Sweden, in May 2017. This study compares the numerical predictions of the wake flow behind a model wind turbine operated in yaw ... -
Brief communication: Structural health monitoring for lifetime extension of offshore wind monopiles: can strain measurements at one level tell us everything?
(Journal article; Peer reviewed, 2017)Operators need accurate knowledge on structural reserves to decide about lifetime extension of offshore wind turbines. Load monitoring enables us to directly compare design loads with real loading histories of the support ... -
Comparing abnormalities in onshore and offshore vertical wind profiles
(Peer reviewed; Journal article, 2020)Understanding the vertical wind profile is paramount for design and operation of wind turbines. It is needed not only for extrapolation of the wind velocity to hub height but also for structural load calculations, to name ... -
Cross-contamination effect on turbulence spectra from Doppler beam swinging wind lidar
(Peer reviewed; Journal article, 2020)Turbulence velocity spectra are of high importance for the estimation of loads on wind turbines and other built structures, as well as for fitting measured turbulence values to turbulence models. Spectra generated from ... -
Decoupled simulations of offshore wind turbines with reduced rotor loads and aerodynamic damping
(Journal article; Peer reviewed, 2018)Abstract. Decoupled load simulations are a computationally efficient method to perform a dynamic analysis of an offshore wind turbine. Modelling the dynamic interactions between rotor and support structure, especially the ... -
Effect of foundation modelling on the fatigue lifetime of a monopile-based offshore wind turbine
(Journal article; Peer reviewed, 2017)everal studies have emphasized the importance of modelling foundation response with representative damping and stiffness characteristics in integrated analyses of offshore wind turbines (OWTs). For the monopile foundation, ... -
Hyperparameter tuning framework for calibrating analytical wake models using SCADA data of an offshore wind farm
(Journal article; Peer reviewed, 2024)This work presents a robust methodology for calibrating analytical wake models, as demonstrated on the velocity deficit parameters of the Gauss–curl hybrid model using 4 years of time series supervisory control and data ... -
Long-term research challenges in wind energy - a research agenda by the European Academy of Wind Energy
(Journal article; Peer reviewed, 2016)The European Academy of Wind Energy (eawe), representing universities and institutes with a significant wind energy programme in 14 countries, has discussed the long-term research challenges in wind energy. In contrast to ... -
Reducing the number of load cases for fatigue damage assessment of offshore wind turbine support structures using a simple severity-based sampling method
(Journal article; Peer reviewed, 2018)The large amount of computational effort required for a full fatigue assessment of offshore wind turbine support structures under operational conditions can make these analyses prohibitive, especially for applications like ... -
Reliability-based design optimization of offshore wind turbine support structures using analytical sensitivities and factorized uncertainty modeling
(Journal article; Peer reviewed, 2020)The need for cost-effective support structure designs for offshore wind turbines has led to continued interest in the development of design optimization methods. So far, almost no studies have considered the effect of ... -
Wind tunnel experiments on wind turbine wakes in yaw: effects of inflow turbulence and shear
(Journal article; Peer reviewed, 2018)The wake characteristics behind a yawed model wind turbine exposed to different customized inflow conditions are investigated. Laser Doppler anemometry is used to measure the wake flow in two planes at x∕D = 3 and x∕D = 6, ... -
Wind tunnel experiments on wind turbine wakes in yaw: redefining the wake width
(Journal article; Peer reviewed, 2018)This paper presents an investigation of wakes behind model wind turbines, including cases of yaw misalignment. Two different turbines were used and their wakes are compared, isolating effects of boundary conditions and ... -
Wind tunnel study on power output and yaw moments for two yaw-controlled model wind turbines
(Journal article; Peer reviewed, 2018)In this experimental wind tunnel study the effects of intentional yaw misalignment on the power production and loads of a downstream turbine are investigated for full and partial wake overlap. Power, thrust force and yaw ... -
Wind turbine drivetrains: state-of-the-art technologies and future development trends
(Journal article; Peer reviewed, 2022)