Browsing Publikasjoner fra CRIStin - NTNU by Journals "Wind Energy"
Now showing items 21-38 of 38
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Nonlinear soil-pile interaction for offshore wind turbines
(Journal article; Peer reviewed, 2018)The current work presents a parametric study, which involves different generalized nonlinear mechanical formulations with different damping characteristics to account for the interaction between a monopile‐supported offshore ... -
Numerical modeling of the hydraulic blade pitch actuator in a spar‐type floating wind turbine considering fault conditions and their effects on global dynamic responses
(Peer reviewed; Journal article, 2020)This paper deals with numerical modeling of the hydraulic blade pitch actuator and its effect on the dynamic responses of a floating spar‐type wind turbine under valve fault conditions. A spar‐type floating wind turbine ... -
OC6 Phase II: Integration and verification of a new soil–structure interaction model for offshore wind design
(Peer reviewed; Journal article, 2021)This paper provides a summary of the work done within the OC6 Phase II project, which was focused on the implementation and verification of an advanced soil–structure interaction model for offshore wind system design and ... -
On design, modelling, and analysis of a 10‐MW medium‐speed drivetrain for offshore wind turbines
(Peer reviewed; Journal article, 2020)Utformingen av et drivverk med middels hastighet for 10-MW referanse offshore vindturbin for Danmarks Tekniske Universitet (DTU). Det foreslås en fire-punkts drivlinjeoppsett som er utstyrt med en girkasse med to planetrinn ... -
On gradient-based optimization of jacket structures for offshore wind turbines
(Journal article; Peer reviewed, 2018)During the bidding or very early design phases of jacket structures for offshore wind turbines, there may be very limited information available on meteorological conditions, soil conditions, turbine specifications, etc. ... -
Performance and wake of a Savonius vertical‐axis wind turbine under different incoming conditions
(Journal article; Peer reviewed, 2019)In this study, the performance, drag, and horizontal midplane wake characteristics of a vertical‐axis Savonius wind turbine are investigated experimentally. The turbine is drag driven and has a helical configuration, with ... -
Post‐installation adaptation of offshore wind turbine controls
(Journal article; Peer reviewed, 2020)The cost of offshore wind energy can be reduced by incorporating control strategies to reduce the support structures' load effects into the structural design process. While effective in reducing the cost of support structures, ... -
A probabilistic long-term framework for site-specific erosionanalysis of wind turbine blades: A case study of 31 Dutch sites
(Peer reviewed; Journal article, 2021)Rain-induced leading-edge erosion (LEE) of wind turbine blades (WTBs) is associated with high repair and maintenance costs. The effects of LEE can be triggered in less than 1 to 2 years for some wind turbine sites, whereas ... -
Response analysis and comparison of a spar-type floating offshore wind turbine and an onshore wind turbine under blade pitch controller faults
(Journal article; Peer reviewed, 2016)This paper analyses the effects of three pitch controller faults on the responses of an onshore wind turbine and a spar-type offshore floating wind turbine. These faults include: a stuck blade pitch actuator, a fixed value ... -
Rotor‐integrated modeling of wind turbine aerodynamics
(Peer reviewed; Journal article, 2021)A novel approach for the modeling of rotor-integrated aerodynamic loads is suggested to answer the need for a comprehensive, insightful, and analytical actuator disc model. All the six degrees of freedom (including tangential ... -
Seismic response of floating wind turbines due to seaquakes
(Peer reviewed; Journal article, 2022)Vertical seismic waves, which are primarily due to pressure waves in the ground, can propagate with the same intensity in the seawater and impact floating bodies such as floating wind turbines (FWTs). Part of this wave can ... -
Steady and transient inflow dynamics with actuator disk vortex theory
(Journal article; Peer reviewed, 2018)The actuator disk is a well‐known and widely used theoretical tool in wind engineering. This work proposes a new theory based on an actuator surface, capable of treating time‐varying vectorial load distributions and yaw/pitch ... -
The effects of coherent structures on the global response of floating offshore wind turbines
(Journal article; Peer reviewed, 2018)The global dynamic response of floating wind turbines is commonly simulated using aero‐hydro‐servo‐elastic tools that consider numerically generated wind files as input. Based on the guidelines given in existing standards, ... -
The value of airborne wind energy to the electricity system
(Peer reviewed; Journal article, 2021)Airborne wind energy (AWE) is a new power generation technology that harvests wind energy at high altitudes using tethered wings. The potentially higher energy yield, combined with expected lower costs compared to traditional ... -
Wave disturbance rejection for monopile offshore wind turbines
(Journal article; Peer reviewed, 2019)The dimensions of offshore wind turbine (OWT) support structures are governed by fatigue considerations. For 6‐ to 10‐MW OWTs, wave loads are often dominating in terms of fatigue utilization. The present work proposes a ... -
Wind farm voltage dip measurements
(Journal article; Peer reviewed, 2014)This paper is based on continuous measurements of voltages and currents from three wind farms for a period of 1 year, and the focus is on voltage dips. The purpose is to get an overview of the characteristics and rate of ... -
Wind tunnel investigation on the effect on the turbine tower on wind turbines wake symmetry
(Journal article; Peer reviewed, 2017)In wind farms, the wake of the upstream turbines becomes the inflow for the downstream machines. Ideally, the turbine wake is a stable vortex system. In reality, because of factors like background turbulence, mean flow ... -
Winglet optimization for a model-scale wind turbine
(Peer reviewed; Journal article, 2018)A winglet optimization method is developed and tested for a model-scale wind turbine. The best-performing winglet shape is obtained by constructing a Kriging surrogate model, which is refined using an infill criterion based ...