Blar i Publikasjoner fra CRIStin - NTNU på tittel

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    • Wind deflection analysis of railway catenary under crosswind based on nonlinear finite element model and wind tunnel test 

      Song, Yang; Zhang, Mingjie; Øiseth, Ole Andre; Rønnquist, Anders (Peer reviewed; Journal article, 2022)
      This paper evaluates the railway catenary's wind deflection under crosswind based on wind tunnel experiments and a nonlinear finite element model. A catenary model is constructed based on the absolute nodal coordinate ...

    • Wind Estimation with Multirotor UAVs 

      Meier, Kilian; Hann, Richard; Skaloud, Jan; Garreau, Arthur (Peer reviewed; Journal article, 2022)
      Unmanned Aerial Vehicles (UAVs) have benefited from a tremendous increase in popularity over the past decade, which has inspired their application toward many novel and unique use cases. One of them is the use of UAVs in ...

    • Wind farm control - Part I: A review on control system conceptsand structures 

      Andersson, Leif Erik; Anaya-Lara, Olimpo; Tande, John Olav Giæver; Merz, Karl Otto; Imsland, Lars Struen (Journal article; Peer reviewed, 2021)
      Wind farm control design is a recently new area of research that has rapidly become a key enabler for the development of large wind farm projects and their safe and efficient connection to the power grid. A comprehensive ...

    • Wind farm voltage dip measurements 

      Marvik, Jorun Irene; Tande, John Olav Giæver; Uhlen, Kjetil (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 Field Variability in Complex Terrain: Lessons from the Hardanger Bridge 

      Fenerci, Aksel; Øiseth, Ole Andre (Chapter; Peer reviewed, 2019)
      Along the Coastal Highway E39 in the western coast of Norway, Norwegian Government is planning to build several extreme bridges spanning from 1.5 to 5 km. The region is typically mountainous with deep fjords seeping inland. ...

    • Wind in Complex Terrain - Lidar Measurements for Evaluation of CFD Simulations 

      Risan, Andrea; Lund, John Amund; Chang, Chi-Yao; Sætran, Lars Roar (Journal article; Peer reviewed, 2018)
      Computational Fluid Dynamics (CFD) is widely used to predict wind conditions for wind energy production purposes. However, as wind power development expands into areas of even more complex terrain and challenging flow ...

    • Wind power - An assault on local landscapes or an opportunity for modernization? 

      Rygg, Bente Johnsen (Journal article; Peer reviewed, 2012)
      Wind power development has produced controversies in many places. Some people see wind power as a sustainable source of energy, others see it as destroying nature and landscapes. The opposition to wind power is often ...

    • Wind power plant grid-forming control and influences on the power train and power system oscillation 

      Khazaeli Moghadam, Farid; Vrana, Til Kristian (Chapter, 2022)
      In future power systems, wind power plants are supposed to contribute in the voltage and frequency stability of the grid. For this purpose, the control strategy of the wind power-frequency converter system needs to change ...

    • Wind pressure coefficients for roof ventilation purposes 

      Gullbrekken, Lars; Uvsløkk, Sivert; Kvande, Tore; Pettersson, Kaj; Time, Berit (Journal article; Peer reviewed, 2018)
      Wind pressure coefficients (cp) are important inputs for analytical calculations of wind load. The aim of this research is to investigate wind pressure coefficients on a test house located in Norway in order to pave the ...

    • Wind tunnel experiments on wind turbine wakes in yaw: effects of inflow turbulence and shear 

      Bartl, Jan Michael Simon; Mühle, Franz Volker; Schottler, Jannik; Sætran, Lars Roar; Peinke, Joachim; Adaramola, Muyiwa S.; Holling, Micheal (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 

      Schottler, Jannik; Bartl, Jan Michael Simon; Mühle, Franz Volker; Sætran, Lars Roar; Peinke, Joachim; Hölling, Michael (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 investigation on the effect on the turbine tower on wind turbines wake symmetry 

      Pierella, F; Sætran, Lars Roar (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 ...

    • Wind tunnel study on power output and yaw moments for two yaw-controlled model wind turbines 

      Bartl, Jan Michael Simon; Mühle, Franz Volker; Sætran, Lars Roar (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 Tunnel Study on the Tip Speed Ratio’s Impact on a Wind Turbine Wake Development 

      Neunaber, Ingrid; Hölling, Michael; Obligado, Martin (Peer reviewed; Journal article, 2022)
      (based on the turbine diameter and the freestream velocity). For all cases, the mean streamwise velocity deficit at the centerline evolves close to a power law in the far wake, and we check the validity of the Jensen and ...

    • Wind turbine blade icing detection: a federated learning approach 

      Cheng, Xu; Shi, Fan; Liu, Yongping; Liu, Xiufeng; Huang, Lizhen (Peer reviewed; Journal article, 2022)
      Wind farms are often located at high latitudes, which entails a high risk of icing for wind turbine blades. Traditional anti-icing methods rely primarily on manual observation, the use of special materials, or external ...

    • Wind turbine drivetrains: state-of-the-art technologies and future development trends 

      Nejad, Amir R.; Keller, Jonathan; Guo, Yi; Sheng, Shawn; Polinder, Henk; Watson, Simon; Dong, Jianning; Qin, Zian; Ebrahimi, Amir; Schelenz, Ralf; Guzmán, Francisco Gutiérrez; Cornel, Daniel; Golafshan, Reza; Jacob, Georg; Blockmans, Bart; Bosmans, Jelle; Pluymers, Bert; Carroll, James; Koukoura, Sofia; Hart, Edward; McDonald, Alasdair; Natarajan, Anand; Torsvik, Jone; Khazaeli Moghadam, Farid; Daems, Pieter-Jan; Verstraeten, Timothy; Peeters, Cédric; Helsen, Jan (Journal article; Peer reviewed, 2022)

    • Wind-driven upwelling of iron sustains dense blooms and food webs in the eastern Weddell Gyre 

      Moreau, Sebastian; Hattermann, Tore; de Steur, Laura; Kauko, Hanna Maria; Ahonen, Heidi; Ardelan, Murat van; Assmy, Philipp; Chierici, Melissa; Descamps, Sebastien; Dinter, Tilman; Falkenhaug, Tone; Fransson, Agneta; Grønningsæter, Eirik; Hallfredsson, Elvar Halldor; Huhn, Oliver; Lebrun, Anais; Lowther, Andrew; Lübcker, Nico; Monteiro, Pedro; Peeken, Ilka; Roychoudhury, Alakendra; Różańska, Magdalena; Ryan-Keogh, Thomas; Sanchez Puerto, Nicolas; Singh, Asmita; Simonsen, Jan Henrik; Steiger, Nadine; Thomalla, Sandy J.; van Tonder, Andre; Wiktor, Josef M; Steen, Harald (Peer reviewed; Journal article, 2023)
      The Southern Ocean is a major sink of anthropogenic CO2 and an important foraging area for top trophic level consumers. However, iron limitation sets an upper limit to primary productivity. Here we report on a considerably ...

    • Wind-wave directional effects on fatigue of bottom-fixed offshore wind turbine 

      Sørum, Stian Høegh; Krokstad, Jørgen R; Amdahl, Jørgen (Journal article; Peer reviewed, 2019)
      The current trend for offshore wind energy is that larger turbines are placed on monopile foundations at increasing water depth. This requires larger foundations, increasing the importance of hydrodynamic loading. It is ...

    • Wind-wave misalignment effects on floating wind turbines: motions and tower load effects 

      Bachynski, Erin Elizabeth; Kvittem, Marit Irene; Luan, Chenyu; Moan, Torgeir (Journal article; Peer reviewed, 2014)
      The dynamic responses of a spar, tension leg platform (TLP), and two semisubmersible floating wind turbines (FWTs) in selected misaligned wind and wave conditions are investigated using numerical simulation with an ...

    • Windjammer: Finding Purpose and Meaning on a Tall Ship Adventure 

      Dyrdal, Gunvor Marie; Løvoll, Helga Synnevåg (Peer reviewed; Journal article, 2023)
      The Windjammer project started in 2018 as a social entrepreneurship program in Norway for adolescents at risk of social drop-out and societal exclusion. While the effects on society of such programs are difficult to measure, ...