Blar i NTNU Open på tittel

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    • 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 Tunnel Testing of Bridge Decks 

      Horg, Svend Erik; Aas, Sigurd Berg (Master thesis, 2016)
      The studies done in this thesis was connected to an early stage implementation of a new test method for ?nding aerodynamic properties of bridge deck sections at the Norwegian University of Science and Technology (NTNU), ...

    • Wind tunnel testing of bridge decks - Vindtunneltesting av brutverrsnitt 

      Grongstad, Johannes Raaum; Kildal, Oddbjørn (Master thesis, 2018)
      First different designs of bridges were investigated to lay out an overview of what bridge designs there were on the table for production and testing. Different bridge cross sections seemed to be favourable for different ...

    • 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 Design: Evaluation of Dynamic Loads on Large Offshore Wind Turbines 

      Frøyd, Lars (Doktoravhandlinger ved NTNU, 1503-8181; 2012:241, Doctoral thesis, 2012)
      A design method for combined aerodynamic and structural (aeroelastic) design of large wind turbine blades has been developed, with the purpose of facilitating conceptual design, parametric studies, optimisation, or cost ...

    • Wind turbine drivetrains condition monitoring through SCADA data on farm level 

      Muller, Jelle (Master thesis, 2019)
      The offshore wind industry has grown rapidly over the last decade and drivetrains are increasing in size to reduce the cost of energy. These turbines are operating in a harsh environment. Adopting a preventive maintenance ...

    • 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 Turbine in Yawed Operation 

      Loland, Kari Medby (Master thesis, 2011)
      The task of this project was to investigate the near wake, performance characteristics and yaw moment on a model wind turbine. The test turbine is a horizontal axis three bladed machine with a rotor diameter of 0.9 meter. ...

    • Wind Turbine Propulsion of Boats and Ships 

      Bøckmann, Eirik (Master thesis, 2010)
      Increasing focus on reduction of CO2 emissions, and the possibility of future severe shortage of oil have sparked renewed interest in wind as supplementary propulsion of merchant ships. Several alternative solutions are ...

    • Wind Turbine Simulations with OpenFOAM 

      Hoem, Maria Enger (Master thesis, 2018)
      An actuator disk model is improved by including an impermeable hub and nacelle. This improves the wake flow a lot, but it turns out that the actuatorDiskExplicitForce model is mesh dependent. A mesh is made that provides ...

    • Wind Turbine Wake Interactions - The Influence of Shear on a Wind Turbine Wake 

      Jalil, Abdur Rahman (Master thesis, 2015)
      Full wake measurements have been performed on a model wind turbine at NTNU s wind tunnel to investigate the impact of shear flow compared to uniform flow on the wake flow. Mean and turbulent velocity measurements have been ...

    • Wind turbine wake meandering 

      Lynum, Susanne (Master thesis, 2013)
      In this master thesis the meandering of the wake of a three bladed horizontal axis model wind turbine has been studied. Measurements have been conducted by the use of four hot-wire probes located at multiple nearby points ...

    • Wind-driven Rain Exposure and Assessment of Building Integrated Photovoltaic Systems 

      Andenæs, Erlend (Master thesis, 2016)
      This thesis is written as the final semester project of the five-year Master of Science program of Civil and Environmental Engineering (Bygg- og Miljøteknikk) at the Norwegian University of Science and Technology (NTNU) ...

    • 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-induced Dynamic Response and Aeroelastic Stability of a Suspension Bridge crossing Sognefjorden 

      Odden, Trine Hollerud; Skyvulstad, Henrik (Master thesis, 2012)
      This thesis is a feasibility study, with regards to aerodynamic stability, about the possibility of constructing a suspension bridge with a main span of 3700m over the Sogne Fjord in Norway. The design wind velocity for ...

    • Wind-induced Dynamic Response and Aeroelastic Stability of a Suspension Bridge crossing Sognefjorden 

      Odden, Trine Hollerud; Skyvulstad, Henrik (Master thesis, 2012)
      This thesis is a feasibility study, with regards to aerodynamic stability, about the possibility of constructing a suspension bridge with a main span of 3700m over the Sogne Fjord in Norway. The design wind velocity for ...

    • Wind-induced Dynamic Response of High Rise Buildings 

      Bjørnland, Karl Hermann Mathias (Master thesis, 2013)
      This thesis aims to investigate the dynamic response of a high rise concrete structure. Calculations are performed for Lerkendal Hotel, a slender 75 meter high building located in Trondheim. Buffeting response has been the ...

    • Wind-Induced Response of Long-Span Suspension Bridges Subjected to Span-Wise Non-Uniform Winds: A Case Study 

      Forbord, Erlend Munkeby; Hjellvik, Hallvard (Master thesis, 2017)
      The Hardanger Bridge has a main span of 1 310 meters which makes it the longest suspension bridge in Norway and among the top 15 longest in the world as of 2017. The bridge consists of only two traffic lanes and one ...

    • 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 ...