Browsing NTNU Open by Author "Mann, Jakob"

Now showing items 1-5 of 5

    • Better turbulence spectra from velocity–azimuth display scanning wind lidar 

      Kelberlau, Felix; Mann, Jakob (Journal article; Peer reviewed, 2019)
      Turbulent velocity spectra derived from velocity–azimuth display (VAD) scanning wind lidars deviate from spectra derived from one-point measurements due to averaging effects and cross-contamination among the velocity ...

    • Cross-contamination effect on turbulence spectra from Doppler beam swinging wind lidar 

      Kelberlau, Felix; Mann, Jakob (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 ...

    • Lidars for Wind Tunnels - an IRPWind Joint Experiment Project 

      Sjöholm, Mikael; Vignaroli, Andrea; Angelou, Nikolas; Nielsen, Morten Busk; Mann, Jakob; Mikkelsen, Torben; Bolstad, Hans Christian; Merz, Karl Otto; Sætran, Lars Roar; Mühle, Franz Volker; Tiihonen, Mikko; Lethomäki, Ville (Journal article; Peer reviewed, 2017)
      Measurement campaigns with continuous-wave Doppler Lidars (Light detection and ranging) developed at DTU Wind Energy in Denmark were performed in two very different wind tunnels. Firstly, a measurement campaign in a small ...

    • Long-term research challenges in wind energy - a research agenda by the European Academy of Wind Energy 

      van Kuik, G. A. M.; Peinke, J.; Nijssen, R.; Lekou, D.; Mann, Jakob; Sørensen, J. N.; Ferreira, C. Simoa; van Wingerden, W.; Schlipf, D.; Gebraad, P.; Polinder, H.; Abrahamsen, A.; van Bussel, G. J. W.; Sørensen, J. D.; Tavner, P.; Bottasso, C. L.; Muskulus, Michael; Matha, D.; Lindeboom, H. J.; Degraer, S.; Kramer, O.; Lehnhoff, S.; Sonnenschein, M.; Sørensen, P. E.; Künneke, R. W.; Morthorst, P. E.; Skytte, K. (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 ...

    • Taking the Motion out of Floating Lidar: Turbulence Intensity Estimates with a Continuous-Wave Wind Lidar 

      Kelberlau, Felix; Neshaug, Vegar; Lønseth, Lasse; Bracchi, Tania; Mann, Jakob (Peer reviewed; Journal article, 2020)
      Due to their motion, floating wind lidars overestimate turbulence intensity ( TI ) compared to fixed lidars. We show how the motion of a floating continuous-wave velocity–azimuth display (VAD) scanning lidar in all six ...