Niels N. Sørensen

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  1. 2013
  2. E-pub ahead of print

    A simple atmospheric boundary layer model applied to large eddy simulations of wind turbine wakes. / Troldborg, Niels; Sørensen, Jens Nørkær; Mikkelsen, Robert Flemming; Sørensen, Niels N.

    In: Wind Energy, 2013.

    Publication: Research - peer-review › Journal article – Annual report year: 2013

  3. Published

    Rotor Performance Enhancement Using Slats on the Inner Part of a 10MW Rotor. / Gaunaa, Mac; Zahle, Frederik; Sørensen, Niels N.; Bak, Christian; Réthoré, Pierre-Elouan.

    In: Proceedings og EWEA 2013. EWEA - The European Wind Energy Association, 2013.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2013

  4. Published

    Rotor Performance Enhancement Using Slats on the Inner Part of a 10MW Rotor. / Gaunaa, Mac (Author); Zahle, Frederik (Author); Sørensen, Niels N. (Author); Bak, Christian (Author); Réthoré, Pierre-Elouan (Author).

    2013. EWEA - The European Wind Energy Association.EWEA 2013 - European Wind Energy Conference & Exhibition, Vienna, Austria, 04-02-13.

    Publication: Research › Sound/Visual production (digital) – Annual report year: 2013

  5. 2012
  6. Published

    A discrete force allocation algorithm for modelling wind turbines in computational fluid dynamics. / Réthoré, Pierre-Elouan; Sørensen, Niels N.

    In: Wind Energy, Vol. 15, No. 7, 2012, p. 915-926.

    Publication: Research - peer-review › Journal article – Annual report year: 2011

  7. Published

    Analysis of 3D Stall Models for Wind Turbine Blades Using Data from the MEXICO Experiment. / Guntur, Srinivas; Bak, Christian; Sørensen, Niels N.

    In: Proceedings of the 13th International Conference on Wind Engineering. 2012.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

  8. Published

    Atmospheric stability and complex terrain - Comparing measurements and CFD. / Koblitz, Tilman (Author); Bechmann, Andreas (Author); Berg, Jacob (Author); Sogachev, Andrey (Author); Sørensen, Niels N. (Author); Réthoré, Pierre-Elouan (Author).

    2012. The science of Making Torque from Wind 2012, Oldenburg, Germany, 09-10-12.

    Publication: Research › Sound/Visual production (digital) – Annual report year: 2012

  9. Published

    Atmospheric stability in CFD – Representation of the diurnal cycle in the atmospheric boundary layer. / Koblitz, Tilman; Bechmann, Andreas; Sogachev, Andrey; Sørensen, Niels N.

    In: Proceedings. EWEA - The European Wind Energy Association, 2012.

    Publication: Research - peer-review › Conference abstract in proceedings – Annual report year: 2012

  10. Published

    Atmospheric stability in CFD – Representation of the diurnal cycle in the atmospheric boundary layer. / Koblitz, Tilman; Bechmann, Andreas; Sogachev, Andrey; Sørensen, Niels N.

    2012. Poster session presented at EWEA 2012 - European Wind Energy Conference & Exhibition, Copenhagen, Denmark.

    Publication: Research - peer-review › Poster – Annual report year: 2012

  11. Published

    Comparison of four different models of vortex generators. / Fernandez, U.; Réthoré, Pierre-Elouan; Sørensen, Niels N.; Velte, Clara Marika; Zahle, Frederik; Egusquiza, E.

    In: Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition. EWEA - The European Wind Energy Association, 2012.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

  12. Published

    Comparison of openfoam and ellipsys for modelling the wind ressources in complex terrain. / Réthoré, Pierre-Elouan; Martinez, Benjamin ; Cavar, Dalibor; Zahle, Frederik; Berg, Jacob; Sørensen, Niels N.

    In: Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition. EWEA - The European Wind Energy Association, 2012.

    Publication: Research - peer-review › Conference abstract in proceedings – Annual report year: 2012

  13. Published

    Comparison of openfoam and ellipsys for modelling the wind ressources in complex terrain. / Réthoré, Pierre-Elouan; Martinez, Benjamin ; Cavar, Dalibor; Zahle, Frederik; Berg, Jacob; Sørensen, Niels N.

    2012. Poster session presented at EWEA 2012 - European Wind Energy Conference & Exhibition, Copenhagen, Denmark.

    Publication: Research - peer-review › Poster – Annual report year: 2012

  14. Published

    Comparison of the Wake of Different Types of Wind Turbine CFD Models : AIAA 2012-0237. / Troldborg, Niels; Zahle, Frederik; Réthoré, Pierre-Elouan; Sørensen, Niels N.

    In: American Institute of Aeronautics and Astronautics. Meeting Papers on Disc, Vol. 4, 2012, p. 3407-3417.

    Publication: Research - peer-review › Conference article – Annual report year: 2012

  15. Published

    Comparison of wind turbine wake properties in non-uniform inflow predicted by different CFD rotor models. / Troldborg, Niels (Author); Zahle, Frederik (Author); Sørensen, Niels N. (Author); Réthoré, Pierre-Elouan (Author).

    2012. The science of Making Torque from Wind 2012, Oldenburg, Germany, 09-10-12.

    Publication: Research › Sound/Visual production (digital) – Annual report year: 2012

  16. Published

    Computation of the National Renewable Energy Laboratory Phase-VI rotor in pitch motion during standstill. / Sørensen, Niels N.; Schreck, S.

    In: Wind Energy, Vol. 15, No. 3, 2012, p. 425-442.

    Publication: Research - peer-review › Journal article – Annual report year: 2011

  17. Published

    Design and Wind Tunnel Testing of a Thick, Multi-Element High-Lift Airfoil. / Zahle, Frederik; Gaunaa, Mac; Sørensen, Niels N.; Bak, Christian.

    In: Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition. EWEA - The European Wind Energy Association, 2012.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

  18. Published

    Evaluation of several methods of determining the angle of attack on wind turbine blades. / Guntur, Srinivas (Author); Sørensen, Niels N. (Author).

    2012. The science of Making Torque from Wind 2012, Oldenburg, Germany, 09-10-12.

    Publication: Research › Sound/Visual production (digital) – Annual report year: 2012

  19. Published

    How fine is fine enough when doing CFD terrain simulations. / Sørensen, Niels N.; Bechmann, Andreas; Réthoré, Pierre-Elouan; Cavar, Dalibor; Kelly, Mark C.; Troen, Ib.

    In: Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition. EWEA - The European Wind Energy Association, 2012.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

  20. Published

    How fine is fine enough when doing CFD terrain simulations. / Sørensen, Niels N.; Bechmann, Andreas; Réthoré, Pierre-Elouan; Cavar, Dalibor; Kelly, Mark C.; Troen, Ib.

    2012. Poster session presented at EWEA 2012 - European Wind Energy Conference & Exhibition, Copenhagen, Denmark.

    Publication: Research - peer-review › Poster – Annual report year: 2012

  21. Published

    Modelling of unsteady airfoil aerodynamics for the prediction of blade standstill vibrations. / Skrzypinski, Witold Robert; Gaunaa, Mac; Sørensen, Niels N.; Zahle, Frederik.

    In: Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition. EWEA - The European Wind Energy Association, 2012.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

  22. E-pub ahead of print

    Near wake Reynolds-averaged Navier–Stokes predictions of the wake behind the MEXICO rotor in axial and yawed flow conditions. / Sørensen, Niels N.; Bechmann, Andreas; Réthoré, Pierre-Elouan; Zahle, Frederik.

    In: Wind Energy, 2012.

    Publication: Research - peer-review › Journal article – Annual report year: 2012

  23. Published

    Numerical modeling of the airflow around a forest edge using LiDAR-derived forest heigths. / Boudreault, Louis-Etienne; Dellwik, Ebba; Bechmann, Andreas; Sørensen, Niels N.; Sogachev, Andrey.

    2012. Paper presented at 8th PhD Seminar on Wind Energy in Europe, Zurich, Switzerland.

    Publication: Research › Paper – Annual report year: 2013

  24. Published

    Parametric Study of the Device Angle Dependency of a Single Vortex Generator on a Flat Plate. / Fernandez, U.; Réthoré, Pierre-Elouan; Sørensen, Niels N.; Velte, Clara Marika; Zahle, Frederik; Egusquiza, E.

    2012. Paper presented at 10th World Congress on Computational Mechanics (WCCM 2012), Sao Paulo, Brazil.

    Publication: Research - peer-review › Paper – Annual report year: 2012

  25. Published

    Quantification of the Effects of Using Slats on the Inner Part of a 10MW Rotor. / Gaunaa, Mac; Zahle, Frederik; Sørensen, Niels N.; Bak, Christian.

    In: Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition. EWEA - The European Wind Energy Association, 2012.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

  26. Published

    Quantification of the Effects of Using Slats on the Inner Part of a 10MW Rotor. / Gaunaa, Mac; Zahle, Frederik; Sørensen, Niels N.; Bak, Christian.

    2012. Poster session presented at EWEA 2012 - European Wind Energy Conference & Exhibition, Copenhagen, Denmark.

    Publication: Research - peer-review › Poster – Annual report year: 2012

  27. Published

    Self-similarity and helical symmetry in vortex generator flow simulations. / Fernandez, U.; Velte, Clara Marika; Réthoré, Pierre-Elouan; Sørensen, Niels N.

    In: Proceedings of Torque 2012, The science of making torque from wind. 2012.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

  28. Published

    Simulations of a rotor with active deformable trailing edge flaps in half-wake inflow: Comparison of EllipSys 3D with HAWC2. / Barlas, Thanasis K.; Zahle, Frederik; Sørensen, Niels N.; Gaunaa, Mac; Bergami, Leonardo.

    In: Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition. EWEA - The European Wind Energy Association, 2012.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

  29. Published

    Transient DDES computations of the NREL Phase-VI rotor in axial flow conditions. / Sørensen, Niels N. (Author); Schreck, Scott (Author).

    2012. The science of Making Torque from Wind 2012, Oldenburg, Germany, 09-10-12.

    Publication: Research › Sound/Visual production (digital) – Annual report year: 2012

  30. 2011
  31. Published

    Simulation of Moving Trailing Edge Flaps on a Wind Turbine Blade using a Navier-Stokes based Immersed Boundary Method. / Behrens, Tim; Shen, Wen Zhong (Supervisor); Zhu, Wei Jun (Supervisor); Sørensen, Jens Nørkær (Supervisor); Sørensen, Niels N. (Supervisor).

    DTU Mechanical Engineering, 2011. 131 p.

    Publication: Research › Ph.d. thesis – Annual report year: 2012

  32. Published

    3D CFD computations of trasitional flows using DES and a correlation based transition model. / Sørensen, Niels N.; Bechmann, Andreas; Zahle, Frederik.

    In: Wind Energy, Vol. 14, No. 1, 2011, p. 77-90.

    Publication: Research - peer-review › Journal article – Annual report year: 2010

  33. Published

    A computational efficient algorithm for the aerodynamic response of non-straight blades. / Gaunaa, Mac; Réthoré, Pierre-Elouan Mikael; Sørensen, Niels N.; Døssing, Mads.

    In: Proceedings. EWEA, 2011.

    Publication: Research › Article in proceedings – Annual report year: 2011

  34. Published

    A computationally efficient method for determining the aerodynamic performance of kites for wind energy applications. / Gaunaa, Mac; Paralta Carqueija, Pedro Filipe; Réthoré, Pierre-Elouan Mikael; Sørensen, Niels N.

    In: Proceedings. EWEA, 2011.

    Publication: Research › Article in proceedings – Annual report year: 2011

  35. Published

    Aerodynamic damping of lateral tower vibrations. / Kallesøe, Bjarne Skovmose; Sørensen, Niels N.; Troldborg, Niels.

    In: Presentations from the Aeroelastic Workshop – latest results from AeroOpt. ed. / Morten Hartvig Hansen. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2011. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1796(EN)).

    Publication: Research › Conference abstract in proceedings – Annual report year: 2011

  36. Published

    A Small Study of Flatback Airfoils. / Sørensen, Niels N.

    In: Presentations from the Aeroelastic Workshop – latest results from AeroOpt. ed. / Morten Hartvig Hansen. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2011. p. 153-195 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1769(EN)).

    Publication: Research › Conference abstract in proceedings – Annual report year: 2011

  37. Published

    CFD simulations of the MEXICO rotor. / Bechmann, Andreas; Sørensen, Niels N.; Zahle, Frederik.

    In: Wind Energy, Vol. 14, No. 5, 2011, p. 677-689.

    Publication: Research - peer-review › Journal article – Annual report year: 2011

  38. Published

    CFD Simulations of the Mexico Wind Tunnel and Wind Turbine. / Réthoré, Pierre-Elouan Mikael; Zahle, Frederik; Sørensen, Niels N.; Bechmann, Andreas.

    In: Proceedings. EWEA, 2011.

    Publication: Research › Article in proceedings – Annual report year: 2011

  39. Published

    Characterization of the unsteady flow in the nacelle region of a modern wind turbine. / Zahle, Frederik; Sørensen, Niels N.

    In: Wind Energy, Vol. 14, No. 2, 2011, p. 271-283.

    Publication: Research - peer-review › Journal article – Annual report year: 2010

  40. Published

    Comparison of the near wake of different kinds of wind turbine CFD models. / Réthoré, Pierre-Elouan Mikael; Troldborg, Niels; Zahle, Frederik; Sørensen, Niels N.

    2011. Abstract from Wake conference, Visby (SE), 8-9 Jun, .

    Publication: Research › Conference abstract for conference – Annual report year: 2011

  41. Published

    Conclusions of the Bolund Experiment and Blind Comparison. / Bechmann, Andreas (Invited author); Sørensen, Niels N. (Invited author); Berg, Jacob (Invited author); Mann, Jakob (Invited author); Réthoré, Pierre-Elouan Mikael (Invited author).

    In: Proceedings. 2011.

    Publication: Research › Conference abstract in proceedings – Annual report year: 2011

  42. Published

    Design and test of a thick, flatback, high-lift multi-element airfoil. / Zahle, Frederik; Gaunaa, Mac; Bak, Christian; Sørensen, Niels N.

    In: Presentations from the Aeroelastic Workshop – latest results from AeroOpt. ed. / Morten Hartvig Hansen. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2011. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1796(EN)).

    Publication: Research › Conference abstract in proceedings – Annual report year: 2011

  43. Published

    Design og optimering af vingetipper for vindmøller : Slutrapport. / Sørensen, Jens Nørkær; Shen, Wen Zhong; Zhu, Wei Jun; Borbye, Jakob; Okulov, Valery; Mikkelsen, Robert Flemming; Gaunaa, Mac; Réthoré, Pierre-Elouan Mikael; Sørensen, Niels N.

    DTU Mekanik, 2011. 10 p.

    Publication: Research › Report – Annual report year: 2011

  44. Published

    Hybrid RANS/LES applied to complex terrain. / Bechmann, Andreas; Sørensen, Niels N.

    In: Wind Energy, Vol. 14, No. 2, 2011, p. 225-237.

    Publication: Research - peer-review › Journal article – Annual report year: 2010

  45. Published

    Imposing resolved turbulence in CFD simulations. / Gilling, L.; Sørensen, Niels N.

    In: Wind Energy, Vol. 14, No. 5, 2011, p. 661-676.

    Publication: Research - peer-review › Journal article – Annual report year: 2011

  46. Published

    Investigation of the load reduction potential of two trailing edge flap controls using CFD. / Heinz, Joachim Christian; Sørensen, Niels N.; Zahle, Frederik.

    In: Wind Energy, Vol. 14, No. 3, 2011, p. 449-462.

    Publication: Research - peer-review › Journal article – Annual report year: 2011

  47. Published

    Mexico Wind Tunnel and Wind Turbine modelled in CFD. / Réthoré, Pierre-Elouan Mikael; Sørensen, Niels N.; Zahle, Frederik; Bechmann, Andreas; Aagaard Madsen, Helge.

    In: Proceedings. AIAA, 2011. p. AIAA-2011-3373.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2011

  48. Published

    Status of airfoil design and plans for wind tunnel tests of new thick airfoils. / Bak, Christian; Gaunaa, Mac; Sørensen, Niels N.; Bertagnolio, Franck.

    In: Presentations from the Aeroelastic Workshop – latest results from AeroOpt. ed. / Morten Hartvig Hansen. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2011. p. 197-202 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1769(EN)).

    Publication: Research › Conference abstract in proceedings – Annual report year: 2011

  49. E-pub ahead of print

    The Bolund Experiment. Part II: Blind Comparison of Microscale Flow Models. / Bechmann, Andreas; Sørensen, Niels N.; Berg, Jacob; Mann, Jakob; Réthoré, Pierre-Elouan Mikael.

    In: Boundary-Layer Meteorology, 2011.

    Publication: Research - peer-review › Journal article – Annual report year: 2011

  50. Published

    Unsteady Navier-Stokes Simulations of a Rotor Operating in Wake. / Zahle, Frederik; Aagaard Madsen, Helge; Sørensen, Niels N.

    In: Proceedings. EWEA, 2011.

    Publication: Research › Article in proceedings – Annual report year: 2011

  51. 2010
  52. Published

    A Comparison of Two Devices for Distributed Active Load Control of Wind Turbine Blades. / Bæk, Peter; Gaunaa, Mac; Sørensen, Niels N.; Fuglsang, Peter.

    In: Torque 2010: The science of making torque from wind. EWEA, 2010. p. 611-617.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2010

  53. Published

    Anvendelse af CFD i vindenergi. / Sørensen, Niels N.

    2010. Abstract from Vinddag 2010: Offshore, Risø (DK), 17 Jun, .

    Publication: Research › Conference abstract for conference – Annual report year: 2010

  54. Published

    A stochastic model for the simulation of wind turbine blades in static stall. / Bertagnolio, Franck; Rasmussen, Flemming; Sørensen, Niels N.; Johansen, Jeppe; Aagaard Madsen, Helge.

    In: Wind Energy, Vol. 13, No. 4, 2010, p. 323-338.

    Publication: Research - peer-review › Journal article – Annual report year: 2010

  55. Published

    Blind Comparison Simulation Cases. / Bechmann, Andreas; Berg, Jacob; Courtney, Michael; Ejsing Jørgensen, Hans; Mann, Jakob; Sørensen, Niels N.

    In: Presentations. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2010. p. 153-161 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1745(EN)).

    Publication: Research › Article in proceedings – Annual report year: 2010

  56. Published

    CFD Applications in Wind Energy. / Sørensen, Niels N.

    2010. Paper presented at 1st Wind Turbine Computational Aerodynamics Lecture Series, United Kingdom.

    Publication: Research › Paper – Annual report year: 2010

  57. Published

    CFD for Rotor Aerodynamics. / Sørensen, Niels N.

    2010. Paper presented at 1st Wind Turbine Computational Aerodynamics Lecture Series, United Kingdom.

    Publication: Research › Paper – Annual report year: 2010

  58. Published

    Computation of the NREL Phase-VI Rotor In Pitch Motion During Standstill. / Sørensen, Niels N.; Schreck, Scott.

    In: Torque 2010: The science of making torque from wind. EWEA, 2010. p. 203-218.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2010

  59. Published

    Hybrid RANS/LES method for wind flow over complex terrain. / Bechmann, Andreas; Sørensen, Niels N.

    In: Wind Energy, Vol. 13, No. 1, 2010, p. 36-50.

    Publication: Research - peer-review › Journal article – Annual report year: 2010

  60. Published

    Modeling Issues with Wind Turbine Wake and Atmospheric Turbulence. / Réthoré, Pierre-Elouan Mikael; Sørensen, Niels N.; Bechmann, Andreas.

    In: Torque 2010: The science of making torque from wind. EWEA, 2010. p. 349-357.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2010

  61. Published

    RANS CFD simulations of flow around Bolund. / Sørensen, Niels N.

    In: Presentations. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2010. p. 137-152 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1745(EN)).

    Publication: Research › Conference abstract in proceedings – Annual report year: 2010

  62. Published

    Sammenfatning af EFP07 – Metoder til kortlægning af vindforhold i komplekst terræn. / Bechmann, Andreas; Berg, Jacob; Courtney, Michael; Ejsing Jørgensen, Hans; Mann, Jakob; Sørensen, Niels N.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2010. 8 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1746(DA)).

    Publication: Research › Report – Annual report year: 2010

  63. Published

    The Bolund Experiment. / Bechmann, Andreas; Berg, Jacob; Courtney, Michael; Ejsing Jørgensen, Hans; Mann, Jakob; Sørensen, Niels N.

    In: Presentations. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2010. p. 33-71 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1745(EN)).

    Publication: Research › Conference abstract in proceedings – Annual report year: 2010

  64. Published

    The DAN-AERO MW ecperiments. / Aagaard Madsen, Helge; Bak, Christian; Schmidt Paulsen, Uwe; Gaunaa, Mac; Sørensen, Niels N.; Fuglsang, Peter; Romblad, Jonas; Olsen, Niels A.; Enevoldsen, Peder; Laursen, Jesper; Jensen, Leo.

    In: Conference proceedings. Reston, VA (US) : American Institute of Aeronautics & Astronautics, 2010. p. AIAA 2010-0645.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2010

  65. Published

    Thick Multiple Element Airfoils for use on the Inner Part of Wind Turbine Rotors. / Gaunaa, Mac; Sørensen, Niels N.; Bak, Christian.

    In: Torque 2010: The science of making torque from wind. EWEA, 2010. p. 135-152.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2010

  66. Published

    Turbulence modelling. / Sørensen, Niels N.

    2010. Paper presented at 1st Wind Turbine Computational Aerodynamics Lecture Series, United Kingdom.

    Publication: Research › Paper – Annual report year: 2010

  67. Published

    Upwind Navier-Stokes Rotor Flow Simulations with ground proximity and shear. / Zahle, Frederik; Sørensen, Niels N.

    In: Torque 2010: The science of making torque from wind. EWEA, 2010. p. 255-263.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2010

  68. Published

    Validation of an Actuator Disc Model. / Réthoré, Pierre-Elouan Mikael; Sørensen, Niels N.; Zahle, Frederik.

    In: EWEC 2010 Proceedings online. EWEA, 2010.

    Publication: Research › Article in proceedings – Annual report year: 2010

  69. 2009
  70. Published

    3D CFD computations of transitional flows using DES and a correlation based transition model. / Sørensen, Niels N.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2009. 19 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1692(EN)).

    Publication: Research › Report – Annual report year: 2009

  71. Published

    Airfoil Computations using the γ - Reθ Model. / Sørensen, Niels N.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2009. 18 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1693(EN)).

    Publication: Research › Report – Annual report year: 2009

  72. Published

    Calculations of Flow around an Airfoil with a Trailing Edge Flap by Use of an Immersed Boundary Method. / Behrens, Tim; Zhu, Wei Jun; Shen, Wen Zhong; Sørensen, Jens Nørkær; Sørensen, Niels N.; Wedel-Heinen, Jens Jakob.

    In: EWEC 2009 Proceedings online. EWEC, 2009.

    Publication: Research › Article in proceedings – Annual report year: 2009

  73. Published

    CFD for Wind Farm Siting Analysis. / Sørensen, Niels N. (Author); Bechmann, Andreas (Author); Johansen, Jeppe (Author).

    2009. Seminar on CFD and wind power, Fredericia (DK), 4 Feb., 01-01-09.

    Publication: Research › Sound/Visual production (digital) – Annual report year: 2009

  74. Published

    CFD modelling of laminar-turbulent transition for airfoils and rotors using the gamma-(Re)over-tilde (theta) model. / Sørensen, Niels N.

    In: Wind Energy, Vol. 12, No. 8, 2009, p. 715-733.

    Publication: Research - peer-review › Journal article – Annual report year: 2009

  75. Published

    CFD simulation of the MEXICO rotor wake. / Bechmann, Andreas; Sørensen, Niels N.

    In: EWEC 2009 Scientific proceedings. EWEC, 2009. p. 64-68.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2009

  76. Published

    Characterisation of the unsteady flow in the nacelle region of a modern wind turbine. / Zahle, Frederik; Sørensen, Niels N.

    In: EWEC 2009 Proceedings online. EWEC, 2009.

    Publication: Research › Article in proceedings – Annual report year: 2009

  77. Published

    Characterisation of the Unsteady Flow in the Nacelle Region of a Modern Wind Turbine. / Zahle, Frederik; Sørensen, Niels N.

    In: Research in Aeroelasticity EFP-2007-II. ed. / Thomas Buhl. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2009. p. 30-41 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1698(EN)).

    Publication: Research › Report chapter – Annual report year: 2009

  78. Published

    Correlation Based Transition Modeling of Laminar to Turbulent Transition. / Sørensen, Niels N.

    In: Research in Aeroelasticity EFP-2007-II. ed. / Thomas Buhl. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2009. p. 42-60 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1698(EN)).

    Publication: Research › Report chapter – Annual report year: 2009

  79. Published

    Design of a wind turbine rotor for maximum aerodynamic efficiency. / Johansen, Jeppe; Aagaard Madsen, Helge; Gaunaa, Mac; Bak, Christian; Sørensen, Niels N.

    In: Wind Energy, Vol. 12, No. 3, 2009, p. 261-273.

    Publication: Research - peer-review › Journal article – Annual report year: 2009

  80. Published

    Evaluation of tower shadow effects on various wind turbine concepts. / Zahle, Frederik; Aagaard Madsen, Helge; Sørensen, Niels N.

    In: Research in Aeroelasticity EFP-2007-II. ed. / Thomas Buhl. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2009. p. 11-29 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1698(EN)).

    Publication: Research › Report chapter – Annual report year: 2009

  81. Published

    Imposing Resolved Turbulence by an Actuator in a Detached Eddy Simulation of an Airfoil. / Gilling, Lasse; Sørensen, Niels N.; Rethore, Pierre-Elouan Mikael.

    In: EWEC 2009 Proceedings online. EWEC, 2009.

    Publication: Research › Article in proceedings – Annual report year: 2009

  82. Published

    Prediction of Multi Element Airfoils With the EllipSys Code. / Sørensen, Niels N.

    In: Research in Aeroelasticity EFP-2007-II. ed. / Thomas Buhl. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2009. p. 95-102 (Risø-R-1698(EN)).

    Publication: Research › Book chapter – Annual report year: 2009

  83. Published

    Study of the atmospheric wake turbulence of a CFD actuator disc model. / Rethore, Pierre-Elouan Mikael; Sørensen, Niels N.; Bechmann, Andreas; Zahle, Frederik.

    In: EWEC 2009 Proceedings online. EWEC, 2009.

    Publication: Research › Article in proceedings – Annual report year: 2009

  84. Published

    The Bolund experiment : Overview and background. / Bechmann, Andreas; Berg, Jacob; Christiansen, Lars C.; Courtney, Michael; Johansen, Jeppe; Ejsing Jørgensen, Hans; Mann, Jakob; Mogensen, Søren H.; Sørensen, Niels N.

    In: EWEC 2009 Proceedings online. EWEC, 2009.

    Publication: Research › Conference abstract in proceedings – Annual report year: 2009

  85. Published

    The Bolund Experiment: Blind Comparison of Models for Wind in Complex Terrain. / Bechmann, Andreas (Invited author); Berg, J. (Invited author); Courtney, Michael (Invited author); Jørgensen, H. (Invited author); Mann, Jakob (Invited author); Sørensen, Niels N. (Invited author).

    2009. Abstract from 2009 AGU Fall Meeting, San Fransisco, CA, United States.

    Publication: Research › Conference abstract for conference – Annual report year: 2009

  86. Published

    The Bolund Experiment: Overview and Background. / Bechmann, Andreas; Berg, Jacob; Courtney, Michael; Ejsing Jørgensen, Hans; Mann, Jakob; Sørensen, Niels N.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2009. 50 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1658(EN)).

    Publication: Research › Report – Annual report year: 2009

  87. Published

    Thick Airfoils and High Lift. / Gaunaa, Mac; Sørensen, Niels N.; Bak, Christian.

    In: Research in Aeroelasticity EFP-2007-II. ed. / Thomas Buhl. Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2009. p. 103-114 (Risø-R-1698(EN)).

    Publication: Research › Book chapter – Annual report year: 2009

  88. Published

    Turbulence closure strategies for modelling wind turbines wake. / Rethore, Pierre-Elouan Mikael; Sørensen, Niels N.

    In: Extended Abstracts. ed. / Antonio Crespo; Gunner Chr. Larsen; Emilio Migoya. Universidad Politecnica de Madrid, 2009. p. 19-21.

    Publication: Research › Conference abstract in proceedings – Annual report year: 2009

  89. Published

    Wind Turbine Rotor-Tower Interaction Using an Incompressible Overset Grid Method. / Zahle, Frederik; Sørensen, Niels N.; Johansen, Jeppe.

    In: Wind Energy, Vol. 12, No. 6, 2009, p. 594-619.

    Publication: Research - peer-review › Journal article – Annual report year: 2009

  90. 2008
  91. Published

    Actuator disc model using a modified Rhie-Chow/SIMPLE pressure correction algorithm. Comparison with analytical solutions. / Rethore, Pierre-Elouan Mikael; Sørensen, Niels N.

    In: Conference proceedings (online). EWEA, 2008.

    Publication: Research › Article in proceedings – Annual report year: 2008

  92. Published

    Aeroelastic stability of suspension bridges using CFD. / Stærdahl, J.W.; Sørensen, Niels N.; Nielsen, S.R.K.

    In: Shell and spatial structures: Structural architecture - towards the future looking to the past. Venice : University Iuav of Venice, 2008.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2008

  93. Published

    A Stochastic Static Stall Model Applied to Wing Turbine Blade. / Bertagnolio, Franck; Rasmussen, Flemming; Madsen Aagaard, Helge; Sørensen, Niels N.; Johansen, Jeppe.

    In: Technical papers. Vol. AIAA-2008-6723 Reston, VA (US) : American Institute of Aeronautics & Astronautics, 2008.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2008

  94. Published

    Beregning af laminar / turbulent omslag i forbindelse med vindmølleaerodynamik. / Sørensen, Niels N.

    2008. Poster session presented at Forskningens dag, Aalborg (DK), Institut for byggeri og anlæg, .

    Publication: Communication › Poster – Annual report year: 2008

  95. Published

    CFD methods for wind turbine aerodynamics. / Sørensen, Niels N.

    In: Extended abstracts. ed. / T. Kvamsdal; K. Magne Mathisen; Bjørnar Pettersen. Barcelona : International Center of Numerical Methods in Engineering, 2008. p. 39-42.

    Publication: Research › Conference abstract in proceedings – Annual report year: 2008

  96. Published

    CFD modeling of laminar-turbulent transition for airfoils and rotors using the #gamma# - Re#theta# model. / Sørensen, Niels N.

    In: Scientific proceedings. Brussels : European Wind Energy Conference and Exhibition, 2008. p. 106-112.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2008

  97. Published

    CFD Modelling of Laminar-Turbulent Transition for Airfoils and Rotors. / Sørensen, Niels N.

    In: Technical papers. Vol. AIAA-2008-7323 Reston, VA (US) : American Institute of Aeronautics & Astronautics, 2008.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2008

  98. Published

    Comparison of an actuator disc model with a full rotor CFD model under uniform and shear inflow condition. / Rethore, Pierre-Elouan Mikael; Sørensen, Niels N.; Zahle, Frederik; Johansen, Jeppe.

    In: Book of abstracts. European Academy of Wind Energy, 2008. p. 123-126.

    Publication: Research › Conference abstract in proceedings – Annual report year: 2008

  99. Published

    Current aerodynamic research activities and recent results from Risø DTU. / Rasmussen, Flemming; Madsen Aagaard, Helge; Bak, Dan Christian; Sørensen, Niels N.

    In: Proceedings (on CD-ROM). AWEA, 2008.

    Publication: Research › Article in proceedings – Annual report year: 2008

  100. Published

    Increased Aerodynamic Efficiency on Wind Turbine Rotors using Winglets. / Johansen, Jeppe; Gaunaa, Mac; Sørensen, Niels N.

    In: Technical papers. Vol. AIAA-2008-6728 Reston, VA (US) : American Institute of Aeronautics & Astronautics, 2008.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2008

  101. Published

    Laminar turbulent transition using the g−Req transition model. / Sørensen, Niels N.

    In: Research in aeroelasticity EFP-2007. ed. / C. Bak. Vol. Risø-R-1649(EN) Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2008. p. 49-66 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1649(EN)).

    Publication: Research › Book chapter – Annual report year: 2008

  102. Published

    Large eddy simulations of an airfoil in turbulent inflow. / Gilling, Lasse; Sørensen, Niels N.

    In: Book of abstracts. European Academy of Wind Energy, 2008. p. 33-36.

    Publication: Research › Conference abstract in proceedings – Annual report year: 2008

  103. Published

    Les of airfoils in turbulent inflow. / Gilling, Lasse; Sørensen, Niels N.

    2008. Poster session presented at PhD seminar on wind energy in Europe, Magdeburg (DE), 1-2 Oct, .

    Publication: Research › Poster – Annual report year: 2008

  104. Published

    Modellering af laminær / turbulent transition. / Sørensen, Niels N.

    2008. Paper presented at Temamøde om aeroelasticitet - seneste resultater, Risø (DK), 14 May, .

    Publication: Research › Paper – Annual report year: 2008

  105. Published

    Optimization of Wind Turbine Operation by Use of Spinner Anemometer. / Friis Pedersen, Troels; Sørensen, Niels N.; Vita, Luca; Enevoldsen, Peder.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2008. 45 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1654(EN)).

    Publication: Research › Report – Annual report year: 2008

  106. Published

    Overset Grid Flow Simulation on a Modern Wind Turbine. / Zahle, Frederik; Sørensen, Niels N.

    In: Technical papers. Vol. AIAA-2008-6727 Reston, VA (US) : American Institute of Aeronautics & Astronautics, 2008.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2008

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