Frederik Zahle

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  1. 2013
  2. 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

  3. 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

  4. 2012
  5. Published

    Blade element momentum modeling of inflow with shear in comparison with advanced model results. / Aagaard Madsen, Helge; Riziotis, V.; Zahle, Frederik; Hansen, Martin Otto Laver; Snel, H.; Grasso, F.; Larsen, Torben J.; Politis, E.; Rasmussen, Flemming.

    In: Wind Energy, Vol. 15, No. 1, 2012, p. 63-81.

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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. Published

    Light Rotor: The 10-MW reference wind turbine. / Bak, Christian; Bitsche, Robert; Yde, Anders; Kim, Taeseong; Hansen, Morten Hartvig; Zahle, Frederik; Gaunaa, Mac; Blasques, José Pedro Albergaria Amaral; Døssing, Mads; Wedel Heinen, Jens-Jakob ; Behrens, Tim .

    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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 2011
  20. 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

  21. Published

    Aeroelastic Optimization of MW Wind Turbines. / Hansen, Morten Hartvig; Zahle, Frederik.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2011. 144 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1803(EN)).

    Publication: Research › Report – Annual report year: 2012

  22. 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

  23. 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

  24. 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

  25. 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

  26. 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

  27. 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

  28. 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

  29. 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

  30. 2010
  31. Published

    A novel concept for floating offshor wind turbines : Recent developments in the concept and investigation on fluid intraction with the rotating foundation. / Vita, Luca; Zahle, Frederik; Schmidt Paulsen, Uwe; Friis Pedersen, Troels; Aagaard Madsen, Helge; Rasmussen, Flemming.

    In: Proceedings OMAE2010. ASME, 2010. p. 389-396.

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

  32. Published

    BEM modeling of inflow with shear in comparison with advanced model results. / Aagaard Madsen, Helge; Larsen, Torben J.; Zahle, Frederik; Riziotis, V.; Politis, E.; Hansen, Martin Otto Laver; Snel, H.; Grasso, F.

    In: Torque 2010: The science of making torque from wind. EWEA, 2010. p. 235-246.

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

  33. 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

  34. 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

  35. 2009
  36. 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

  37. 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

  38. 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

  39. 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

  40. 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

  41. 2008
  42. 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

  43. Published

    Flowinteraktion imellem rotor, tårn og nacelle med 3D CFD. / Zahle, Frederik.

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

    Publication: Research › Paper – Annual report year: 2008

  44. Published

    Latest results and future activities at Risø DTU within trailing edge flaps. / Buhl, Thomas (Author); Andersen, Peter Bjørn (Author); Gaunaa, Mac (Author); Bak, Dan Christian (Author); Madsen Aagaard, Helge (Author); Zahle, Frederik (Author); Heinz, Joachim Christian (Author); Bergami, Leonardo (Author); Na, Li (Author); Fisher, A. (Author).

    2008. IEA topical meeting 'The application of smart structures for large wind turbine rotor blades', Albuquerque (US), May, 01-01-08.

    Publication: Research › Sound/Visual production (digital) – Annual report year: 2008

  45. 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

  46. Published

    Rotor aerodynamics in atmospheric shear flow. / Zahle, Frederik; Sørensen, Niels N.

    In: Scientific proceedings. Brussels : European Wind Energy Conference and Exhibition, 2008. p. 120-124.

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

  47. Published

    The influence of wind shear and tower presence on rotor and wake aerodynamics using CFD. / Zahle, Frederik; Sørensen, Niels N.; Madsen Aagaard, Helge.

    In: Research in aeroelasticity EFP-2007. ed. / Dan Christian Bak. Vol. Risø-R-1649(EN) Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2008. p. 17-34 (Denmark. Forskningscenter Risoe. Risoe-R; No. 1649(EN)).

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

  48. Published

    Vinger med flapper: Hvor tæt er vi på at kunne efterligne fuglens vinger?. / Andersen, Peter Bjørn; Buhl, Thomas; Gaunaa, Mac; Madsen Aagaard, Helge; Bak, Dan Christian; Zahle, Frederik; Heinz, Joachim Christian; Bergami, Leonardo; Na, Li.

    2008. Abstract from Dansk Vindkraftkonference 2008, Nyborg, Denmark.

    Publication: Research › Conference abstract for conference – Annual report year: 2008

  49. 2007
  50. Published

    On the influence of far-wake resolution on wind turbine flow simulations. / Zahle, Frederik; Sørensen, Niels N.

    In: J. Phys.: Conf. Ser., Vol. 75, 2007, p. 9.

    Publication: Research - peer-review › Conference article – Annual report year: 2007

  51. Published

    Wind turbine aerodynamics using an incompressible overset grid method. / Zahle, Frederik (Invited author); Johansen, Jeppe (Invited author); Sørensen, Niels N. (Invited author).

    In: Scientific proceedings. Brussels : EWEA, 2007. p. 9-19.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2007

  52. Published

    Wind turbine aerodynamics using CFD. / Johansen, Jeppe; Zahle, Frederik; Bertagnolio, Franck; Sørensen, Niels N.

    2007. Poster session presented at Internal DTU conference on future energy research at the Technical University of Denmark, Roskilde, Denmark.

    Publication: Research › Poster – Annual report year: 2007

  53. Published

    Wind turbine hydrodynamics using CFD. / Zahle, Frederik.

    In: Windtech Int., Vol. 3, No. 8, 2007, p. vp.

    Publication: Communication › Journal article – Annual report year: 2007

  54. Published

    Wind turbine rotor-tower interaction using an incompressible overset grid method. / Zahle, Frederik; Johansen, Jeppe; Sørensen, Niels N.; Graham, J.M.R.

    In: [Technical papers] presented at the 42. AIAA aerospace sciences meeting and exhibit. Reston, VA : American Institute of Aeronautics and Astronautics, 2007. (AIAA-2007-0425).

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2007

  55. 2006
  56. Published

    Bladtårn interaktion. / Zahle, F.

    2006. Abstract from Vinddag 2006, Dansk Forskningskonsortium for Vindenergi, Risø (DK), 21 Nov, .

    Publication: Research › Conference abstract for conference – Annual report year: 2006

  57. Published

    Rotor tower interaction using an incompressible overset grid method. / Zahle, F.; Sørensen, Niels N.; Johansen, J.; Graham, J.M.R.

    2006. Abstract from IEA Annex XI/XX joint meeting, Kiel, Germany.

    Publication: Research › Conference abstract for conference – Annual report year: 2006

  58. Published

    Wind turbine aerodynamics using an incompressible overset grid method. / Zahle, Frederik.

    2006. 149 p.

    Publication: Research › Ph.d. thesis – Annual report year: 2007

  59. Published

    Wind turbine aerodynamics using an incompressible overset grid method. / Zahle, F.

    2006. Abstract from 2nd PhD Seminar on Wind Energy in Europe, Risø, Denmark.

    Publication: Research › Conference abstract for conference – Annual report year: 2006

  60. 2004
  61. Published

    A computational comparison of standard and pneumatic Gurney flaps using CFD. / Trevelyan, C.; Zahle, F.; Michelsen, J.A.; Sørensen, Niels N.; Infield, D.G.

    In: Scientific proceedings. London : European Wind Energy Association, 2004. p. 112-116.

    Publication: Research › Article in proceedings – Annual report year: 2004

  62. Published

    Computational study of the Risø B1-24 wind turbine profile fitted with Gurney flaps. / Zahle, F.; Sørensen, Niels N.; Graham, J.M.R.

    In: Proceedings. Delft : Delft University of Technology, 2004. p. 25-36.

    Publication: Research - peer-review › Article in proceedings – Annual report year: 2004

  63. Published

    KNOW-BLADE Task-2 report: Aerodynamic accessories. / Johansen, J.; Sørensen, Niels N.; Zahle, Frederik; Kang, S.; Nikolaou, I.; Politis, E.S.; Chaviaropoulos, P.K.; Ekaterinaris, J.

    2004. 33 p. (Risø-R-1482(EN)).

    Publication: Research › Report – Annual report year: 2004

  64. 2002
  65. Published

    CFD study of a NACA 63-415 aerofoil fitted with stall strips. / Zahle, F.; Sørensen, Niels N.; Johansen, Jeppe.

    2002. 51 p. (Risø-R-1370(EN)).

    Publication: Research › Report – Annual report year: 2002

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