Generating turbulence using passive grids in wind tunnel testing

Giulio Vita, Hassan Hemida, Thomas Andrianne, Charalampos Baniotopoulos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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This paper reports on a wind tunnel experiment on a wind turbine aerofoil under turbulent inlet. Urban Wind Energy is considered as a promising way of harvesting wind energy in built areas, hence slashing infrastructural wind energy costs. Effective positioning strategies are needed to maximise the performance; however, the role of turbulent inflows is not clear. In particular, the role of turbulent length scales is difficult to assess. In this work, the DU96w180 wind turbine aerofoil is investigated regarding its aerodynamic performance under varying inflow turbulence structures. Particular attention is given to the stall mechanism, hence the angle of attack of the blade is varied accordingly "0<α<45deg" . Inlet turbulence is created by means of passive grids, with various geometrical setup, in order to obtain a wide range of turbulent structures. In order to test the effect of large scales, two chord length for the model are chosen "c=0.125÷0.025m" in order to maximise the length-to-chord ratio L/c.
Original languageEnglish
Title of host publicationProceedings of WINERCOST'17 - The International Conference on Wind Energy Harvesting 2017
EditorsC. Baniotopoulos , C. Rebelo, L. Simões da Silva, C. Borri , B. Blocken , H. Hemida , M. Veljkovic , T. Morbiato , R. P. Borg , S. Huber , E. Efthymiou
Place of PublicationCoimbra, PT
Number of pages5
ISBN (Electronic)978‐989‐99226‐5‐5
ISBN (Print)978‐989‐99226‐4‐8
Publication statusPublished - 20 Apr 2017
EventWINERCOST’17 International Conference on Wind Energy Harvesting - University of Coimbra, Coimbra, Portugal
Duration: 20 Apr 201721 Apr 2017


ConferenceWINERCOST’17 International Conference on Wind Energy Harvesting
Abbreviated titleWINERCOST’17

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Civil and Structural Engineering


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