Distributed boundary-layer suction has numerically and experimentally shown great potential to reduce flow-induced trailing-edge noise. The paper aims at the transfer of this potential to an industrial full-size wind turbine by means of a dedicated suction system design and, hence, is meant to point out whether the predicted, airfoil-related improvements carry over to wind turbines represented by the N117, not hitherto in liaison with active flow control. Guidance is given through the different design steps involving the suction-followed blowing of the fluid and being continually dictated by industrial constraints and requirements. Because the processes of trailing-edge noise reduction and effective power alteration are intimately bound together, great emphasis is put on an accurate prediction of pump power requirement, with the latter being based on a detailed suction hardware system implying pressure losses across each component. Exploiting the limited installation space, a total trailing-edge noise reduction of 3.6 dB is coupled with a net enhancement of total rotor power of 4.75%. As of a cross-over noise reduction level of 5 dB, the enhancement of aerodynamic power no longer compensates for the pump power requirement and, hence, aeroacoustic demands are implemented to the detriment of aerodynamic performance.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Wind-Turbine Trailing-Edge Noise Reduction by Means of Boundary-Layer Suction


    Contributors:
    Arnold, B. (author) / Lutz, T. (author) / Krämer, E. (author) / Rautmann, C. (author)

    Published in:

    AIAA Journal ; 56 , 5 ; 1843-1854


    Publication date :

    2018-02-15


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Design of a Boundary-Layer Suction System for Trailing-Edge Noise Reduction of an Industrial Wind Turbine

    Arnold, Benjamin / Rautmann, Christof / Lutz, Thorsten et al. | AIAA | 2017


    Airfoil Trailing-edge Noise Reduction using Flow Suction

    Cesar, Luana M. / Kamliya Jawahar, Hasan / Azarpeyvand, Mahdi | AIAA | 2018



    On the Effect of Boundary Layer Suction on the Boundary Layer State at the Trailing-Edge and Noise Reduction

    Arnold, B. / Lutz, T. / Kramer, E. et al. | British Library Conference Proceedings | 2014


    Uniform Suction for the Reduction of the Trailing-Edge Noise

    Szoke , Máté / Fiscaletti, Daniele / Azarpeyvand, Mahdi | AIAA | 2019