This chapter is dedicated to the study of the aerodynamic performances of ice contaminated airfoils. Generalities on aerodynamics of contaminated profile are explained, looking to the effect of roughness on lift and drag, with the help of an exhaustive review and comment of the results currently available. Successively, the type of ice contamination is analysed and classified according to the major effect on boundary layer and aerodynamics. To close the substantial gap in systematic studies in the field, which lacks a general assessment of the problem, a more consistent classification of ice shapes is proposed. The effects analysed were quantitatively used to evaluate the drop of the power and thrust curve of a wind turbine operating in light icing conditions. With regard to loads, a deeper analysis of the effect of ice has been accomplished by a modification of the Flex-5 aeroelastic code. In order to solve the basic lack of realistic ice shapes and masses on the blades usually employed, the concepts of arbitrary contamination levels and ice frequency levels introduced in Chap. 2 have been used to create realistic damage scenarios of the turbine in actual icing environments.


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    Title :

    Aerodynamic Performances of Ice Contaminated Rotors


    Contributors:


    Publication date :

    2015


    Size :

    64 Seiten





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Print


    Language :

    English





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