In order to study the effects of coastline on wave power absorption, we describe here a linearized theory of an OWC (oscillating water column) installed on a straight coast. The sea depth is assumed to be constant and the coast is a vertical cliff. The column is a vertical circular cylinder half embedded in the cliff and open on the seaside. Forced by incident waves from any direction, the water surface inside pushes the dry air above through a Wells turbine system to generate power. Carrying out the linearized theories of radiation and diffraction analytically, we calculate the coefficients of apparent mass and radiation damping, and the chamber pressure. Optimum absorption efficiency is examined under the constraint of constant chamber volume. Results are compared with a parallel study of an OWC installed either offshore or at the tip of a thin breakwater.


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    Title :

    Wave power extraction from an oscillating water column along a straight coast


    Additional title:

    Wellenenergie-Extraktion aus einer schwingenden Wassersäule entlang einer geraden Küste


    Contributors:

    Published in:

    Ocean Engineering ; 36 , 6-7 ; 426-433


    Publication date :

    2009


    Size :

    8 Seiten, 14 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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