Gas Entrapment in pipelines is often detrimental to a pump startup where extreme damage could occur with plant shutdown potential. Use of a ultrasonic normal beam sensor is difficult to use because of heights, elbows, insulation, and time to do the tests. As a consequence, an ultrasonic guided wave technique has been developed to estimate gas entrapment volumes in a pipeline. Selection of a proper mode and frequency along with appropriate feature selection can lead to an attractive solution to this problem. It has been shown that the use of guided waves and the virtually infinite number of wave structures that they can support can be effectively applied to the gas entrapment detection problem. The key concept is the propagation of both in-plane and out-of-plane [Leaky] modes. The in-plane component for long range energy transport [penetration] and the out-of-plane component for energy absorption by the liquid contain within a pipe.


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    Title :

    Ultrasonic guided waves for gas entrapment detection in pipelines


    Additional title:

    Geführte Ultraschallwellen zum Nachweis von Gasansammlungen in Pipelines


    Contributors:
    Rose, J.L. (author) / Royer, R.L. jun. (author) / Avioli, M.J. (author) / Camilli, N. (author)


    Publication date :

    2009


    Size :

    6 Seiten, 7 Bilder


    Remarks:

    (nicht paginiert)



    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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