The problem of quadrupole noise prediction is addressed and treated through the acoustic analogy approach, comparing different solution forms for the FW-H equation including the nonlinear source term. In particular, results obtained using the volume integration of the quadrupole source are presented. A comparison is established with results from a set of acoustic Euler calculations; a comparative analysis of the computing time is conducted, and methods to reduce the computational effort requested by the volume integration are proposed. Then, a particular description of quadrupole source term is introduced, giving rise to some surface integrals. Their role is investigated in order to asses how they affects the quadrupole noise calculation.


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    Title :

    Calculation of high-speed noise from helicopter rotor using different descriptions of quadrupole source


    Additional title:

    Die Berechnung des Lärms, hervorgerufen durch ein Hubschrauberrotorblatt bei Hochdrehzahl, mittels verschiedener Beschreibungen von Quadrupolquellen


    Contributors:


    Publication date :

    1995


    Size :

    7 Seiten, 11 Bilder, 14 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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