Recent research has shown that quadrupole noise has a significant influence on the overall characteristics of flow-induced noise and on the performance of underwater appendages such as sonar domes. However, advanced research generally uses the Ffowcs Williams–Hawkings analogy without considering the quadrupole source to reduce computational cost. In this study, flow-induced noise is predicted by using an LES turbulence model and a developed formulation, called the formulation Q1As method to properly take into account the quadrupole source. The noise around a circular cylinder in an underwater environment is examined for two cases with different velocities. The results from the method are compared to those obtained from the experiments and the permeable FW–H method. The results are in good agreement with the experimental data, with a difference of less than 1 dB, which indicates that the formulation Q1As method is suitable for use in predicting quadrupole noise around underwater appendages.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Development of formulation Q1As method for quadrupole noise prediction around a submerged cylinder


    Beteiligte:
    Yo-Seb Choi (Autor:in) / Woen-Sug Choi (Autor:in) / Suk-Yoon Hong (Autor:in) / Jee-Hun Song (Autor:in) / Hyun-Wung Kwon (Autor:in) / Han-Shin Seol (Autor:in) / Chul-Min Jung (Autor:in)


    Erscheinungsdatum :

    2017




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    Turbulence-induced noise of a submerged cylinder using a permeable FW–H method

    Woen-Sug Choi / Yoseb Choi / Suk-Yoon Hong et al. | DOAJ | 2016

    Freier Zugriff

    Prediction of viscous flow around a fully submerged appended body

    Markatos, N.C.G. / Wills, C.B. | Tema Archiv | 1981



    A Numerical Method for the Prediction of Quadrupole Shock Wave Noise

    Di Francescantonio, P. / Deutsche Gesellschaft fur Luft- und Raumfahrt e.V. / AIAA | British Library Conference Proceedings | 1992