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.


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    Title :

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


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


    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




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    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

    Free access

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