Multiphase Flow Simulation of ITTC Standard Cavitator for Underwater Radiated Noise Prediction

Antti Hynninen*, Ville Viitanen, Jukka Tanttari, Rhena Klose, Claudio Testa, Jussi Martio

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    3 Citations (Scopus)
    82 Downloads (Pure)

    Abstract

    This work focuses on the main issues related to noise measurements in cavitation tunnels. The scope of the paper is to twofold: to obtain a better understanding on the main phenomena underlying experiments and to define consistent cavitation tunnel measurement corrections for background noise, wall reflections, and distance normalisation. To this aim, the acoustic field generated by the ITTC standard cavitator model inside a cavitation tunnel is predicted by Lighthill’s acoustic analogy and solved through a finite element method that inherently accounts for the presence of the walls. Sources of sound detection relies on two multiphase CFD solvers, namely, the homogeneous mixture model—Volume of Fluid method and the Euler–Euler formulations. Starting from the computation of the sound pressure level in the free field with the assumption of spherical spreading without absorption, corrections from losses and spreading are detected by the above approach. Background-corrected sound pressure levels are identified and then compared with the source levels measured in the cavitation tunnel of the Potsdam Model Basin (SVA). It is found that free-field computations corrected by tunnel-induced effects match well with experiments up to 100 Hz (in the one-third octave band), whereas relevant discrepancies arise out of this range that need further investigations.
    Original languageEnglish
    Article number820
    Number of pages29
    JournalJournal of Marine Science and Engineering
    Volume11
    Issue number4
    DOIs
    Publication statusPublished - Apr 2023
    MoE publication typeA1 Journal article-refereed

    Funding

    This research was funded by the VTT Technical Research Centre of Finland Ltd. and Business Finland as part of the ModProp project.

    Keywords

    • cavitation tunnel experiments
    • cavitator
    • hydroacoustics
    • multiphase flow simulations
    • underwater radiated noise
    • vibroacoustics

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