Abstract
Underwater radiated noise (URN) is a compressible pressure component that propagates in the far-field from sources. Therefore, compressible pressure separation is required as a first step in developing a far-field URN monitoring technique based on hull surface pressure. In this study, a numerical method of decomposing surface total pressure induced by an underwater propeller into compressible and incompressible pressure was proposed using wavenumber-frequency transformation (WFT). First, a compressible multiphase Delayed Detached Eddy Simulation (DDES) of the hydrodynamic flow field was computed. Acoustic pressure caused by cavitation from the underwater propeller was predicted using the Ffowcs Williams–Hawkings (FW–H) integral equation and compared with the measured data to validate the numerical simulation. Finally, the compressible pressure was extracted from the total surface pressure on the stern part by using the WFT decomposition technique. In the high-frequency range, the compressible pressure appeared to be relatively high compared to the incompressible pressure in this study.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Transactions of the Korean Society for Noise and Vibration Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
