Prediction of the hydroacoustic emissions of a twin-screw vessel considering the phase angle of the propellers

The propulsion system radiates a substantial fraction of the total sound energy, especially if sheet or vortex cavitation occurs. In this paper, a boundary element method is applied to investigate the sound propagation into the far field of a twin-screw vessel. It focuses on the effect of phase angle between the propellers on the sound levels. The flow simulations are conducted using a first order panel method to model the flow around the after ship. In addition, the Ffowcs Williams-Hawkings equation is used to predict the sound propagated into the far field. Sound levels in the far field as well as at distinct observation points are evaluated to gain an understanding of the mechanism.

Schlagworte

Underwater radiated noise (URN)

boundary element method (BEM)

Ffowcs Williams-Hawkings method (FWH)

propeller cavitation

DDC Class

620: Engineering

Publication version

publishedVersion

Lizenz

http://rightsstatements.org/vocab/InC/1.0/

Name

Scharf-PredictionOfTheHydroacousticEmissionsOfATwinscrewVesselConsideri-1137-1-final.pdf

Type

main article

Size

10.12 MB

Format

Adobe PDF

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Prediction of the hydroacoustic emissions of a twin-screw vessel considering the phase angle of the propellers