On the Influence of Cavitation Volume Variations on Propeller Broadband Noise

Low-frequency broadband shipping noise causes a growing concern for marine fauna together with the demand for noise reduction. Detailed analyses of the cavitation behaviour in the time domain serve as a prerequisite for steps toward quieter propellers. Underwater noise measurement data from the prop...

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Bibliographic Details
Published in:Journal of marine science and engineering 2022-12, Vol.10 (12), p.1946
Main Authors: Föhring, Leonie S., Juhl, Peter Møller, Wittekind, Dietrich
Format: Article
Language:English
Subjects:
Broadband
broadband propeller noise
Cavitation
cavitation noise
Container ships
Marine animals
Marine fauna
Monte Carlo method
Monte Carlo simulation
Noise control
Noise generation
Noise measurement
Noise reduction
Noise spectra
Polynomials
Propellers
sheet cavitation
Shipping
Shipping noise
Statistical methods
Stochasticity
Underwater noise
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Summary:Low-frequency broadband shipping noise causes a growing concern for marine fauna together with the demand for noise reduction. Detailed analyses of the cavitation behaviour in the time domain serve as a prerequisite for steps toward quieter propellers. Underwater noise measurement data from the propeller of a full-scale container vessel are used for the analysis of the cavitation volume behaviour. Sequencing methods, polynomial models, and stochastic evaluation methods feeding Monte Carlo simulations of unsteady sheet cavitation are applied to identify the cause of an often observed, yet unexplained similarity in shipping noise spectra. Characteristic features of the volume evolution are identified to enhance the understanding of noise generation by sheet cavitation.
ISSN:2077-1312
2077-1312
DOI:10.3390/jmse10121946