This document specifies a model test method for propeller cavitation noise evaluation in ship design.
The procedure comprises reproduction of noise source, noise measurements, post processing and scaling. The target noise source is propeller cavitation. Thus, this document describes the test set-up and conditions to reproduce the cavitation patterns of the ship based on the similarity laws between the model and the ship. The propeller noise is measured at three stages. The measurement targets for each stage are propeller cavitation noise, background noise, and transmission loss. For the source level evaluations, corrections for the background noise and the transmission loss are applied to the measured propeller cavitation noise. Finally, the full-scale source levels are estimated from the model scale results using a scaling law.st edition 2018-03 Ships and marine technology — Model test method for propeller cavitation noise evaluation in ship design — Part 1: Source level estimation Navires et technologie maritime — Méthode d'essai sur modèle pour évaluer le bruit de cavitation des hélices dans la conception des navires — Partie 1: Estimation du niveau d'émission de la source Reference number ISO 20233-1:2018(E) ？ ISO 2018 ISO 20233-1: