Lee, TaegooTaegooLeeAhn Byoung-kwonLee, KyoungjunKyoungjunLeeLee, YoungchulYoungchulLee2024-04-112024-04-112024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46509This research reviewed the appropriate noise scaling method especially applied to merchant ships under operating conditions with an isolated tip vortex cavitation. The relation between the cavitation number and the radius of the tip vortex cavitation has been derived using the empirical vortex flow model. Two methods were presented to scale the noise source level generated by the propeller rotation. The first one is to perform the model test under the corresponding cavitation number to generate the same non-dimensional tip vortex cavity radius as that of a fullscale propeller. The scaling exponent to decide an equivalent cavitation number has been also introduced. Another is to scale the frequency and the noise source level considering the difference of the non-dimensional tip vortex cavity radius between a model and a full-scale propeller. The proposed methodology was applied to several cases of previous research and full-scale measurement data of Samsung Heavy Industries and showed acceptable results in noise level prediction. A guideline for choosing model test conditions and related scaling procedures to apply to various cases of ship operation considering the underwater radiated noise control was presented.enhttp://rightsstatements.org/vocab/InC/1.0/Marine propellerTip vortex cavitationUnderwater radiated noiseEngineering and Applied OperationsConference Paper10.15480/882.937210.15480/882.937210.15480/882.9294Conference Paper