Underwater noise measurements with a ship retrofitted with PressurePoresTM noise mitigation technology and using HyDroneTM system

Research output: Contribution to conferencePaperpeer-review

12 Downloads (Pure)

Abstract

This paper presents the sea trials results by measuring the underwater radiated noise (URN) levels of a research vessel retrofitted with the novel "PressurePoresTM" URN mitigation technology on her propellers to demonstrate the effectiveness of this technology in full-scale. Tip Vortex Cavitation (TVC) is one of the main contributors to a URN. So the strategic implementation of the PressurePoresTM is aimed to reduce the TVC and subsequent URN of ship propellers. During the sea-trials, the URN levels were measured when the vessel's propellers were in the unmodified (without PressurePores) and modified (with PressurePores) conditions, including comprehensive cavitation observations using a high-speed camera to assess PressurePoresTM technology. The trial results showed this innovative technology could mitigate the TVC and resulting URN signature by 10dB. Also, in this measurement campaign, a novel URN measurement method using an aerial drone with a miniature hydrophone called the "HyDroneTM" system was tried successfully. HyDroneTM can be a flexible and practical alternative URN measurement technique to the conventional tethered-based method to improve the undesirable background noise corrections.
Original languageEnglish
Number of pages7
Publication statusPublished - 13 May 2021
Event11th International Symposium on Cavitation - Online, Daejon, Korea, Republic of
Duration: 10 May 202113 May 2021
http://cav2021.org/

Conference

Conference11th International Symposium on Cavitation
Abbreviated titleCAV2021
Country/TerritoryKorea, Republic of
CityDaejon
Period10/05/2113/05/21
Internet address

Keywords

  • PressurePoresTM noise mitigation technology
  • full-scale Underwater Radiated Noise (URN)
  • cavitation noise mitigation
  • HyDroneTM URN measurement system

Fingerprint

Dive into the research topics of 'Underwater noise measurements with a ship retrofitted with PressurePoresTM noise mitigation technology and using HyDroneTM system'. Together they form a unique fingerprint.

Cite this