Study on Improvement of Measuring Accuracy of Ship’s Speed through Water

対水船速の計測精度向上に関する研究

The flow under bow bottom of ships was calculated using CFD methods and characteristics of flow-speed distribution were analysed. In the study, it was confirmed that flow speed under the bow bottom of a ship changes according to water depth by disturbance of the sailing ship and a range of the field where the disturbance effects depends on types of ships, draft and ship speed. In this report, a developed measuring system named "multi-layered relative velocity meter" is introduced to measure distributions of relative flow speed along water depth. After testing a function of the measuring system on a test boat, the measuring system was installed on a PCC and the relative flow speed at each layer was measured during a voyage. The obtained data were evaluated by comparing with the result of CFD analysis and it was confirmed that relative flow speed measured on the PCC had a similar distribution with the result of CFD analysis. Considering both the CFD analysis result and the onboard measured data, finally a new method to improve measurement accuracy of ship's speed through water is proposed.

• Record URL:
  https://doi.org/10.2534/jjasnaoe.24.39
• Record URL:
  http://scholar.google.com/scholar_lookup?title=Study%20on%20Improvement%20of%20Measuring%20Accuracy%20of%20Ship%E2%80%99s%20Speed%20through%20Water&author=Y.%20Sudo&author=K.%20Sugita&author=H.%20Ando&author=M.%20Tanigawa&author=M.%20Mushiake&author=S.%20Kawanami&author=T.%20Hino&publication_year=2016
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/18803717
• Authors:
  • Sudo, Yasuhiro
  • Sugita, Koji
  • Ando, Hideyuki
  • Tanigawa, Masahiko
  • Mushiake, Masahiko
  • Kawanami, Satoshi
  • Hino, Takanori
• Publication Date: 2016

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 39-49
• Serial:
  • Journal of the Japan Society of Naval Architects and Ocean Engineers
  • Volume: 24
  • Issue Number: 0
  • Publisher: Japan Society of Naval Architects and Ocean Engineers
  • ISSN: 1880-3717
  • EISSN: 1881-1760
  • Serial URL: https://www.jstage.jst.go.jp/browse/jjasnaoe/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Accuracy; Bows; Flow measurement; Fluid dynamics; Ships; Speed; Velocity measurement
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 01633351
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Apr 28 2017 10:42AM