The Effect of Tip Rake on Propeller Induced Pressure Fluctuations

船尾変動圧力に及ぼすチップレーキの影響

The authors propose a practical method to estimate the reduction rate of propeller-induced pressure fluctuations due to the backward rake around the blade tip. The designed geometrical shape of propeller blades decisively affects the propeller performance and the cavitation characteristics as well. The propeller designers try to reflect positive effects of the geometrical parameters to propeller design to enhance the propeller performance and to reduce the negative effects of cavitation behavior. In the present study, the cavitation tests and the measurement of pressure fluctuations induced by the respective propellers with five kinds of backward tip rake distribution working in the wake distribution behind an inland ship are performed systematically. The effects of the backward rake distribution on the pressure fluctuation signals are clearly demonstrated. The systematic analysis of the measured pressure fluctuations derives a practical formula to estimate the reduction rate of the pressure fluctuations due to the effective backward tip rake. Finally this formula is applied to the measured results of pressure fluctuations on other backward tip raked propellers working in the wake of a large low-speed ship to confirm its effectiveness. The results show that the present simple and practical method is promising but further validation is encouraged through the practical applications.

• Record URL:
  https://doi.org/10.2534/jjasnaoe.17.9
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=The+Effect+of+Tip+Rake+on+Propeller+Induced+Pressure+Fluctuations&author=S.+Yamasaki&author=A.+Okazaki&author=T.+Mishima&author=Y.+Kawanami&author=U.+Yoshitaka&publication_year=2013
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/18803717
• Authors:
  • Yamasaki, Shosaburo
  • Okazaki, Akinori
  • Mishima, Takahiro
  • Kawanami, Yasutaka
  • Yoshitaka, Ukon
• Publication Date: 2013

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 9-17
• Serial:
  • Journal of the Japan Society of Naval Architects and Ocean Engineers
  • Volume: 17
  • 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: Cavitation (Mechanics); Pressure; Propeller blades; Propellers
• Subject Areas: Marine Transportation; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01505847
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Jan 27 2014 12:48PM