ENERGY SAVING DEVICE: AP-FIN (APERTURE FIN)

The energy-saving device named the AP-Fin (Aperture Fin) has been developed to improve propulsive performance by reducing the rotational energy loss behind the propeller, without impairing the effect of the optimised stern and propeller. The AP-Fin is a simple curved plate fitted to the upper part of the propeller aperture and its features are easy design and construction, low cost and wide applicability. Series model tests systematically varying skew and length of the AP-Fin were performed to study the effects on resistance, interaction, flow field and rudder force. As a result of these experiments, the power-saving effect of the AP-Fin has been confirmed to be about 4% in full load condition and approximately 2% in ballast condition for VLCC. The semicontainer ship, the first full-scale vessel adopting the AP-Fin, will be in service before the end of 1988.

• Supplemental Notes:
  • I.H.I. [Jap.] Engng. Rev., 28 (1988), p. 398 (Nov.) [6 pp., 8 ref., 3 tab., 17 fig., 1 phot.]
• Authors:
  • Koshiba, Y
  • Shirose, Y
• Publication Date: 1988

Language

• Japanese

Subject/Index Terms

• Old TRIS Terms: Fuel saving propulsive efficiency
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00695178
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM