DEVELOPMENT OF A SKEW-BLADE SHAPE FOR A DUCTED CONTROLLABLE PITCH PROPELLER SYSTEM

With free-running propellers, increase of the skew has long been used successfully to minimize propeller-induced pressure fluctuations. With ducted controllable pitch propellers, this blade shape was not considered because of the variation of the gap during reverse conditions. A new design of the propeller blade for a trawler features a skew of 27.5o. Comparative tests on model propellers having in the duct conventional and skew blade shapes showed that the higher skew scarcely influences cavitation properties and that thrust and tangential force pulses on the propeller blade and the pressure fluctuations induced by the ducted propeller in free run and towed condition would decrease considerably.

  • Supplemental Notes:
    • PROPCAV '95, Intl Conf on Propeller Cavitation Research; 16- 18 May; Newcastle upon Tyne, UK. Sponsored by Univ of Newcastle upon Tyne, UK, et al. Pprs. Publ by Penshaw Press, Sunderland, UK, ISBN 0-9518806-4; p 17 [12 p, 12 ref, 4 tab, 12 fig]
  • Authors:
    • Heinke
    • H-J
    • Philipp, O
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717259
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM