HYDRODYNAMIC SIMULATION OF A PASSIVE BLADE CONTROL FOR TIP VORTEX CAVITATION CONTROL

A passive blade control (PBC) concept is being investigated to delay tip vortex cavitation inception for foil or marine propeller. The basic idea of PBC is to make use of elastic coupling properties of composite material system in manipulating blade tip shape when the foil or propeller is subjected to off design condition. This paper demonstrates the practical use of an unsteady potential flow based panel code in simulating the hydrodynamic performance of a flexible foil. The panel code is used as part of a multi-disciplinary design optimization of a flexible propeller. An elliptical planform foil of aspect ratio 2.55 with NACA-66 thickness distribution and NACA a=0.8 meanline distribution is used for the simulation. The PBC foil is simulated to undergo a twisting schedule so that the effective angle of attack at the tip is zero when the foil itself is subjected to a 8o geometric angle of attack. Preliminary results indicate that the PBC concept is a viable method in delaying tip vortex cavitation inception.

  • 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 29 [15 p, 3 ref, 3 tab, 9 fig]
  • Authors:
    • Dai, C
    • Fraser, J
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717260
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM