COMPUTATIONAL APPROXIMATIONS FOR DUCTED PROPELLERS

In this paper, the authors present and demonstrate several computational approximations for ducted propellers that lead to greatly reduced computational burdens for ducted propeller design and analysis. The first is a 'computational band' attached to the propeller tips (suitable for small tip gaps) that spreads out the blade tip vortex and models the local interaction between the duct and the blade tips in a very general way. This has been implemented for both steady and unsteady flow. The second computational approximation is the use of circular harmonic influence functions for computing the duct flow, which can be used for circular ducts in both axisymmetric and non-axisymmetric flow. These computational approximations are demonstrated for ducted propeller design, steady ducted propeller analysis, and computing the time-averaged forces generated by ducted propellers during vehicle manoeuvres (which involve unsteady propeller flows).

  • Supplemental Notes:
    • Propellers/Shafting '94 Symposium; 20-21 Sept 1994; Virginia Beach, VA, USA. Sponsored and Publ by SNAME, USA. Pprs. Ppr no 8 [18 p, 16 ref, 33 fig]
  • Authors:
    • Brown, J B
    • Greeley, D S
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717700
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM