APPLICATION OF NUMERICAL LIFTING SURFACE THEORY ON STEADY PERFORMANCE OF PROPELLER/DUCT SYSTEM

Application of discrete vortex elements for numerical calculations on a propeller/duct system is presented. The flexibility and reliability of the computed results by the method is discussed in comparison with the other methods and experiments. The following items are investigated in this paper: i) The possibilities of correct modelling on propeller/duct geometry and real physical phenomena; ii) The two kinds of interaction model between propeller and duct; a complete lifting surface (direct interaction model) and an infinite number of blades (indirect interaction model) in place of the propeller toward the duct lifting surface; iii) The correlations between measured and calculated circulation, pressure and open water characteristics on propeller/duct systems; iv) The influence of relative positions between propeller and duct on duct thrust components and circulation distribution. The advantages of the direct interaction model have been obtained on saving computer time with reasonable accuracy for propeller/duct performance and circulation distribution on a blade. On the other hand, the indirect interaction method has become known to be useful to obtain the good agreement with experiments on pressure distribution on duct surface.

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  • Corporate Authors:

    Society of Naval Architects of Japan

    23 Shiba-kotohiracho, Minato-ku
    Tokyo 135,   Japan 

    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 
  • Authors:
    • Yuasa, H
  • Publication Date: 1980-6

Language

  • Japanese

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Filing Info

  • Accession Number: 00319521
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 8 1980 12:00AM