Twenty-five years ago or so, Tulin recommended that the viscous resistance of ship models be determined by means of wake-survey measurements. Such a method had been imagined by Betz for estimating the drag of wing profiles. The extension of Betz's method to three-dimensional flows required many refinements. The present paper is intended to found the theory on a firm base. Rigorous formulas have been established for deeply submerged bodies and also for surface-ship models. But, in the latter case, wake-survey measurements do not suffice; the energy lost by the wake in generating waves should also be determined. This is not yet possible. Therefore the estimates of the viscous resistance of a surface ship model are liable to a systematic error.

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  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Brard, R
  • Publication Date: 1977-9

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Filing Info

  • Accession Number: 00170533
  • Record Type: Publication
  • Source Agency: Journal of Ship Research
  • Files: TRIS
  • Created Date: Mar 7 1978 12:00AM