Wind tunnel tests on an artificially roughened model of a slender ship-hull were carried out. The rough surface was made up of irregular, tightly packed sand grains and the corresponding roughness function was determined by the Liverpool pipe flow technique. A special three-hole Preston tube, suitable for the ship model, was constructed and calibrated to measure the wall friction on both rough and smooth surfaces. The results obtained were compared with those predicted by an integral method of calculation of boundary layer on rough ship hulls. In order to perceive the roughness effects on the hull surface pressure distribution, the latter was measured on the model fitted with special roughness strips distributed girthwise from the fore to the after peak. The results are compared with potential flow calculations by the Hess and Smith method.

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  • Supplemental Notes:
    • Transactions paper
  • Authors:
    • Okuno, T
    • Lewkowicz, A K
  • Publication Date: 1987

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  • Accession Number: 00656770
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM