GRID GENERATION AND FLOW COMPUTATION FOR PRACTICAL SHIP HULL FORMS AND PROPELLERS USING THE GEOMETRICAL METHOD AND THE IAF SCHEME

Grid generation for ship hulls and a propeller blade was made using the geometrical method, where an initial grid is modified iteratively for orthogonality, smoothness, and clustering. Using the generated grid, the computation of the incompressible Navier-Stokes equations was made for flows past a flat plate and four different ship hull forms using the IAF scheme and the Baldwin-Lomax zero- equation turbulence model. The hull forms chosen were a Wigley hull and Series 60 hulls. Prior to the ship flow computation, the flow around a flat plate was computed, where the agreement of the computed result with the experiment was very good in terms of the wall shear stress, displacement thickness, shape factor, and velocity distribution. The computed flow past a Wigley hull--which is not very different from the flat plate result because of its fine hull form--showed good agreement with experiments. The computed flows past Series 60 (Cb=0.6, 0.7, and 0.8) hull forms showed systematic change wih the Cb block coefficient values. The computed Cb=0.6 result showed reasonable agreement with experiments. The agreement, however, became poorer with increasing Cb values.

Media Info

  • Features: References;
  • Pagination: 15p., incl. discuss.

Subject/Index Terms

Filing Info

  • Accession Number: 00661077
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM