Accession Number:

ADA156242

Title:

Viscous Flow Over Ship Sterns

Descriptive Note:

Final technical rept. Oct 1980-Mar 1985

Corporate Author:

IOWA INST OF HYDRAULIC RESEARCH IOWA CITY

Personal Author(s):

Report Date:

1985-04-01

Pagination or Media Count:

17.0

Abstract:

When this research project was initiated in October 1980, it was evident that neither reliable calculation methods nor a comprehensive set of data existed for the description of the complex viscous flow over the stern and in the wake of the ship hull. The 1980 SSPA-ITTC Workshop on Ship Boundary Layers Larsson, 1981 had indicated that all available methods for the calculation of thin boundary layers broke down, for a variety of reasons, in the stern region. At about the same time, the author Patel, 1980 reviewed previous experimental investigations in wake flows for the Standard Conferences on Complex Turbulent Shear Flows and concluded that there was not a single set of reliable and detailed data for three-dimensional stern and wake flows which could be used as a test case for the assessment of calculation methods for such flows. This investigation was therefore undertaken with three specific objectives 1 To develop promising three-dimensional thin boundary-layer calculation methods for application to arbitrary ship hulls and assess their limitations 2 To develop a calculation procedure for the flow over the stern and in the wake of the ship and 3 To conduct a comprehensive, wind-tunnel experiment on a ship double-model to document, in detail, the mean flow and turbulence in the thick stern boundary layer and the near wake. Additional keywords Stern flow Turbulent flow Navier Strokes equations.

Subject Categories:

  • Numerical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE