Date of Award

2007

Degree Type

Thesis

Degree Name

Master of Science in Ocean Engineering

Department

Ocean Engineering

First Advisor

Stéphan T. Grilli

Abstract

Calm water towing tank results completed in August 2002 for a 2.3 m Harley surface effect ship model, a seal-less, twin air cushion, catamaran design, are presented. Results are extrapolated to 25 and 100 m length scales. Separately, a boundary integral method is used to solve for fully nonlinear potential flow wave resistance of moving pressure patches. The resulting algebraic system is solved using a restarted version of GMRES combined with a fast multipole algorithm. The Dirichlet-Neumann boundary value problem is solved at each time step using a second-order Taylor series approximation of a mixed Eulerian-Lagrangian time integration. Twin pressure patches are used to approximate the Harley surface effect ship, and comparison with towing tank resistance tests are presented. The wetted surface area and wave resistance for each case are compared to experimentally estimated values.

Share

COinS