The High Speed Sea Lift (HSSL) Ships Challenge Effort

This paper summarizes the efforts carried out over the last three years for the prediction of high-speed sealift (HSSL) ships. Semi-planing monohulls, catamarans, trimarans, and small waterplane area twin hull (SWATH) concepts are some of the hull forms that were considered. Propulsor options for these configurations varied from traditional propellers mounted on shafts and struts to waterjet propulsion systems. Computational tools are needed to predict the hydrodynamics of these multihull configurations for their proper design and analysis in many areas including resistance and powering, maneuvering and seakeeping. The focus of the present effort is to use an Unsteady Reynolds averaged Navier-Stokes (URANS) solver, CFDShip-Iowa, to predict the flow fields. Many of these predictions are very computationally intensive and thus require high performance computing resources. This paper will discuss the progress made in the overall effort along with some of the validations performed.