Simulation of Surface Ship Dynamics Using Unsteady RANS Codes
Abstract
This paper presents progress in a three-year Challenge Project, begun in 2001 and led by the Office of Naval Research (ONR), with the objective of demonstrating a capability to simulate time-dependent six-degree-of-freedom (6-DOF) motions of ships in waves and the associated near-field flow using unsteady Reynolds-Averaged Navier-Stokes (RANS) codes. Challenge Projects are sponsored by the U.S. Department of Defense's (DoD) High Performance Computing Modernization Program (HPCMP) Office. Two unsteady RANS codes are used in a progression of building-block simulations at both model and full scale and for practical configurations including detailed resolution of propulsors and appendages. The RANS codes are UNCLE, developed at the Mississippi State University (MSU), and CFDSHIP-IOWA, developed at the University of Iowa. The team members for this project are K.-H. Kim (ONR, team leader), R. Miller and J. Gorski (Naval Surface Warfare Center, Carderock Division), R. Wilson and F. Stern (University of Iowa), L. Taylor (MSU), and M. Hyman (Naval Surface Warfare Center, Coastal Systems Station). Computations are presented for increasingly complex bodies. Bilge-keel forces on a three-dimensional rolling cylinder were accurately predicted. Detailed flow and force characteristics were calculated for an unappended naval combatant hull in prescribed pitch and heave. Initial calculations for a fully appended combatant hull gave good qualitative predictions for surface pressure and free-surface elevation. Calculations for a rudder-induced turn led to evaluation of improved methods for representing a free surface.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2003
- Accession Number
- ADP014174
Entities
People
- Ki-han Kim
Organizations
- Office of Naval Research