Unsteady Velocity Decomposition for Hydrodynamic Assessment of Advanced Naval Vessels
Abstract
The future Navy will certainly include a broad range of ship types, including multihulls,surface-effect ships, hydrofoil-assisted vessels, together with more traditional aircraftcarriers and other monohulls. The design of the next generation vessels will require theneed to accurately assess the performance in normal as well as extreme conditions.Furthermore, the relative performance between the broad range of ship types must bedetermined at the earliest stages of analysis of alternatives.Many of the vessel types may be limited by the sea conditions, as this is already the casefor several existing class of ship. While it is preferred to have a ship that can operatewithout sea condition limitation, it is recognized that the design of a ship that can performin all conditions must compromise its performance relative to a ship that can performwell for a subset of conditions but perform more poorly for others.Furthermore, the vessels of the future must be balanced to have high fuel efficiency sothat the fuel weight is minimum for a given operating range. The topic of fuel efficiencyalso has important implications for the transit speed and operating costs. It will benecessary to design ships that can perform their mission while consuming a minimumquantity of fuel.This work is focused on combining the potential-flow based methods together with fieldmeth- ods to achieve the best of both worlds. Previous work has been done using theframework of velocity decomposition to achieve domain reduction that is necessary forthe field method, while computing a viscous potential solution that is valid outside of therotational region. The theoretical work in this proposal will be useful for the analysis anddiscovery of the hydrodynamic processes that govern the performance of the broadestrange of ship type. Furthermore the proposed work is applicable to all hydrodynamicperformances, for example calm-water performance, design loads in extreme seas,coupled fluid-structure interaction in slamming, et cetera.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 30, 2016
- Source ID
- N000141612971
Entities
People
- Kevin J. Maki
Organizations
- Board of Regents of the University of Michigan
- Office of Naval Research
- United States Navy