Simulation based design optimization of waterjet propelled Delft catamaran

The present work focuses on the application of simulation-based design for the resistance optimization of waterjet propelled Delft catamaran, using integrated computational and experimental fluid dynamics. A variable physics/variable fidelity approach was implemented wherein the objective function was evaluated using both low fidelity potential flow solvers with a simplified Computational Fluid Dynamics (CFD) waterjet model and high fidelity Reynolds-Averaged Navier–Stokes (RANS) solvers with discretized duct flow calculations. Both solvers were verified and validated with data for the original hull. The particle swarm optimizer was used for single speed optimization at Fr=0.5, and genetic algorithms were used for multi speed optimization at Fr=0.3, 0.5 and 0.7. The variable physics/variable fidelity approach was compared with high fidelity approach for the bare-hull shape optimization and it showed an overall central processing unit (CPU) time reduction of 54% and converged to the same optimal design at Fr=0.5. The multi-speed optimization showed design improvement at Fr=0.5 and 0.7, but not at Fr=0.3 since the design variables were obtained based on sensitivity analysis at Fr=0.5. High fidelity simulation results for the optimized barehull geometry indicated 4% reduction in resistance and the optimized waterjet equipped geometry indicated 11% reduction in effective pump power required at self-propulsion. Verification was performed for the optimized hull form and its reduction in powering will be validated in forthcoming experimental campaign.

• Record URL:
  https://doi.org/10.3233/ISP-130098
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0020868X
• Supplemental Notes:
  • ©2012 IOS Press and the authors. All rights reserved.
• Authors:
  • Kandasamy, Manivannan
  • Peri, Daniele
  • Tahara, Yusuke
  • Wilson, Wesley
  • Miozzi, Massimo
  • Georgiev, Svetlozar
  • Milanov, Evgeni
  • Campana, Emilio F
  • Stern, Frederick
• Publication Date: 2013

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 277-308
• Serial:
  • International Shipbuilding Progress
  • Volume: 60
  • Issue Number: 1-4
  • Publisher: IOS Press
  • ISSN: 0020-868X
  • Serial URL: http://www.iospress.nl/journal/international-shipbuilding-progress/

Subject/Index Terms

• TRT Terms: Algorithms; Design; Fluid dynamics; Hulls; Hydrodynamics; Optimization; Simulation; Waterjet propelled craft; Waterjets
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01487834
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 23 2013 11:40AM