A critical CAE analysis of the bottom shape of a multi stepped air cavity planing hull

One of the most important aspects, in the air cavity system (ACS) and multi stepped hull design, is the choice of the geometrical shape of the cavity and the steps. In this article a complete experimental and numerical campaign on a multi stepped ACS has been carried out, varying the velocity and the air flow rate under the hull. The experimental tests have been conducted in an ITTC Towing Tank allowing to validate the numerical simulations obtained by means of a CFD U-RANSe (Unesteady Reynolds Averaged Navier-Stokes equations) code. The CFD setup is described in detail. From this campaign a critical analysis of the Froude number influence on the air cushion shape has been argued. The authors identified four different behaviours, from low to very high Froude numbers. The use of CFD has allowed to observe quantities of difficult evaluation by means of traditional experimental test, as e.g. the frictional component of the resistance, the airflow path lines and the volume of fraction in transversal and longitudinal sections. The results have been discussed.

• Record URL:
  • https://doi.org/10.1016/j.apor.2018.11.003
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0141118718303948
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01411187
• Supplemental Notes:
  • © 2018 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Cucinotta, Filippo
  • Guglielmino, Eugenio
  • Sfravara, Felice
• Publication Date: 2019-1

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 130-142
• Serial:
  • Applied Ocean Research
  • Volume: 82
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0141-1187
  • Serial URL: https://www.sciencedirect.com/journal/applied-ocean-research

Subject/Index Terms

• TRT Terms: Air cushion vehicles; Computer aided design; Fluid dynamics; Froude number; Planing hulls; Reynolds number; Shape; Vehicle design
• Identifier Terms: Reynolds-Averaged Navier-Stokes Equations
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 01696167
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 26 2019 9:41AM