Navy SBIR Award

Government POC
Dr. Paul Rispin
Email: rispinp@onr.navy.mil
Phone: (703)696-0339
Fax: (703)696-0001

 

Principal Investigator
Dr. Jin-Keun Choi
Email: jkchoi@dynaflow-inc.com
Phone: (301)604-3688
Fax: (301)604-3689

Corporate Official
Dr. Georges Chahine
Email: glchahine@dynaflow-inc.com
Phone: (301)604-3688
Fax: (301)604-3689

Firm
Dynaflow, Inc.
10621-J Iron Bridge Rd.
Jessup, Maryland 20794-9381
http://www.dynaflow-inc.com

 

Contract #

N00014-03-M-0394 

Topic

N03-124 

Solicitation

03.1 

SYSCOM

ONR 

Award Amount

99944.00 

Phase

I 

Program

Navy SBIR 

Start / End Date

09/04/2003 - 03/04/2004 

FY Reported

2003 

Title

Design Trade-off Analysis for High Performance Ship Hull with Air Plenums 

Abstract

Multi-hull designs with captured air plenums have potential benefits in reduced resistance, better shock mitigation, and improved seakeeping performance. We propose to extend our proprietary CFD software, 3DYNAFS©, to the study of complex ship hulls with air plenums. 3DYNAFS© has been very successful in many unsteady free surface problems such as simulations of ship generated waves, wave-ship interactions on beaches, cavitation on propeller blades and hydrofoils, bubble behaviors in vortex flows, and underwater explosion bubbles and their interaction with nearby structures. This 3-D non-linear Boundary Element Method code has the advantage that it is coupled with an Unsteady Reynolds-Averaged Navier-Stokes equation solver. The coupled 3DYNAFS© will be used to study the conditions necessary to generate a stable air cavity, while the stand alone 3DYNAFS© will be used in the initial study on hull form parameters. The code will enable us to understand the fundamental hydrodynamics of the hull form, including the ventilated cavity behaviors, the effect of cavity on the ship generated waves, wave-making and total resistance, and the optimum geometry of the air cavity boundary. We will perform a trade-off analysis among combinations of the hull form parameters by comparing hydrodynamic pros and cons of various designs. 

Benefit

The developed code will be a useful tool to design complex hull forms including air plenums. These hull forms are expected to have wide applications in the naval and commercial sectors. The technology is potentially applicable to any fast ships such as small boats, cruisers, and possibly containers. 

Taxonomy

 

Keywords

Seakeeping, efficient hull, Ventilated cavity, wave-making resistance, high-speed, CFD, hull design, multi-hull technology