Calculation of Maneuvering Forces on Submersibles with Ducted Propulsors

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$49,785.00
Award Year:
1992
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
18282
Agency Tracking Number:
18282
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
4 A Street, Burlington, MA, 01803
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
David S. Greeley
(617) 273-2400
Business Contact:
() -
Research Institution:
n/a
Abstract
A method is proposed for calculating the vertical and horizontal forces and moments developed by a ducted propulsor on a submerged vehicle operating at a small angle of attack. The key element of the computational method is the development of an equivalent actuator disk representation of induced velocities, forces, and moments developed by the actual rotor in which varies with radius and position angle, reduces the actual unsteady propulsor flow to an equivalent steady flow field that can then be coupled with a steady flow analysis of the duct, submersible hull, and control surfaces in order to obtain the maneuvering forces on the entire configuration. A method is also proposed for computing the convection of the hull boundary layer due to crossflow, which generates the non-uniform inflow to a ducted propulsor during maneuvers. These two computational building blocks, to be developed during the Phase I effort, would be incorporated into a complete hydrodynamic model for maneuvering submersibles during a Phase II contract.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government