Calculation of Maneuvering Forces on Submersibles with Ducted Propulsors

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 18282
Amount: $49,785.00
Phase: Phase I
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Atlantic Applied Research
4 A Street, Burlington, MA, 01803
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David S. Greeley
 (617) 273-2400
Business Contact
Phone: () -
Research Institution
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

US Flag An Official Website of the United States Government