STEADY AND UNSTEADY LOADINGS AND HYDRODYNAMIC FORCES ON COUNTERROTATING PROPELLERS
The linearized lifting surface theory has been applied to the evaluation of blade loadings and resultant hydrodynamic forces and moments (thrust, torque, bearing forces and bending moments) of counterrotating propeller systems with equal and unequal number of blades operating in uniform and nonuniform inflow fields, both units rotating with the same RPM. The mathematical model takes into account as realistically as possible the geometry of the propulsive device, the mutual interaction of both units and the three-dimensional spatially varying inflow field. A computer program has been developed adaptable to high-speed digital computers (CDC 6600 - 7600) for counterrotating propulsion systems of equal and unequal blade number in uniform inflow for comparison with experimental results if available. (Author)
- Supersedes report dated Apr 76, AD-A027 182.
Stevens Institute of TechnologyDavidson Laboratory, Castle Point Station
Hoboken, NJ USA 07030
- TSAKONAS, S
- Jacobs, W
- Ali, M
- Publication Date: 1976-7
- Pagination: 22 p.
- TRT Terms: Aerodynamic lift; Bending moments; Blade loading; Contrarotating propellers; Digital computers; Hydrodynamics; Interference; Load transfer; Loads; Mathematical models; Mechanical loads; Moments (Mechanics); Nonuniform flow; Propeller blades; Propellers; Simulation; Three dimensional flow; Thrust; Torque; Wakes
- Old TRIS Terms: Hydrodynamic configurations; Lifting surface theory; Lifting surfaces; Marine propellers; Marine surface propulsion; Moments; Propeller loading; Wake surveys
- Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;
- Accession Number: 00154734
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: SIT-DL-1899 Final Rpt.
- Contract Numbers: N0001467-A-0202-0047, N00014-75-C-0483
- Files: TRIS
- Created Date: May 31 1977 12:00AM