AHFID Propulsor Performance Prediction
Abstract
The thrust and torque of the propulsor tor the Advanced Hull Form Inshore Demonstrator were predicted using a vortex lattice propeller code coupled with an Euler solver. The propulsor is a post-swirl ducted unit with the rotor band recessed into the duct inner surface. To predict the additional torque due to the recessed band, empirical methods were used. The demonstration-scale propulsor is predicted to absorb 2360 hp (1760 kW) and produce a net thrust of 19,200 lbs (85.4 kN) at the design condition of 26 knots, 325 rpm. At the motor torque limit of 33,350 ft-lbs (45.2 kN-m) and the design advance ratio, the unit is predicted to achieve 24.3 knots at 303 rpm. The effect of the band was found to be significant. The band contributes 4% to the total rotor torque. The thrust on the band increases the rotor thrust but does not affect the net thrust of the unit.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2002
- Accession Number
- ADA399858
Entities
People
- Otto Scherer
- Stuart D. Jessup
- Thad J. Michael
Organizations
- Naval Surface Warfare Center Carderock Division