A modern vortex-lattice lifting-surface propeller blade design (PBD) code is coupled with a multi-element streamline curvature throughflow solver to efficiently analyze a marine propulsor in the presence
of a rotational inflow. In this loosely coupled technique, the propeller design program predicts propeller blade forces based on an assumed inflow velocity. These forces are then input into the streamline
curvature program which computes a new total inflow velocity field. The updated effective inflow velocity field is returned to the propeller design program, and new blade forces are computed. Convergence
is achieved usually after five or six loosely coupled iterations. The original researchers who developed this loosely coupled propeller design methodology relied upon Reynold's-Averaged Navier-Stokes (RANS)
throughflow solvers to compute the throughflow solution. The use of a streamline curvature code results in an order-of-magnitude reduction in the computational time required by the flow solver, and allows
nearer real-time design and analysis. Preliminary validation results show good agreement with both empirical and numerical tests.
Document Type: Research Article
Publication date: April 1, 2001
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