NUMERICAL FLOW AND PERFORMANCE ANALYSIS OF MARINE PROPULSOR WITH ROTOR-STATOR INTERACTION

摘要

The present work has solved 3D incompressible RANS equation on the rotating, non-orthogonal multi-blocked grid system to efficiently analyze a ducted marine propulsor with rotor-stator interaction. To handle the interface boundary between a rotor and a stator, the sliding multiblock technique using the cubic spline interpolation and the bilinear interpolation technique was applied. The flowfield around a single-stage ducted marine propulsor was simulated and the hydrodynamic performance coefficients were computed. Then, a waterjet propulsion system was simulated to provide detail understanding of complicated three-dimensional viscous flow phenomena including interactions of intake duct, rotor, stator, and contracted discharge nozzle. The numerical results were compared with experiment and a good agreement was obtained. The complicated viscous flow feature of the waterjet, such as the secondary flow inside of the intake duct, the recovery of axial flow by the action of the stator, and tip vortex, etc. were well understood by the present simulation. The performances of thrust and torque were also predicted.