Numerical Simulation of Tip Vortices of a Ducted Rotor
NAVAL SEA SYSTEMS COMMAND HEADQUARTERS ARLINGTON VA ADVANCED SUBMARINE R AND D OFFICE (93 R)
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A ducted rotor was tested in the 36-inch water tunnel at David Taylor Model Basin, Naval Surface Warfare CenterCarderock Division. At the blade tip, both leakage and trailing edge vortices were observed through cavitation inception. Detailed flow patterns in the vortices have been mapped with LDV technique. Numerical calculations, based on a Reynolds-averaged Navier-Stokes formulation, were performed to simulate the observed vortices. To reduce the numerical diffusion, a fifth-order-accurate upwind differencing scheme was implemented to evaluate the flux difference across the cell surface. The results were compared with the experimental data.
- Statistics and Probability
- Fluid Mechanics
- Hydraulic and Pneumatic Equipment