Propeller And Cavitation
The design of propellers is achieved mainly with the use of the SVA-developed program system VORTEX. Propulsion systems such as ducted propellers, thrusters, and podded drives are calculated and optimised with viscous calculation methods (ANSYS CFX, OpenFoam).
For the experiments with propellers and propulsion systems, high performance measurement systems are used in the towing tank and cavitation tunnel. The investigation of propulsion systems such as jet propellers, steering nozzles, thrusters, podded drives with tandem or counter rotating propellers, and bow thrusters or inline thrusters is a special service of the SVA. For the validation of CFD calculations, LDV and PIV measurements and flow visualisation with high-speed cameras are carried out. In addition to the calculations and model tests, full-scale measurements are made with a focus on propulsion, cavitation, pressure fluctuations and noise.
A selection of our services includes:
- Calculation of the flow around the ship and the determination of the wake field
- Propeller design
- Design of propulsion systems
- Calculation of the characteristic values (open water, cavitation inceptions, cavitation behaviour, hydrodynamic forces and moments, and induced pressure fluctuations)
- Optimisation calculations with potential theory and viscous methods
- Calculation of the interaction of ship, propeller and rudder with CFD methods (propulsion prediction)
- Strength assessment
- Manufacturing of models
- Standard tests with propellers and propulsion systems (open water and cavitation tests, measurement of the induced pressure pulses)
- Special tests with ducted propellers, counter rotating propellers, unconventional propellers, thrusters, podded drives, profiles, rudders, etc.
- Erosion tests, noise and pressure measurements, transient power measurements
- Flow measurement with LDV and PIV-measurement systems
- Full-scale measurements (propulsion, cavitation, noise, vibration excitation)