Resistance And Propulsion
The prediction of the achievable speed of a vessel is the primary task of a ship model basin. In the 280 m towing tank, reliable performance predictions are developed by means of resistance and propulsion tests based on the recommendations of the ITTC. These are also carried out for the verification of the EEDI.
In the very early stages of a project, speed predictions can be calculated from comparison with similar ships or with empirical methods.
Exact performance predictions are produced by means of viscous calculation methods (CFD). CFD calculations are also the basis for form optimisation and development of ship lines, the optimisation of appendages (bilge keels, stabilising fins, shaft struts …) and the optimisation of propulsion systems.
A selection of our services includes:
Calculation
- Design of ship lines
- Calculation of flow around the ship, determination of the wake field
- Optimisation calculations with potential theory and viscous methods
- Calculation of the interaction of ship, propeller and rudder with CFD methods (propulsion prediction)
- Power prediction by means of empirical methods and comparison of similar ships
Measurement
- Manufacturing of models
- Resistance tests (single and multi-hull vessels, displacement and planing hulls, submarines …)
- Propulsion tests (single and multi-screw ships, vessels with thrusters, podded drives, ducted propellers, Voith-Schneider propellers, waterjets, propulsion improving devices, submarines)
- Open water tests
- Wake measurements, colour and filament testing
PIV measurement of the unsteady wake field of the KVLCC2 ship (model scale).