When you need accurate data on ship propulsion power requirements, our CFD ship self-propulsion simulations are the closest you will get to them, except for runing physical experiments. This allows you to lead a more efficient ship design process and have more confidence moving forward with the hull design.

The interaction between the hull and propeller/s is essential when it comes to the ship propulsion power requirements, and needs to be taken into account. Ship propulsion CFD simulations allow having them both in a single numerical model enables this interaction to be correctly calculated, which is the approach used in our simulations.

The streamlined workflow process we developed for ship self-propulsion simulations enables us to deliver results within a few days, enabling you to quickly assess and reassess your design.

The numerical model takes into account the two-way interaction between the propeller and the hull, where the hull changes the inflow velocity profile to the propeller, while the propeller accelerates the flow, and changes the pressure field, affecting the pressure distribution along the hull.

CFD Self propulsion simulation model

The approach used for ship propulsion CFD simulations in our company uses the actuator disc model to represent the action of the propeller.

The actuator disc is used to impose a pressure jump and accelerate the flow, mimicking the action of the propeller; and at the same time serve as the sampling disc for the inflow velocity, which is a crucial input for assessing the power delivered to the propeller. The approach simplifies the propeller and makes these simulations useful for the dynamic process of vessel design.

What data do you get from our CFD simulations?

Our CFD Self Propulsion Simulations give you the essential data of the hull-propeller system. These include:

• Propeller thrust, torque and rotation rate;
• Thrust power,
• Delivered propeller power,
• Resistance of individual hull parts,
• Dynamic sinkage and trim of the vessel.

The CFD model allows us to separate individual hull parts and let you know how much power your rudders, skegs, structs and other appendages are spending. For example, often the rudders placed in the jet of the propeller consume more power than you expect. Make sure you know exactly what costs you power so that you can improve the design.