CFD for +6-DoF Hydro with Aero imulations

CFD for +6-DoF Hydro with Aero imulations

Client

Confidential

Year

2025

Design Team

Daniel Riveros

Technical Specs

Simulation for optimization and validation of WASP ships with different methods, e.g. Flettner Rotors and Rigid Wings, as well as for Sailing Boats.

Our CFD engineer developed a new CFD tool for analyzing and optimizing sailboats and WASP systems for the nautical and maritime industry, optimizing hydrodynamic and aerodynamic performance in assessments with +6 Degrees of Freedom, including the ship dynamic rotations and translations plus the degrees of freedom of the aerodynamic propulsion systems. The project combined advanced CFD simulations with propulsion control logics to provide powerful insights for the design and improvement processes of high performant ships and sailboats.

Challenge / Brief

The optimized equilibrium points provided by an in-house VPP tool need to be tested in a realistic setup where hydrodynamic and aerodynamic forces are simultaneously defining the attitude and performance of a ship propelled by a set of Flettner rotors and traditional propellers.

Approach / Methodology

This new CH CFD tool is the right and effective solution to confirm that the VPP prediction is aligned to the real behavior of this wind assisted propulsion ship. It allowed us to evaluate the hydrodynamic loads on the ship while sailing in the sea and individually evaluate the propulsion provided by each of the Flettner rotors onboard. This offered a detailed assessment of the propulsion power required from the rotors and the propellers. Finally, the results also present a powerful visualization tool to understand the strong interaction that WASP systems usually have with the ship and with themselves, a key insight in the layout definition stage of a highly efficient ship.

Outcome / Impact

      • CFD simulations on STAR-CCM+
      • Tested as validation tool for in-house VPP
      • Dynamic simulation of ships degrees of freedom: Surge, Sway, Heave, Roll, Pitch and Yaw.
      • Simulation and control of devices’ control variables, e.g. rotation rate (RPM), sail inventory and configuration.

Technical Datasheet

Dimensions

Software

Testing Protocols

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