Tidal Stream Turbine

Shape Optimization of a Tidal Stream Turbine using CAESES and STAR-CCM+

Logo SIREHNA

When the French marine technology experts at Sirehna set out to design the turbine for OpenHydro, the Irish tidal technology specialist, they turned to CAESES for it’s design and optimization.

CAESES’ geometry modeling capabilities were used to design the turbine using 19 design variables. This model allowed for automated generation of design variants ready to go for simulation.

Unlike traditional CAD tools, the models were robust and guaranteed high fidelity without the need for manual repair and modification.

SIREHNA Model in CAESES

Parametric CAESES model to robustly generate new geometry variants in a fully automated process

 

CFD Automation and Optimization

These geometries were then coupled to CD-adapco’s STAR-CCM+ to evaluate over 700 designs in an automated loop.

The optimization resulted in a turbine with substantially improved efficiency and torque that was robust over a wide operating range.

CFD Results shown in STAR-CCM+

Typical CFD results for a design candidate, generated in STAR-CCM+

 

Power For Over 400 Homes

The project is now up and running in Paimpol-Bréhat in Brittany, France. It’s the world’s first large-scale tidal energy farm and delivers 8 MW of tidal power for over 4000 homes in the region.

sirehnaturbine

The final tidal stream turbine with highly optimized blade and duct components

Pol Muller“In our experience, using CAESES for creating parametric models was MUCH faster and easier than with our traditional CAD tool.

With CAESES we can now create all of the design candidates in hours instead of weeks!”

— Pol Muller, Head of Thrusters

 

With kind permission of SIREHNA, Naval Group.


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