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Designing efficient hulls using CFD

The next step?

There is still a lot CJR wants to achieve. ‘We’ve been delighted with the results so far but as with any service which is centred around advanced technology, things are progressing all the time,’ says Russell. ‘We’re commissioning our own super computer and that will help improve the time it takes to get results and to enable us to offer our services outside our existing customer base.

‘We see the scope of CFD as almost endless and we’re always looking for ways we can extend the work we are doing to other manufacturers, potentially purely as a consulting service, working with yacht designers from the outset.

‘We are often limited by the information we receive from the customer and the 3D geometries supplied by different boat manufacturers can require a significant amount of work before it can be imported into the CFD program for analysis. If we can standardise this process so we always receive the same information, we believe we can reduce the time between receiving the 3D geometry and producing preliminary results considerably. Combine that with the constant refinement of the CFD process and we will have a truly unique product offering, one which none of our direct rivals can compete with.’

CJR hopes to further extend the scope of the CFD process and has ambitions of soon being able to model the entire sterngear with the propeller rotating, as well as allowing the hull to find its own running trim during the CFD simulation. This currently isn’t economically viable but should become more realistic with further advances in CFD, computer power and industry experience.

In their own words, Russell and the CJR team are only just getting started but they appear to be on the right track. And, as boat builders and naval architects increasingly sign up for the service, it might not be too long before the idea of specifying an unoptimised propeller on your motor yacht seems as strange as opting for rope rigging for your new 40m ketch.

Photography: Courtesy of CJR Propulsion and Hydro Tec

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