CFD helps optimize yacht design process
MARIN’s day-in-day-out experience gained through more than a 1,000 projects has allowed the institute to build up a vast knowledge of CFD applications. As well as the more complex analysis available that is continuously under development at MARIN, here Report presents the more “standard” CFD use, which is as popular as ever.
lthough CFD started as a complex technology with huge potential it is now at the heart of our engi- neering, complementing and in some cases replacing, model testing. Certainly it provides a valuable insight into the complexity of hy- dromechanics with only a few “smart” key- strokes. Combining the basic potential flow technology and (unsteady) RANS methods, the hull form, appendages and their align- ment can be evaluated and optimised in a cost-effective and accurate way. This ready availability fits perfectly in (pre-contract) design work. This is especially important when clients may have a pass-through time of only a few days or a couple of weeks.
A
It is of utmost importance that strengths should be utilised and there must be an awareness of the shortcomings of these tools in any successful project. Experience gained through numerous projects ensures a sensible use of CFD. MARIN’s focus on validation is addressed in other articles in this issue of Report.
Giedo Loeff
g.loeff@marin.nl yacht@marin.nl
Explorer yacht The project illustrated here concerns a 39 m Explorer yacht to
1998 14
1st FPSO Forum
be built at Alloy Yachts in Auckland, New Zealand. The yacht was designed by René van der Velden for a private owner.
In close cooperation with the naval architect the streamlines and dynamic water surface are easily integrated in 3D models. In this way, the impact of the flow on appendage alignment and on submergence of exhausts and interaction with fenders and anchor pockets can be verified. Some sample applications are illustrated here as conducted for René van der Velden’s yacht design.
Reading the streamlines into their 3D model, (see renderings), the bilge keel location, alignment and mutual location with respect to the fin stabilisers were selected to ensure optimum roll damping. This amongst other alignments and a verification of the hull form was conducted parallel to the engineering process with a pass-through time of a couple of weeks.
With more than 1,000 commercial CFD projects under our belt, MARIN is the ideal partner to assist in the design process.
1998
Opening MARIN Inc. in Houston, USA
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24
