Publications:

Controlling the height of Hydro foiling Boats in state of the art CFD

4 February 2015 | oossanen

On the 4th of December Friso Bergsma from Van Oossanen Naval Architects presented a paper on controlling the ride height of hydro-foiling boats in RANSE CFD at the 9^th International Conference On High-Performance Marine Vehicles.

Friso Bergsma explained the method that was developed successfully Van Oossanen Naval Architects to simulate the transition of a hydro foiling solarboat from displacement mode to fully foiling mode at a targeted ride height. To reach and maintain this ride height the pitch of all foils was controlled during the simulation.

A copy of the paper as presented at the conference can be downloaded. A video of the vessel rising out of the water and maintaining a level ride height can be found here.

Controlling the height of Hydro foiling Boats in state of the art CFD

30 October 2014 | oossanen

In the never ending quest for speed, foiling is considered a holy grail in many design classes. The most recent America’s Cup showed spectacular sail racing on foils. With the yearly Dong Energy solar challenge boasts several vessels obtain tremendous advantages by rising to their foils and taking the lead. These high tech racers are only powered by solar energy and aim for the most efficient use of the available power.

Van Oossanen Naval Architects simulated the transition of a hydro foiling solarboat from displacement mode to fully foiling mode at a targeted ride height. To reach and maintain this ride height the pitch of all foils was controlled during the simulation.

The Computational Fluid Dynamics (CFD) package used at Van Oossanen is Fine/Marine by Numeca. The full possibilities of this package were used. The ride height was controlled by using Dynamic Libraries. To allow the pitching of the foils, so called sliding grids were used. To accurately capture the water surface, the grid around the boat was dynamically adapted to the water surface by means of Adaptive Grid Refinement (AGR). These three features of Fine/Marine in general and this simulation in particular, will be explained the three features: Ride height control, sliding grids and water surface capturing. You can see the results in this video.

Contribution year-book Scheepsbouwkundig Gezelschap “William Froude”

16 January 2014 | oossanen

The Scheepsbouwkundig Gezelschap “William Froude” has compiled a year-book named: “Het roer om”.

Piet van Oossanen, founder of Van Oossanen Naval Architects, contributed to this fine year book by writing an article about the development of the Hull Vane™ (in Dutch).

The Scheepsbouwkundig Gezelschap “William Froude” is the studen association of Naval Architecture and Marine Engineering at the Delft University of Technology. The association was founded on the 17^th of November 1903 and has been involved in monitoring and improving the quality of the education. Next to this, organizing excursions, guest lectures, social activities and other means to support its members in their academic career has been an important part of its existence. The S.G. “William Froude” offers its members the opportunity to discover the many aspects, possibilities and developments of the maritime industry in the Netherlands and abroad.

Read the article about the Hull Vane™ (in Dutch).

Interior_WilliamFroude_25-11-2013_het_roer_om_Hull_Vane