General information
The first important step in hull form optimisation is to recognize which type of vessel is to be optimized. The operability and performances of the ship must be considered in details, other points of intention are ports limitations, ship owner requirements, slamming, vibrations and structural requirements. In the general the optimisation is focused on minimizing the resistance by mainly reducing the wave resistance.
The first important step in hull form optimisation is to recognize which type of vessel is to be optimized. The operability and performances of the ship must be considered in details, other points of intention are ports limitations, ship owner requirements, slamming, vibrations and structural requirements. In the general the optimisation is focused on minimizing the resistance by mainly reducing the wave resistance.
Services & Activities
The Ships Powering Department is involved in hundreds of hull form optimisations every year. In general the performance of a ship for a resistance point of few improves with every reduction of wave resistance. The Computational Fluid Dynamic program RAPID developed at MARIN is a perfect tool to use for this purpose.
RAPID can be used for estimating and computing the wave profile of a vessel sailing at a certain speed. If different modifications are applied, some comparisons and conclusions can be easily drawn visualizing the profile and amplitude of the waves on the hull, sideway and in the wake field.
For hull forms were viscous effects play an important role PARNASSOS is used, which is an efficient, state-of-the-art RANS solver for predicting the flow over a ship hull. It predicts the velocity field, streamline pattern, and pressure distribution, and is used e.g. to eliminate separation phenomena and predict the wake field.
The Ships Powering Department is involved in hundreds of hull form optimisations every year. In general the performance of a ship for a resistance point of few improves with every reduction of wave resistance. The Computational Fluid Dynamic program RAPID developed at MARIN is a perfect tool to use for this purpose.
RAPID can be used for estimating and computing the wave profile of a vessel sailing at a certain speed. If different modifications are applied, some comparisons and conclusions can be easily drawn visualizing the profile and amplitude of the waves on the hull, sideway and in the wake field.
For hull forms were viscous effects play an important role PARNASSOS is used, which is an efficient, state-of-the-art RANS solver for predicting the flow over a ship hull. It predicts the velocity field, streamline pattern, and pressure distribution, and is used e.g. to eliminate separation phenomena and predict the wake field.
Facilities & Tools
For hull form optimisation, several computational tools of a variety of accuracy and complexity are used:
For hull form optimisation, several computational tools of a variety of accuracy and complexity are used:
DESP: Prediction of propulsive performance
RAPID: Calculation of wave resistance and potential flow
PARNASSOS: Calculation of the viscous flow around ships hulls
ReFRESCO: Versatile CFD tool for marine hydrodynamics
RAPID: Calculation of wave resistance and potential flow
PARNASSOS: Calculation of the viscous flow around ships hulls
ReFRESCO: Versatile CFD tool for marine hydrodynamics
Software Sales
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.
Experience
The list below gives a review of hull form optimisation work carried out at MARIN:
The list below gives a review of hull form optimisation work carried out at MARIN:
- Container vessels, for yards like: Odense shipyards.
- Cruise liners for yards like, Aker Finnyards Inc.
- Ferries for yards like, Fincantieri Shipbuilding
- Luxury motor and sailing yachts, for yards like De Voogd Naval architects
- Hopper dredgers, for yards like IHC Shipbuilding
- Working vessels, for yards like Damen shipyards
- Navy vessels, including submarines for several navies
Most recent hull form optimisation related papers presented by MARIN
(complete overview of papers can be found under Publications)
(complete overview of papers can be found under Publications)
Prediction Of The Transom Flow Regime With Viscous Free Surface Computations
Ploeg, A. van der and Starke, A.R., IV International Conference on Computational Methods in Marine Engineering (ECCOMAS MARINE), Lisbon, Portugal, 2011
On the Design and Analysis of Pre-Swirl Stators for Single and Twin Screw Ships
Zondervan, G.J.D., Holtrop, J., Windt, J. and Terwisga, T.J.C. van, SMP 2nd International Symposium on Marine Propulsors, Hamburg, Germany, 2011
Trim wedge optimization using RANS/FS
Starke, A.R., Ploeg, A. van der, and Veldhuis, C.H.J., RINA Developments in Marine CFD, 2011
Validation of an approach to analyse and understand ship wave making
Raven, H.C., Journal of Marine Science and Technology, 2010
Computation of Scale Effects in Free-Surface Flows near a Ship’s Transom
Ploeg, A. van der, Chao, K., Marzi, J. and Wackers, J., 13th Numerical Towing Tank Symposium (NuTTS'10), Duisburg, 2010
Ploeg, A. van der and Starke, A.R., IV International Conference on Computational Methods in Marine Engineering (ECCOMAS MARINE), Lisbon, Portugal, 2011
On the Design and Analysis of Pre-Swirl Stators for Single and Twin Screw Ships
Zondervan, G.J.D., Holtrop, J., Windt, J. and Terwisga, T.J.C. van, SMP 2nd International Symposium on Marine Propulsors, Hamburg, Germany, 2011
Trim wedge optimization using RANS/FS
Starke, A.R., Ploeg, A. van der, and Veldhuis, C.H.J., RINA Developments in Marine CFD, 2011
Validation of an approach to analyse and understand ship wave making
Raven, H.C., Journal of Marine Science and Technology, 2010
Computation of Scale Effects in Free-Surface Flows near a Ship’s Transom
Ploeg, A. van der, Chao, K., Marzi, J. and Wackers, J., 13th Numerical Towing Tank Symposium (NuTTS'10), Duisburg, 2010
Most recent hull form optimisation articles written for MARIN Report:
(complete overview of articles can be found under Publications)
(complete overview of articles can be found under Publications)
CFD facilitates better understanding of scale effects
Auke van der Ploeg & Douwe Rijpkema, MARIN Report, 2011
Prediction of added resistance of ships in waves under further scrutiny
Reint Dallinga, MARIN Report, 2011
Correlation of speed-power predictions by model tests
Michiel Verhulst, MARIN Report, 2010
CFD versus PIV
Christian Veldhuis, MARIN Report, 2010
Measuring success
MARIN Report, 2009
Auke van der Ploeg & Douwe Rijpkema, MARIN Report, 2011
Prediction of added resistance of ships in waves under further scrutiny
Reint Dallinga, MARIN Report, 2011
Correlation of speed-power predictions by model tests
Michiel Verhulst, MARIN Report, 2010
CFD versus PIV
Christian Veldhuis, MARIN Report, 2010
Measuring success
MARIN Report, 2009
Contact
For more information on how MARIN can help your organisation with the issue of hull form optimisation, please contact the knowledge group Resistance and Propulsion at powering@marin.nl
For more information on how MARIN can help your organisation with the issue of hull form optimisation, please contact the knowledge group Resistance and Propulsion at powering@marin.nl