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Development of Hydrofoils and CFD tools
at Van Oossanen Naval Architects F.M.J. Bergsma, M.Sc.
About Us
Founded in 1992
Situated in Wageningen, NL
14 Crew
Fields of work:
Motor Yacht Design
Sailing Yacht Design
CFD
Consulting
Peter van Oossanen
Perry van Oossanen
Niels Moerke
About Us
• Designed and launched almost 100 vessels
• Currently 12+ yachts under construction
• 6 yachts currently under design
• Working for both Yards and Owner’s directly
Sailing Yachts
• The roots of the company are in
(racing) sailing yachts
• Naval Architecture:
• Cruising & Production
Yachts
• Super Yachts
• Traditional Dutch Sailing
Yachts
• CFD-based design optimization
• Design advice
First Swiss America’s Cup Challenger FAST 2000
Lemsteraak “BS2”
Zeydon 60, with BMW Design Group
Computational Fluid Dynamics
• Numerical Flow Simulations
• Matured rapidly over the last decade
• “Revealing what hasn’t been seen before”
• Study of the flow in great detail
Detailed CFD for 65m FDHF
CFD for 24m Semi-Displacement Motor Yacht
CFD based design optimization for 120m Coaster
Motor Yachts
• The majority of the projects are
concerned with motor yachts
• Naval Architecture:
• Super Yachts
• Platform Development
• Small (Production) Yachts
• Fast Tenders
• CFD-based design optimization
• Optimization of propulsive efficiency
9.5m Tender, 12 persons
50m Motor Yacht “Satori”
Galactica Star
Hull Vane®
• Fixed foil below stern
• Resistance reducing
• Up to 25% reduction
• Provides forward thrust
• Corrects trim
• Sister company of Van Oossanen
Hull Vane on Le Defi Areva, America’s Cup 2003
Hull Vane on Crew supply vessel Karina, 2014
Introduction - Outline
• Development of Hull Vane®
• Development process
• Working principle
• Results
• CFD of transition to foiling mode
• CFD method
• Control strategy
• Results
• Summary
Hull Vane - Development Process
Hull Vane - Development Process
Hull Vane - Development Process
Hull Vane – Working principles
• Thrust force
• Trim correction
• Wave reduction
• Reduction of motions in waves
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Working principles
Hull Vane - Results
• CFD computations
• Done by Van Oossanen Naval Architects
• FINE/Marine CFD package
• Model tests
• MARIN, the Netherlands
• Wolfson Unit, UK
• Full-scale sea trials
• 55 metre Fast Supply Intervention Vessel
• 42 metre Motor Yacht
• Rijnborg:
• Scope
• CFD
• Model testing
• Resistance reductions
• 10.1% at 17 kn.
• 15.5% at 21 kn.
• Higher resistance
reductions in waves
Hull Vane - Results
Hull Vane - Results
• Karina:
• Scope
• CFD
• Model testing
• Sea trials
• Resistance reduction
• 12-15% at 12-20 kn.
Results – Hull Vane
CFD - Introduction
CFD - Introduction
CFD - Introduction
CFD - Introduction
CFD - Method
• FINE/Marine (Numeca)
• Incompressible RANSE solver ISIS
• Menter-SST turbulence model
• Unstructured hexahedral mesh
• Vessel is free to trim and rise
• Sliding grids
• Adaptive grid refinement (AGR)
CFD - Method
• Sliding grids
CFD - Method
• Adaptive Grid Refinement (AGR)
CFD - Method
• Adaptive Grid Refinement (AGR)
CFD - Control strategy
𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑟𝑖𝑑𝑒 ℎ𝑒𝑖𝑔ℎ𝑡
𝑅𝑖𝑠𝑒 error
− 𝐾𝒑 𝑒𝑟𝑟𝑜𝑟
𝐾𝒊 𝑒𝑟𝑟𝑜𝑟𝑡
0
+
𝐹𝑜𝑖𝑙 𝑝𝑖𝑡𝑐ℎ 𝑎𝑛𝑔𝑙𝑒
𝐏𝐫𝐨𝐩𝐨𝐫𝐭𝐢𝐨𝐧𝐚𝐥
C𝐮𝐦𝐦𝐮𝐥𝐚𝐭𝐢𝐯𝐞
CFD - Results
CFD - Rise & Trim
CFD - Error on rise
CFD - Pitch angles
CFD - Lifting force
Summary
• Hull Vane
• Corrects trim
• Provides forward thrust
• Reduces resistance
• Simulation of transition to foiling mode
• RANSE based CFD analysis
• FINE/Marine
• Adaptive Grid Refinement
• Sliding grids
• Ride height control
• Control strategy for pitch of foils
visit & mail us: contact us: follow us:
Costerweg 1B T +31 (0) 317 451573 www.oossanen.nl
6702 AA, Wageningen [email protected] @oossanen
The Netherlands
