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Keywords: resistance
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Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-002
.... Times for computer model preparation and case execution are discussed together with computer requirements. An outline of the FloSim method is presented; it is an unsteady code with a coupled integral boundary layer analysis for viscous effects such as skin friction resistance and boundary layer...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-003
... of added resistance in waves. Non-linearity attitudes such as surfing can be investigated. Free-running model testing is a technique frequently used in the development of power vessels, but little adoption is made in the sailing yacht world. Furthermore dynamic and seakeeping studies are at present...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-014
... performance, sail performance, steady sailing performance and maneuvering performance. calculation high-speed sailing kanazawa institute jib variation sailing resistance wind speed wetted area solidfromphoto coefficient rudder twa center board thrust spinnaker heel angle olympic games...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-001
... at leeway than a rounded hull was proved. side force coefficient yaw angle prediction university drag coefficient froude number coefficient leeway angle newcastle university form factor rounded hull hull force coefficient side force resistance coefficient boeck 2010 lift coefficient...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-011
... the variation of the forces on a sailing yacht hull as speed, heel and leeway change. Finally, discussion will be made on how this first phase of the project may be used to inform handicap rule makers. yaw angle hull effective draft tank test resistance canoe body only ratio plot leeway cfd...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-001
... are presented, varying design parameters of the catamaran. upstream oil & gas resistance investigation artificial intelligence constraint wake sheet span optimization problem vorticity coefficient daggerboard solver vortex filament drag coefficient wind speed rudder wing free vortex...
Proceedings Papers

Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-001
... wave probes on each side. Variation of drag, side force, running attitude and wave pattern have been investigated. This paper focuses on the experimental investigations both in the upright and heeled conditions. wave resistance full scale boat speed form factor leeway angle model size hull...
Proceedings Papers

Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-009
... resistance preliminary results, and the scope of future work being Crr Residuary resistance coefficient initiated or planned. Although the schooner described Cx Driving force coefficient herein might be considered old school, the technical Cy Heeling force coefficient approach is absolutely relevant to any...
Proceedings Papers

Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-010
... from the stern. The opposite is done A set of towing tank tests was undertaken on a 1:4-model- when sailing at lower speeds, where the crew moves closer scale high-performance small sailing boat, which was a candidate for the 2016 Olympic games. The resistance, sink to keeping the vessel as flat...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-006
... experiments using extreme shifts in vertical volume distribution have been performed and compared with numerical predictions. Limits on submergence beneath which appendages effectively “see” no wave resistance have been established based on numerical and experimental results. force balance keel free...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-012
... The principal objective of this research was to determine the merit of transom lift devices on high-performance sailing craft. Transom lift devices modify running trim and also produce several other less-obvious hydrodynamic effects, all of which alter total resistance, thereby affecting...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-005
... will be performed. Than, a statistical analysis of the influencing quantities will be applied, identifying a suitable set of design parameters, and their effect on the performances of a sailing yacht. machine learning resistance yacht upright condition dataset total resistance residuary resistance...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-003
... issues related to (a) mesh generation, (b) solution, discretization, and free surface capturing algorithms, (c) turbulence modelling, (d) rigid body dynamics and sail force models. upstream oil & gas cfd code mesh evaluation reservoir simulation resistance free surface vertical force...
Proceedings Papers

Paper presented at the SNAME 18th Chesapeake Sailing Yacht Symposium, March 2–3, 2007
Paper Number: SNAME-CSYS-2007-015
... In upwind sailing conditions, bulbs of canting keel sailboats operate close to the water surface and therefore induce non-negligible changes in the wave system, thus influencing the wave making resistance of a sailboat. The bulb could produce relatively positive as well as negative effects...
Proceedings Papers

Paper presented at the SNAME 18th Chesapeake Sailing Yacht Symposium, March 2–3, 2007
Paper Number: SNAME-CSYS-2007-008
... angle model test dynamic effect wind force mast unsteady condition fluid dynamics resistance basin wave period wave condition sail arrangement marin THE 18th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2007 Hydrodynamic advice of Sailing Yachts through Seakeeping Study...
Proceedings Papers

Paper presented at the SNAME 18th Chesapeake Sailing Yacht Symposium, March 2–3, 2007
Paper Number: SNAME-CSYS-2007-004
... on the rudder in various conditions. Based on the measured results the the previous developped formulation within the DSYHS for the keel residuary resistance is validated and a new formulation for the downwash behind the keel is presented. In addition the expression within the DSYHS for the sideforce...
Proceedings Papers

Paper presented at the SNAME 17th Chesapeake Sailing Yacht Symposium, March 4–5, 2005
Paper Number: SNAME-CSYS-2005-012
... the DSYHS and presented by = yaw angle Keuning and Sonnenberg in 1998 and 1999, Reference [4], Ixx = (total) roll mass moment of inertia could be used straight away, such as the determination of the Jzz =(total) yaw mass moment of inertia upright resistance and the resistance increase due to heel...
Proceedings Papers

Paper presented at the SNAME 17th Chesapeake Sailing Yacht Symposium, March 4–5, 2005
Paper Number: SNAME-CSYS-2005-002
... corrections. Additional aerodynamic load calculations are made to determine the parasitic drag of the rig and hull. air transportation simulation yacht artificial intelligence diffraction load rodan sname resistance prediction chesapeake sailing yacht symposium contribution symposium trial...
Proceedings Papers

Paper presented at the SNAME 17th Chesapeake Sailing Yacht Symposium, March 4–5, 2005
Paper Number: SNAME-CSYS-2005-005
... examples are shown: a study of the impact of the ACC V4/V5 rule changes and a comparison of a canting keel and a conventional keel yacht. artificial intelligence efficiency boat speed tank test result ballast keel resistance coefficient keel configuration force coefficient test run...
Proceedings Papers

Paper presented at the SNAME 17th Chesapeake Sailing Yacht Symposium, March 4–5, 2005
Paper Number: SNAME-CSYS-2005-014
... to accomplish the goal of creating a velocity prediction program, multiple essential pieces of the data were needed. In particular, the hydrodynamic resistance data, aerodynamic drive and side force data, and hydrodynamic side forces were needed. To determine the dynamic trim of the dinghy, a series...

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