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Keywords: simulation
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Proceedings Papers

Paper presented at the SNAME 24th Chesapeake Sailing Yacht Symposium, June 10–11, 2022
Paper Number: SNAME-CSYS-2022-005
... sustainable development upstream oil & gas climate change sustainability freight & logistics services marine transportation social responsibility flettner rotor ppp mast rotation simulation engine drive force leeway dynarig wind angle ship yacht commercial shipping...
Proceedings Papers

Paper presented at the SNAME 24th Chesapeake Sailing Yacht Symposium, June 10–11, 2022
Paper Number: SNAME-CSYS-2022-002
... frequency variation leeway angle force area the foil asymptotic behavior dynamic coefficient pitch 2 water surface coordinate system simulation time step nacra 17 force signal heave motion fluid dynamics different frequency coefficient amplitude mass coefficient equation...
Proceedings Papers

Paper presented at the SNAME 24th Chesapeake Sailing Yacht Symposium, June 10–11, 2022
Paper Number: SNAME-CSYS-2022-007
... is required. Using a two-dimensional section of the wingsail, lift and drag characteristics were found using Reynolds Averaged Navier-Stokes (RANS) simulations within Star-CCM+. A modified lifting line (LL) model was programmed in Python which used the two-dimensional characteristics to give fast and accurate...
Proceedings Papers

Paper presented at the SNAME 24th Chesapeake Sailing Yacht Symposium, June 10–11, 2022
Paper Number: SNAME-CSYS-2022-009
... be trained and learned by means of computer simulations to assess a large range of approaches to the starting box. This project used game theory to model the start of a match race, intending to develop and study strategies using Monte-Carlo tree search to estimate the utility of a player’s potential moves...
Proceedings Papers

Paper presented at the SNAME 24th Chesapeake Sailing Yacht Symposium, June 10–11, 2022
Paper Number: SNAME-CSYS-2022-016
.... Various structural configurations will be analysed using the framework outlined in this paper. artificial intelligence wedge deadrise angle water impact problem upstream oil & gas transverse section mesh solver vof method water impact simulation free surface impact event...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-003
... outperforming other design candidates in calm water would also perform well in waves. Therefore, the Wolfson Unit developed an innovative experimental model testing approach that would be an improvement over existing methods, simulating the 6 degrees of freedom motions and accelerations. The unique un...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-007
... Maneuver Simulation and Optimization for AC50 Class Dr. Heikki Hansen, Oracle Team USA / DNV GL SE, Potsdam, Germany Dr. Karsten Hochkirch, Oracle Team USA / DNV GL SE, Potsdam, Germany Ian Burns, Oracle Team USA, San Francisco, USA Scott Ferguson, Oracle Team USA, San Francisco, USA ABSTRACT...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-009
... of a bi-dimensional section of a spinnaker, will also be presented here for the first time. These results allow to interpret some inconsistent data from past experiments and simulations, and to provide guidance for future model testing and sail design. NOTATION AoA Angle of Attack CFD Computational Fluid...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-010
... Force represents the image of this load applied at point A (the point where the actuator is fixed). Figure 6: Rudder mechanism Figure 7: Results of the load model This load model is validated thanks to the instrumentation of a sailboat. As shown in the graph above (Figure 7), the load simulation from...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-012
... of an A-Class catamaran is simulated by using the RANSE software FineMarine with its volume of fluid method. The C-shaped hydrofoil is analysed for one speed at Froude Number 7.9 and various angles of attack (AoA). The rake was defined and a leeway angle was applied to simulate realistic set ups...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-010
... consideration. The model w is built for simulating ship motions in 6 degrees of freedom. Longitudinal center of effort (m) Three different coordinate systems are used: an earth-fixed, xCG Transverse center of effort (m) non-rotating, coordinate system xO, yO , zO ; a wave fixed xCEFF system that travels...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-009
... dynamic results that cannot be accurately predicted with a steady approach. These results are therefore valuable for future FSI numerical tools validation in unsteady conditions. simulation oscillation upstream oil & gas design shape coefficient amplitude frequency cf sheet yacht sail...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-002
... a number of standard marine sensors simulations. including a sonic anemometer, a GPS, a digital compass, an accelerometer and a gyroscope with custom sensors that NOTATION measure rudder and boom angles as well as a custom sail shape acquisition system. The RANS based VPP developed CSYS Chesapeake Sailing...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-010
... are selected for the comparison, and both shapes are analyzed with numerical simulations and physical experiments. We study the change in sailboat performance due to the different aerodynamic and material properties of the rigging. A velocity prediction program (VPP) is used to quantify the performance change...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-007
... by simplified theoretical or empirical models potentially neglecting complex physical phenomena. The paper proposes a method circumventing these inaccuracies. It is based on the idea to directly derive Sailing Yacht performance from a RANSE flow simulation. This is done by coupling the prediction of sail forces...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-002
... of varying stresses and strains due to the motion and inertia. The simulation results from the FSI model compare very well with the experimental data for steady sailing conditions. For the unsteady conditions obtained in head waves, the first results show a good agreement between measurements and simulation...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-013
... Virtual Sailing (VS) has been producing the world’s only ride-on sailing simulator for 10 years. Based on fundamental principles of sailing dynamics the underlying simulation has shown great robustness permitting significant R&D to be performed and retrofitted to existing simulators...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-010
... Letter Enhancement Project experimental measurement to develop and validate a wind- TW true wind heel model, as well as understand the nature of how these TWA true wind angle vessels respond to different wind situations. The CFD TWV true wind velocity simulations are used to assess errors in measured...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-006
... algorithm for simulation of steady or unsteady motions, years ago, most desktop based CFD was limited to analysis Trefftz-plane induced drag computation, and limited of 2-D foil sections or potential flow solutions of isolated computation of boundary layer parameters using a two appendages sets. Potential...
Proceedings Papers

Paper presented at the SNAME 18th Chesapeake Sailing Yacht Symposium, March 2–3, 2007
Paper Number: SNAME-CSYS-2007-005
... upstream oil & gas simulation appendage boundary layer grid completion installation and operations transition turbulence intensity investigation kinetic energy destruction term calculation ballast bulb turbulent flow variant reynolds number equation benchmark bulb momentum...

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