... flettner rotor ppp mast rotation simulation engine drive force leeway dynarig wind angle ship yacht commercial shipping virtual wind tunnel efficiency superstructure requirement wind speed THE 24TH CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, JUNE 2022 Progress in development...

...) simulations with a free surface. In the simulations the foil is moved in prescribed motions in one degree of freedom (DOF) at a time and dynamic coefficients are extracted for different frequencies of motion. All coefficients are combined in a coupled system of equations, and the equations can be solved in 6...

... 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...

... 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...

.... 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...

... be an improvement over existing methods, simulating the 6 degrees of freedom motions and accelerations. The unique un-restrained sailing test approach uses a mast mounted air screw device to simulate the aerodynamic propulsion from the sails allowing a scaled model of the yacht to be tested at a range...

... 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...

... 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...

... 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...

... 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...

... in the literature. The wave excitation is limited to the calculation of Froude - Krylov forces. logic & formal reasoning spyrou yacht wave position sailing yacht logic programming calculation excitation coefficient artificial intelligence simulation hull proceedings formulation element...

... 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...

... and displacement. Response surfaces are generated from a 64 data point array of RANS VOF simulations. upstream oil & gas measured data coefficient sensor hull distortion vpp simulation contour boat speed correction shape stripe standard deviation awa stripe anemometer ran rudder angle...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

..., University of Applied Sciences Kiel (UAS), Germany ABSTRACT K flow acceleration coefficient L reference length A new method to simulate laminar-turbulent p pressure transition has been used to study flow around sailing yacht PK production term of k equation appendages. Based on an empirical correlation...