... hydrofoil coefficient configuration marine transportation wetted surface area hull vpp trim parameter vpp model THE 24T H CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, JUNE 2022 Velocity Prediction Program for a Hydrofoiling Lake Racer Michele Francesco Melis, Hamburg University...

... to the predictions from XFLR5. weather daggerboard hull shape boat speed good correlation yacht xflr5 svpp race data dvpp chord length daggerboard america ac75 hull velocity prediction program coefficient twa foil THE 24TH CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, JUNE 2022...

... method free surface computation air emission velocity potential coefficient rudder angle equation wing sail inertial force marine transportation free surface boundary condition aerodynamic model aerodynamic force surface elevation drag coefficient THE 24TH CHESAPEAKE SAILING YACHT...

... been applied to predict the motions of foiling or skimming boats in unsteady conditions. Typically, the aerodynamic forces are computed by the quasi-steady theory assumption. Static coefficients are used and the applied velocities are corrected with boat motions. The hydrodynamic forces of a fully...

... transition geometry correction blockage tunnel reynolds number free surface experiment coefficient water tunnel drag coefficient university blockage ratio wind tunnel THE 24TH CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, JUNE 2022 Development of a blockage correction for highly...

... for maximum performance. graf prediction wingsail profile machine learning accuracy surrogate model camber ll code order model stall ll model configuration flap angle machine learning algorithm profile optimisation ran simulation artificial intelligence simulation coefficient drive...

... submergence to compute foils’ hydrodynamic forces, for example to be used in Velocity Prediction Programs (VPP) of foiling crafts. passenger transportation free-surface deformation mesh amplitude reservoir simulation hydrofoil convergence study hydrodynamic coefficient experimental data...

... be expected to occur naturally at model scale. Definition of drag, lift, resistance, side-force coefficients The main model dimensions are given in Table 2. Coefficients are made dimensionless using the product of area and dynamic pressure. The reference area, A, is normally the immersed projected side area...

... Foil chord Oswald Efficiency Factor Drag Coefficient Induced Drag Coefficient Wave Drag Coefficient Junction Drag Coefficient Wave and Spray Drag Coefficient Lift Coefficient Lift Coefficient at immersion h DA Drag Area Junction Drag Wave and Spray Drag Immersion LA Lift Area Re Reynolds Number...

... Center of buoyancy c Chord of the section (m) Cp Prismatic coefficient G Center of gravity of the yacht g Gravity acceleration (m.s-2) Ix Roll moment of inertia (kg.m2) Iy Pitch moment of inertia (kg.m2) Iz Yaw moment of inertia (kg.m2) Ixy Roll and pitch product of inertia (kg.m2) Ixz Roll and yaw...

... reach attitudes that widely differ from the steady ones. NOTATION A Wave amplitude A Added mass coefficients matrix B Damping coefficients matrix Fn Froude number Fi Force component i g Acceleration of gravity I Yacht inertia matrix K Retardation function matrix m Yacht mass n Outgoing body s normal...

... length froude number effective aspect ratio lift coefficient chesapeake sailing yacht symposium coefficient chord length variation transom-hung rudder rudder strut A Case Study on the Effect of Sweep and Variations in Free-Surface Cross Section Geometry on the Lift and Drag of Transom-Hung...

... 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 trapeze hull wind angle In order to sail 470 faster, authors consider...

... of the steady form of the Lifting Surface Theory, in order to obtain the force and moment coefficients, while the deformed shape of each sail is obtained using a relatively simple Shell Finite Element formulation. The hydrodynamic part consists of modeling hull reaction, hydrostatic and wave forces...

... velocity made good downwind is measured from the on-the-water experiments, and is associated with an increase of thrust during characteristic dynamics of the airfoil or sail shape in the laboratory. centerline stripe geometry draft stripe frequency sail section coefficient cornell university...

... 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...

... controlled conditions (wind, sheet length) with a dynamic trimming system. First the optimum optimization target CFobj coefficient with a steady trim for AWA = 60 degrees using the car traveler position and main sail sheet length is located. Oscillation are then done around this optimum value using the main...

... 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...

.... Significant spatio-temporal patterns are detected in the pressure distribution. In this paper we present averages and main fluctuations of pressure distributions and of load coefficients for different apparent wind angles as well as a refined analysis of pressure fluctuations, using the Proper Orthogonal...

... development, is also described. pressure strips investigation measurement system pressure tap pressure distribution pressure system configuration wind tunnel test pressure measurement system coefficient politecnico main sail sensor scanner jib THE 22ND CHESAPEAKE SAILING YACHT...