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Showing 1 to 20 of 35 for “"Hydrofoils"”.
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Shape Optimization of Hydrofoils
… GA) is employed for shape optimization of hydrofoils for application in a sailing craft. The hydrofoil for a sailing craft should have high lift at lower speeds and low drag at higher speeds. Computations are performed for a hydrofoil in deep water as well as one close to the free surface. …
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Numerical Simulations of Supercavitating Propellers and Hydrofoils
… for supercavitating propellers (SCPs) and hydrofoils (SCHs) with non-conventional sectional profiles. The previously developed BEM at the VT Innovative Ship Design Lab (VT-iShip) is extended upon to allow for supercavitating profiles with truncated trailing edges (TE). Both the BEM and the …
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Hydrofoils: design of a wind propelled flying trimaran
Abstract available: p.3-4
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Stress distributions around hydrofoils using computational fluid dynamics
… lowering significantly the drag of a ship when hydrofoils are attached to its hull. The research results are based on CFD analyses using the ADINA software. In order to verify the CFD process, a comparison was made between analytical, experimental and ADINA?s results for a single foil. The …
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Investigating the Effect of an Upstream Spheroid on Tandem Hydrofoils
… prolate spheroid body on tandem pitching hydrofoils. The model is validated by performing separate CFD simulations on the body and pitching hydrofoils and comparing results to existing experimental data. The simulations were run for a range of Strouhal numbers (0.2-0.5) and phase …
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Computational and experimental investigations of the flow around cavitating hydrofoils
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1988.
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A study on the performance of hydrofoils with thick trailing edges
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997.
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An investigation into the design of surface piercing super cavitating hydrofoils
The fluid-dynamic design of hydrofoils to support marine crafts at high speeds has received growing interest in recent years. Physics involved in the design of high-speed surface-piercing hydrofoils is complex involving three different fluid phases (air, water and vapor) and complex fluid dynamic …
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An Investigation of the Hydrodynamic Effects of Enteromorpha clathrata Fouling on Hydrofoils
… determine the effects of biological fouling on hydrofoils. NACA 4412 and 4415 hydrofoil models with 6 inch chord and 8 inch span were used in this study. A water tunnel facility was designed and constructed to perform the tests, and the results were verified using computational fluid dynamic …
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Hydrodynamics of high speed planing hulls with partially ventilated bottom and hydrofoils
… stabilizer has been replaced by supercavitating hydrofoils. Several foil/step configurations were numerically tested. RANSE code is used to evaluate the performance of new hull design with a stepped bottom. Prototypes of the hull have been modeled in 3D using Rhino, NURBS surface modeler. Two …
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An investigation by analysis and experiment of the flutter phenomenon in high speed hydrofoils
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Naval Architecture and Marine Engineering, 1957.
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Design of a high speed planing hull with a cambered step and surface piercing hydrofoils
… a cambered step and stem, surface piercing hydrofoils, commonly known as a Dynaplane hull. This configuration combines the drag reduction benefits of a stepped hull with a fully ventilated after body by using a stem stabilizer. The largest obstacle with this design is maintaining trim …
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Non-linear corrections to the linear theory for the prediction of the cavitating flow around hydrofoils
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1985.
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A time marching boundary element method for the prediction of the flow around surface piercing hydrofoils
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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The application of low aspect ratio hydrofoils to the secure positioning of static equipment in tidal streams.
… lift and drag functions to low aspect ratio hydrofoils with endplates, and a numerical model of distributed surface pressures around a hydrofoil is demonstrated. Subsequently, the concept is evaluated using two 1/7th scale test devices, one is field tested in a large stream under real flow …
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Model testing and computational analysis of a high speed planing hull with cambered planing surface and surface piercing hydrofoils
… A set of super-cavitating, surface-piercing hydrofoils were designed to be attached aft of the vessel transom in order to provide support and prevent re-wetting of the afterbody. The constructed hydrofoils were positioned in a vee configuration, differing from the anhedral design in the …
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An automatic, multi-fidelity framework for optimizing the performance of super-cavitating hydrofoils using Gaussian process regression and Bayesian optimization
Computer automated design of complex physical systems is often limited by the computational resources required for the high precision solvers. Determining an optimum design necessitates high accuracy simulations due to the multi-dimensional design space and the interconnectedness of the constraint …
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Design and Build of a Hydrofoil Boat
… while exploring the functional use of hydrofoils, a small hydrofoil watercraft was designed and built. The hull of the boat is a skiff measuring 14 feet and 5 inches in length and weighing 142 pounds. This hull was designed and built as a platform to support the development of the …
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The Design, Verification, and Validation of a Personal Hydrofoil Craft
… examines the attributes of fully submerged hydrofoils and their prospective advancements. Diverse configurations of fully submerged hydrofoils are scrutinized, accompanied by an exploration of their respective stability characteristics. A comprehensive analysis is conducted on the design …
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Design and assessment of a super high speed, hybrid hydrofoil/SWATH crew boat
… phenomena of conventional super-cavitating hydrofoils (Brizzolara, 2013). The surface piercing configuration of the hydrofoils was adopted in order to make the vessel inherently stable, without the use of control mechanisms. The general design phase was focused on the integration of the …
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