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# hydrofoil paper 1

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Essay, Pages 10 (2309 words)

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Essay, Pages 10 (2309 words)

Shape optimization of Hydrofoils to maximize lift and minimize drag Sayan Saha 1, Mainak Lodh 2 and Sayani Sen 3 Department of Mechanical Engineering, Future Institute of Technology , Maulana Abul Kalam University of Technology, Kolkata -700152, India Abstract This paper presents the numerical investigations of water flow over 3D symmetrical and unsymmetrical hydrofoil. Steady flow of water over the hydrofoil s is simulated using the k -µ transport equation -based model. The results focus on change in lift and drag forces as a consequence of change of shape, profile of the foil, angle of attack and flow velocity of water around it.

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The foils are tested at different angles of attack and different velocit ies of flow. Standard k -› model without any modifications are us ed for simplicity. This is done to determine the most efficient foil shape which generates sufficient lift force while producing as little drag force as possible. After determining the most efficient shape, the power required to operate these foils on a bo at was also calculated so as to get an idea of the reduction of required power.

Keywords Hydrofoil, lift, drag, k -µ transport equation, numerical study, Ansys, shape of hydrofoil . Introduction A hydrofoil is simply a wing or a vane placed underneath the hull of a boat, the primary function of which is to lift the hull of the boat out of the water. In doing so, the drag force created by the friction between the hull of the boat and the water is greatly reduced, allowing the boat to travel fa ster while using much less propulsion power.

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