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A DOUBLET DISTRIBUTION METHOD FOR PREDICTING THE HYDRODYNAMIC CHARACTERISTICS OF A HYDROFOIL OF FINITE SPAN

Shengpeng Huang, Bo Li

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Abstract

A doublet distribution method has been developed to calculate the hydrodynamic characteristics of a hydrofoil moving beneath the water surface. The surface of the hydrofoil is divided into an adequate number of elements, each of which is replaced by a doublet distribution with constant density. The hydrofoil surface boundary condition is satisfied at the centroid of each element. It is found that good agreement between calculated results and experimental data can be achieved. The calculation method presented in this paper can be used to calculate lift, induced drag and pressure distribution of a hydrofoil at arbitrary Froude number.

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What this paper is about

A doublet distribution method has been developed to calculate the hydrodynamic characteristics of a hydrofoil moving beneath the water surface. The surface of the hydrofoil is divided into an adequate number of elements, each of which is replaced by a doublet distribution with constant density. The hydrofoil surface boundary condition is satisfied at the centroid of each element. It is found that good agreement between calculated results and experimental data can be achieved. The calculation method presented in this paper can be used to calculate lift, induced drag and pressure distribution of a hydrofoil at arbitrary Froude number.

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Available abstract

A doublet distribution method has been developed to calculate the hydrodynamic characteristics of a hydrofoil moving beneath the water surface. The surface of the hydrofoil is divided into an adequate number of elements, each of which is replaced by a doublet distribution with constant density. The hydrofoil surface boundary condition is satisfied at the centroid of each element. It is found that good agreement between calculated results and experimental data can be achieved. The calculation method presented in this paper can be used to calculate lift, induced drag and pressure distribution of a hydrofoil at arbitrary Froude number.

Key concepts: Froude number, Lift (data mining), Mechanics, Distribution (mathematics), Surface (topology), Finite element method, Span (engineering), Drag

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