Numerical Simulation of Free-Surface Flows around 3-D Submerged Hydrofoil by N-S Solver

Kwag, Seung-Hyun; Mori, Kohji

doi:10.2534/jjasnaoe1968.1991.170_93

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…Salvesen and von Kerczek 28 estimated steady nonlinear free-surface waves due to a 2-D hydrofoil and a point vortex under the free surface by a finite difference iterative technique. Kwag and Mori 29 used N-S solver to investigate the flow characteristics of 3-D submerged hydrofoil with free surface. Kouh 30 calculated wave elevation of NACA 4412 hydrofoil at 5° angle of attack (AOA) at Froude number of 1 and Reynolds number of 2.79 × 10 5 .…”

Section: Introductionmentioning

confidence: 99%

The hydrodynamic analysis of multiple hydrofoils translating in tandem in presence of a free surface

Kumari

Chakraborty

Jangam

2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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Hydrofoils find its presence in various engineering applications including high speed marine crafts, blades of hydro-kinetic turbines etc. So, depending on the type of marine application, the foils are arranged in different complex arrangements (i.e. in line, or in tandem) that can alter flow dynamics of the working fluid flowing around them. In order to design efficient marine propulsion systems, it is important to study the effect of different arrangements of hydrofoil systems on its hydrodynamic characteristics (lift, drag, pressure coefficient, velocity contour, etc). In this study, the numerical simulation of fluid flow over a tandem hydrofoils is carried out in presence of a free surface. The present study is limited for a constant Reynolds number of 166,784.8, and at a Froude number of 0.57. The unsteady RANS equations are solved using the volume of fluid (VOF) method embedded in commercial software STAR-CCM+ incorporating [Formula: see text] turbulence model. The first part of the study focuses on varying spacing ratios ( l/ c) that range from 0.1 to 4. In the second part of the study, the angle of attack of the downstream hydrofoil was varied over zero degrees to stall keeping the upstream hydrofoil at a zero degree angle of attack. For both studies, pressure and velocity distributions, lift as well as drag coefficients were evaluated. It is concluded that the presence of a free surface in a close proximity to the foils, different spacing between the hydrofoils, and varying angle of attacks of the downstream hydrofoil have significant effects on the overall performance.

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Section: Introductionmentioning

confidence: 99%

The hydrodynamic analysis of multiple hydrofoils translating in tandem in presence of a free surface

Kumari

Chakraborty

Jangam

2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…Hino (1988) solved twodimensional Navier-Stokes (N-S) and Euler equations with the nonlinear free surface conditions and reviewed on the submerged advancing hydrofoil by calculating the lift and drag forces. Kwag and Mori (1991) applied N-S solver to investigate the flow characteristics of three-dimensional submerged hydrofoil with free surface. Hino (1993) also introduced the finite-volume method with an unstructured grid for free surface flow simulations.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of free surface flows around shallowly submerged hydrofoil by OpenFOAM

Prasad¹,

Hino²,

Suzuki³

2015

Ocean Engineering

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“…With the rapid progress and gradual maturity of the flow theory, theoretical method for FSI is developed during recent years. 11 On the basis of hydro elasticity theory, the inertia force of the structure and the hydrodynamics of the fluid are considered as an integral system to describe the interaction. S Denis and W Pierson 12 propose the statistical definition of the wave effect in flow field and provided theoretical foundation for the dynamical motion of ship.…”

Section: Introductionmentioning

confidence: 99%

Numerical calculation and experimental research on the ship dynamics of the fluid–structure interaction

Huang

Yan

Zhang

2018

Advances in Mechanical Engineering

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Accurate predictive method for ship dynamic is a keynote precondition for structural design and an important consideration for strength evaluation. A wave-ship coupling model focusing on the estimating of ship dynamics is numerically established to solve the fluid-structure interaction. Numerical calculation based on the presented algorithm is carried out, and the dynamical response for both ship and fluid is thus investigated with MATLAB. The dynamical responses including the structural force, deformation, velocity, and energy with different ship mass and stiffness are obtained. Experiment is conducted in the towing tank to investigate the peak frequency and transient amplitude with different wave speeds. It is found that the ship dynamics is closely related to the quality and stiffness of the structure, as well as the wave velocity of the fluid. An appropriate estimating method for ship dynamics is thus proposed through series of discussion on numerical results and experimental data.

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Numerical Simulation of Free-Surface Flows around 3-D Submerged Hydrofoil by N-S Solver

Cited by 4 publications

References 7 publications

The hydrodynamic analysis of multiple hydrofoils translating in tandem in presence of a free surface

The hydrodynamic analysis of multiple hydrofoils translating in tandem in presence of a free surface

Numerical simulation of free surface flows around shallowly submerged hydrofoil by OpenFOAM

Numerical calculation and experimental research on the ship dynamics of the fluid–structure interaction

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