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Keywords: hydrofoil
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Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3218
... ABSTRACT In this paper, the tip-vortex cavitation of NACA0009 hydrofoil is simulated at three tip clearances and one foil incidence angle. Two RANS turbulence models and LES sub-grid model are used in simulations. The key characteristics, including cavity trajectory, cavity shape, velocity and...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3224
... The main attention of present work is to investigate the ability of a adaptive mesh ganeration method in accurate cavitation simulation. A numerical study of the cavitation around NACA66 hydrofoil has been carried out. The simulation results such as cavitation shape, the lift coefficient C L...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-356
... hydrofoil using the finite volume method. The results showed that the ventilation parameters affect the evolution of cavitation, and increasing the aeration can help to form periodic cavitation flow. Mäkiharju et al. (2015) studied the influence of noncondensable gases on the evolution of cloud cavitation...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-401
... ABSTRACT The VIScous Vorticity Equation (VISVE) method has already been applied to solve the laminar flow around a cylinder and a hydrofoil at low Reynolds numbers. This method is more computationally efficient and spatially compact than a viscous flow method based on primitive variables...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-038
... ABSTRACT In order to study the inhibition effects of placed obstacles and control mechanism of the re-entrant jet on the generation of the cloud cavitation, numerical simulations are performed on elliptic nose hydrofoils equipped with and without obstacles. A new modified stabilized SST k-ω...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-019
... ABSTRACT The present work focuses on the comparison of the numerical simulation of sheet/cloud cavitation with RANS and LES method around NACA0012 hydrofoil. Three kinds of turbulence models -- SST k-ω, modified SST k-ω and Smagorinsky model are used in this paper. The unstable sheet cavity...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-039
... ABSTRACT In this paper, we use modified RNG k-ε turbulent model and homogeneous equilibrium method to numerically study unsteady cavitating flows around two-dimensional NACA0012 hydrofoil. In order to find a way to efficiently suppress the cavitation on the hydrofoil surface, we propose two...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-462
... ABSTRACT The vortex shedding was simulated by viscous CFD technique when the linearly stratified fluid past a hydrofoil at a constant speed. Based on thermal density current model, the linear stratification of density was achieved by specifying the distribution of temperature. The RANS method...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-049
... ABSTRACT In the present work, the development of sheet cavitation and the shedding of cloud cavitation around hydrofoil NACA0015 are simulated in RANS and LES method. Three kinds of turbulence models -- SST k-omega, modified SST k-omega and Smagorinsky model are used in this paper. The...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-397
... ABSTRACT Since 2012, our group has been studying the dual flapping tidal turbine and has developed its scaled-prototype for experimental studies through two phases. In the first phase, the prototype was designed to have vertical flapping-plane with the right-swing in the front hydrofoil and...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-255
... ABSTRACT Wave propulsion device (WPD) is a device that can directly absorb wave energy and convert it into forward thrust by using an oscillating hydrofoil. The concept of WPD has been proposed for many years and has been proved to be feasible as the dominating or assistant propulsion of ships...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-317
... in waves or reduction of mooring force of an ocean floating structure. By installing a fixed or active pitch controlled hydrofoil at ship's bow, in addition to producing thrust, the foil can also reduce ship motions (Naito et al., 2005; Bøckmann et al., 2013; Belibassakis and Politis, 2013, 2016...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-088
... ABSTRACT An experimental study was conducted to characterize the vibrations of a hydrofoil-rod system at a chord Reynolds number up to Re c = 8.8 × 10 6 . Measurements are performed for a steel NACA 0017 model with a uniform section at angles of attack AOA ranging from 5° to 12°. The...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-022
... Abstract An optimization approach from hydrofoil to blade has been developed and the CFD analysis for the optimum horizontal axis marine current turbine has been carried out as well. Xfoil is applied for 2D hydrofoil analysis. It combines with Matlab under a frame of Genetic Algorithm (GA) to...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-077
... predicted. The numerical method to predict isotropic turbulence integral length is validated using the experimental data from a 2-D hydrofoil, and the average error is 6.81%; and the numerical method to predict the anisotropic turbulence integral length is validated by wind tunnel test. Then the anisotropic...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-315
... Abstract Wave devouring propulsion system (WDPS) is a device that can directly absorb wave energy and convert it into forward thrust by using an oscillating hydrofoil. In this paper, a new WDPS concept that comprises a pair of inversely oscillating hydrofoils is preliminarily investigated by a...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-414
... motions of the trimaran in waves. flow field experimental data hydrofoil numerical result trimaran hydrodynamic performance university foil clam water ship motion calculation regular wave simulation resistance calculation resistance free surface numerical simulation motion response...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-061
... Abstract The study focuses on the shape design and numerical analysis of a 1MW horizontal axis tidal current turbine (HATCT), for the southwest regions of Korea. The hydrodynamic performance including the lift and drag forces, is conducted using an open source code of X-Foil. The new hydrofoil...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-324
... a pseudo elastic problem so as to minimize mesh distortion. With the numerical method described above, free surface flows around 2D NACA0012 hydrofoil under different Froude numbers, submerged depths and attack angles are systematically investigated, respectively. velocity magnitude...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-388
... decay identification hydrofoil artificial intelligence test result marine transportation mathematical model equation university Research on the System Identification Method of Rolling Motion of Composite Trimaran Feng Zhu , Songlin Yang, Shuling Chen and Huilei.Li Jiangsu University of...

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