Investigation of Numerical Hydrodynamic Performance of Deformable Hydrofoil (Applied on Blade Propeller)

Noh Zainal Abidin,Mohd Najib Abdul Ghani Yolhamid,Farizha Ibrahim,Ameer Suhel,Mohamad Abu Ubaidah Amir Abu Zarim,Cédric Leblond

doi:10.7225/toms.v10.n02.012

Abstract

The hydrofoil is a hydro-lifting surface that significantly contributes to marine transportation such as a boat, ship, and submarine for its movement and maneuverability. The existing hydrofoils are in fixed-shaped National Advisory Committee for Aeronautics (NACA) profiles, depending merely on the variation of Angle of Attack (AOA) such as rudder, hydroplane, and propeller blade. This research is concerned with the deformable hydrofoil that aims at modifying its NACA profile rather than its AOA. However, there is still a lack of knowledge about designing an appropriate deformable hydrofoil. Therefore, a numerical investigation of hydrodynamic characteristics for selected hydrofoils was conducted. After undergoing the 2D numerical analysis (potential flow method) at specific conditions, several NACA profiles were chosen based on the performance of NACA profiles. NACA 0017 was selected as the initial shape for this research before it deformed to the optimized NACA profiles, NACA 6417, 8417, and 9517. The 3D CFD simulations using the finite volume method to obtain hydrodynamic characteristics at 0 deg AOA with a constant flow rate. The mesh sensitivity and convergence study are carried out to get consistent, validated, and reliable results. The final CFD modeled for propeller VP 1304 for open water test numerically. The results found that the performance of symmetry hydrofoil NACA 0017 at maximum AOA is not the highest compared to the other deformed NACA profiles at 0 deg AOA. The numerical open water test showed that the error obtained on K.T., K.Q., and efficiency is less than 8% compared to the experimental results. It shows that the results were in good agreement, and the numerical CFD setting can be used for different deformed profiles in the future.

Highlights

Hydrodynamic effects are the fluid interaction with the moving bodies, which is the backbone of designing the hydrofoil for marine vehicles such as ships (L.Birk, 2019)
The number of different 2D NACA profiles will be conducted in XFOIL code numerically
Some NACA profiles will be selected according to the highest hydrodynamic performance characteristics at the turbulence flow condition

Summary

Introduction

Hydrodynamic effects are the fluid interaction with the moving bodies, which is the backbone of designing the hydrofoil for marine vehicles such as ships (L.Birk, 2019). Noh Zainal Abidin et al.: Investigation of Numerical Hydrodynamic Performance of Deformable Hydrofoil (Applied on Blade Propeller) and analysis were carried out to increase lift characteristics and decrease drag characteristics as much as possible. Lift is caused by a pressure difference between the upper and lower surfaces It is different from drag caused by pressure distribution at the leading and trailing edge (pressure drag), and viscous resistance occurred at the wall surface of the airfoil (viscous or friction drag) (Sun, Mao and Fan, 2020). Concerning this hydrodynamic potential, the deformable hydrofoil design should have the features to change the original foil's shape into the different NACA profiles. The ability to deform a propeller blade to maintain optimal propulsive performance for different speeds is technically fascinating

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