Design Study of Horizontal Axis Tidal Turbine Blade

Siddharth Kulkarni, Craig Chapman, Hanifa Shah, Erika Parn, Edwards John David

Research output: Contribution to journalArticle

Abstract

A design study was conducted to understand the implications of bio-mimicking a curved caudal fin type horizontal axis tidal turbine blade design, using National Advisory Committee for Aeronautics (NACA) 0018 is presented. A method of transforming the traditional horizontal axis tidal turbine by defining a third order polynomial center line on which the symmetrical airfoils were stationed is also disclosed. Each of the airfoil characteristics: twist angle distribution, chord lengths, and a center line passing through the airfoil centers were automatically transformed to create the curved caudal fin-shaped blade; translating the spinal blade axis into percentage wise chord lengths, using NACA 0018 airfoil. A 3D mesh independency study of a straight blade horizontal axis tidal turbine modeled using computational fluid dynamics (CFD) was carried out. The grid convergence study was produced by employing two turbulence models, the standard k-ε model and shear stress transport (SST) in ANSYS CFX. Three parameters were investigated: mesh resolution, turbulence model, and power coefficient in the initial CFD, analysis. It was found that the mesh resolution and the turbulence model affect the power coefficient results. The power coefficients obtained from the standard k-ε model are 15% to 20% lower than the accuracy of the SST model. Further analysis was performed on both the designed blades using ANSYS CFX and SST turbulence model. The results between the straight blade designed according to literature and the caudal fin blade showed a maximum power coefficient of 0.4028%, and 0.5073% respectively for 2.5m/s inlet velocity.
Original languageEnglish
Pages (from-to)12-34
Number of pages23
JournalMindanao Journal of Science and Technology
Volume15
Publication statusPublished - 19 Mar 2018
Externally publishedYes

Fingerprint

Turbulence models
Airfoils
Turbomachine blades
Turbines
Shear stress
Aviation
Computational fluid dynamics
Dynamic analysis
Polynomials

Keywords

  • design study
  • horizontal axis tidal turbine
  • bio-mimicry
  • SST turbulence model
  • NACA 0018

Cite this

Kulkarni, S., Chapman, C., Shah, H., Parn, E., & David, E. J. (2018). Design Study of Horizontal Axis Tidal Turbine Blade. Mindanao Journal of Science and Technology, 15, 12-34.

Design Study of Horizontal Axis Tidal Turbine Blade. / Kulkarni, Siddharth; Chapman, Craig; Shah, Hanifa; Parn, Erika ; David, Edwards John .

In: Mindanao Journal of Science and Technology, Vol. 15, 19.03.2018, p. 12-34.

Research output: Contribution to journalArticle

Kulkarni, S, Chapman, C, Shah, H, Parn, E & David, EJ 2018, 'Design Study of Horizontal Axis Tidal Turbine Blade' Mindanao Journal of Science and Technology, vol. 15, pp. 12-34.
Kulkarni, Siddharth ; Chapman, Craig ; Shah, Hanifa ; Parn, Erika ; David, Edwards John . / Design Study of Horizontal Axis Tidal Turbine Blade. In: Mindanao Journal of Science and Technology. 2018 ; Vol. 15. pp. 12-34.
@article{7c36e25ee62f40c6a05090b07a5ca608,
title = "Design Study of Horizontal Axis Tidal Turbine Blade",
abstract = "A design study was conducted to understand the implications of bio-mimicking a curved caudal fin type horizontal axis tidal turbine blade design, using National Advisory Committee for Aeronautics (NACA) 0018 is presented. A method of transforming the traditional horizontal axis tidal turbine by defining a third order polynomial center line on which the symmetrical airfoils were stationed is also disclosed. Each of the airfoil characteristics: twist angle distribution, chord lengths, and a center line passing through the airfoil centers were automatically transformed to create the curved caudal fin-shaped blade; translating the spinal blade axis into percentage wise chord lengths, using NACA 0018 airfoil. A 3D mesh independency study of a straight blade horizontal axis tidal turbine modeled using computational fluid dynamics (CFD) was carried out. The grid convergence study was produced by employing two turbulence models, the standard k-ε model and shear stress transport (SST) in ANSYS CFX. Three parameters were investigated: mesh resolution, turbulence model, and power coefficient in the initial CFD, analysis. It was found that the mesh resolution and the turbulence model affect the power coefficient results. The power coefficients obtained from the standard k-ε model are 15{\%} to 20{\%} lower than the accuracy of the SST model. Further analysis was performed on both the designed blades using ANSYS CFX and SST turbulence model. The results between the straight blade designed according to literature and the caudal fin blade showed a maximum power coefficient of 0.4028{\%}, and 0.5073{\%} respectively for 2.5m/s inlet velocity.",
keywords = "design study, horizontal axis tidal turbine, bio-mimicry, SST turbulence model, NACA 0018",
author = "Siddharth Kulkarni and Craig Chapman and Hanifa Shah and Erika Parn and David, {Edwards John}",
year = "2018",
month = "3",
day = "19",
language = "English",
volume = "15",
pages = "12--34",
journal = "Mindanao Journal of Science and Technology",
issn = "2244-0410",

}

TY - JOUR

T1 - Design Study of Horizontal Axis Tidal Turbine Blade

AU - Kulkarni, Siddharth

AU - Chapman, Craig

AU - Shah, Hanifa

AU - Parn, Erika

AU - David, Edwards John

PY - 2018/3/19

Y1 - 2018/3/19

N2 - A design study was conducted to understand the implications of bio-mimicking a curved caudal fin type horizontal axis tidal turbine blade design, using National Advisory Committee for Aeronautics (NACA) 0018 is presented. A method of transforming the traditional horizontal axis tidal turbine by defining a third order polynomial center line on which the symmetrical airfoils were stationed is also disclosed. Each of the airfoil characteristics: twist angle distribution, chord lengths, and a center line passing through the airfoil centers were automatically transformed to create the curved caudal fin-shaped blade; translating the spinal blade axis into percentage wise chord lengths, using NACA 0018 airfoil. A 3D mesh independency study of a straight blade horizontal axis tidal turbine modeled using computational fluid dynamics (CFD) was carried out. The grid convergence study was produced by employing two turbulence models, the standard k-ε model and shear stress transport (SST) in ANSYS CFX. Three parameters were investigated: mesh resolution, turbulence model, and power coefficient in the initial CFD, analysis. It was found that the mesh resolution and the turbulence model affect the power coefficient results. The power coefficients obtained from the standard k-ε model are 15% to 20% lower than the accuracy of the SST model. Further analysis was performed on both the designed blades using ANSYS CFX and SST turbulence model. The results between the straight blade designed according to literature and the caudal fin blade showed a maximum power coefficient of 0.4028%, and 0.5073% respectively for 2.5m/s inlet velocity.

AB - A design study was conducted to understand the implications of bio-mimicking a curved caudal fin type horizontal axis tidal turbine blade design, using National Advisory Committee for Aeronautics (NACA) 0018 is presented. A method of transforming the traditional horizontal axis tidal turbine by defining a third order polynomial center line on which the symmetrical airfoils were stationed is also disclosed. Each of the airfoil characteristics: twist angle distribution, chord lengths, and a center line passing through the airfoil centers were automatically transformed to create the curved caudal fin-shaped blade; translating the spinal blade axis into percentage wise chord lengths, using NACA 0018 airfoil. A 3D mesh independency study of a straight blade horizontal axis tidal turbine modeled using computational fluid dynamics (CFD) was carried out. The grid convergence study was produced by employing two turbulence models, the standard k-ε model and shear stress transport (SST) in ANSYS CFX. Three parameters were investigated: mesh resolution, turbulence model, and power coefficient in the initial CFD, analysis. It was found that the mesh resolution and the turbulence model affect the power coefficient results. The power coefficients obtained from the standard k-ε model are 15% to 20% lower than the accuracy of the SST model. Further analysis was performed on both the designed blades using ANSYS CFX and SST turbulence model. The results between the straight blade designed according to literature and the caudal fin blade showed a maximum power coefficient of 0.4028%, and 0.5073% respectively for 2.5m/s inlet velocity.

KW - design study

KW - horizontal axis tidal turbine

KW - bio-mimicry

KW - SST turbulence model

KW - NACA 0018

M3 - Article

VL - 15

SP - 12

EP - 34

JO - Mindanao Journal of Science and Technology

JF - Mindanao Journal of Science and Technology

SN - 2244-0410

ER -