Computational Fluid Dynamics and Experimental Analysis of a Wind Turbine Blade’s Frontal Section with and without Arrays of Dimpled Structures

Shahid Aziz, Abdullah Khan, Imran Shah, Tariq Amin Khan, Yasir Ali, Muhammad Umer Sohail, Badar Rashid and Dong Won Jung ()
Additional contact information
Shahid Aziz: Department of Mechanical Engineering, Jeju National University, 102 Jejudaehak-ro, Jeju-Si 63243, Korea
Abdullah Khan: Department of Mechanical Engineering, National University of Technology, Islamabad 44000, Pakistan
Imran Shah: Department of Aerospace Engineering, College of Aeronautical Engineering, National University of Sciences and Technology, Risalpur 24090, Pakistan
Tariq Amin Khan: Department of Aerospace Engineering, College of Aeronautical Engineering, National University of Sciences and Technology, Risalpur 24090, Pakistan
Yasir Ali: Department of Aerospace Engineering, College of Aeronautical Engineering, National University of Sciences and Technology, Risalpur 24090, Pakistan
Muhammad Umer Sohail: Department of Aeronautics and Astronautics Engineering, Institute of Space Technology, Islamabad 44000, Pakistan
Badar Rashid: Department of Mechanical Engineering, National University of Technology, Islamabad 44000, Pakistan
Dong Won Jung: Department of Mechanical Engineering, Jeju National University, 102 Jejudaehak-ro, Jeju-Si 63243, Korea

Energies, 2022, vol. 15, issue 19, 1-15

Abstract: Horizontal axis wind turbines are used for energy generation at domestic as well as industrial levels. In the wind turbines, a reduction in drag force and an increase in lift force are desired to increase the energy efficiency. In this research work, computational fluid dynamics (CFD) analysis has been performed on a turbine blade’s frontal section with an NACA S814 profile. The drag force has been reduced by introducing an array of dimpled structures at the blade surface. The dimpled structures generate a turbulent boundary layer flow on its surface that reduces the drag force and modifies the lift force because it has greater momentum than the laminar flow. The simulation results are verified by the experimental results performed in a wind tunnel and are in close harmony with the simulated results. For accurate results, CFD is performed on the blade’s frontal section at the angle of attack (AOA) with a domain of 0° to 80° and at multiple Reynolds numbers. The local attributes, lift force, drag force and pressure coefficient are numerically computed by using the three models on Ansys fluent: the Spalart-Allmaras, the k-epsilon (RNG) and the k-omega shear stress transport (SST).

Keywords: computational fluid dynamics; lift & drag coefficient; turbine blade; dimpled section; airfoil; Reynolds number (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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