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Numerical Investigation of a Wind Turbine Blade Dynamic Stall in a Dusty Flow

Vaziri Moghaddam, Amir | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57649 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Taeibi Rahni, Mohammad; Salimi, Mohammad Reza
  7. Abstract:
  8. Interaction of vortices with particles is one of the complex and fascinating phenomena in fluid dynamics, which is often observed in wind turbines operating in dusty environments. In these turbines, dynamic stall occurs where vortices continuously form and dissipate. In this study, the impact of the presence of dust particles on dynamic stall, which can noticeably affect the aerodynamic efficiency of wind turbines, has been examined and analyzed; We focus on three airfoil models of the horizontal-axis wind turbines. namely S809, S822, and SD7062 at a Reynolds number of 10^6. These were examined using numerical simulation, with k-ω SST turbulence model and discrete phase model (DPM). The airfoil motion is assumed sinusoidal, oscillating with a specific frequency and amplitude. Here, dynamic mesh was used. The results show that adding particles to the flow changes the size of the vortices and the aerodynamic coefficients. Specifically, for airfoils S809 and S822, with a decrease in Stokes number and an increase in particle accumulation number, the lift coefficient decreases, the drag coefficient increases, and pitching moment coefficient decreases. While, for SD7062 airfoil, a decrease in Stokes number and an increase in particle accumulation number result in a decrease in lift coefficient, an increase in drag coefficient, and an increase in pitching moment coefficient
  9. Keywords:
  10. Dynamic Stall ; Dust ; Horizontal Axis Wind Turbine (HAWT) ; Aerodynamic Coefficient ; Particle Loading Number ; Stokes Number

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