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Energy Extraction from Two Oscillating Airfoils in Tandem Configuration at Low-Reynolds-number Turbulent Flow

Alapour, Sina | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54248 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Ebrahimi, Abbas
  7. Abstract:
  8. In this study, the physic of an unsteady flow surrounding two oscillating airfoils in tandem configuration at low Reynolds-numbers has been simulated in a 2D manner by utilizing the Sliding-mesh approach and K-ω-SST turbulent model in Ansys-Fluent application. The first step in this study is selecting the decent numerical grid and flow solution scheme. After choosing the proper solution for this problem, next is to verify the methodology with respect to the references. In the next step, The tandem configuration and pitching motion of the airfoils is being implemented with existing tools and the flow structure, leading-edge and trailing-edge vortex shedding and blade-vortex interactions is being studied in different configurations of reduced frequency, stagger and phase difference parameters. Lastly the compact of the said parameters is being studied with respect to flow performance and the effects on each other. The results demonstrated the dependence of the reduced frequency, stagger and phase difference on each other thus requiring the definition of a comprehensive parameter based on the said effective parameters for better studying of the target configurations
  9. Keywords:
  10. Numerical Simulation ; Vortex Interaction ; Leading Edge Vortex ; Trailing Edge Vortex ; Oscillating Hydrofoils ; Low Reynolds Number

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