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Numerical Simulation of Dynamic Stall of Consecutive Wind Turbine Blades' Airfoil

Shojaa, Mohammad Ali | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46397 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Taeibi-Rahni, Mohammad
  7. Abstract:
  8. Today energy sources, in any kind, have their special situation in human’s life and we must use our knowledge to manage them for effective usage by decreasing losses and finding modern renewable sources. One of the best way to achieve this purpose is increasing efficiency and improve energy generator performances under different environmental conditions. In spite of the fact that wind turbines stall dynamics behavior is under investigation for 6 years, study of dynamic stall phenomenon especially over series blades still needed. By addition to this phenomenon, improper wind turbine arrange decreases efficiency too. As a matter of fact, scrutiny of dynamics stall of wind turbines serial blades and its damaging consequences in one hand, and optimization of wind turbine blades in another hand could be lead to more effective energy generation process. Hence, numerical simulation of flow over two serial blades in different position is our final goal in this project. In this simulation, the first blade faces to free stream and the second one meet flow which is affected by first turbine blades. At last wind turbine airfoils compared and turbine blades dynamic stall simulated by FLUENT software. In addition, for SST modeling of turbulence, RANS approach was used. Results show reasonable increase in power generation of second wind turbine by increasing distance between two wind turbines and power generation loss decrease from about 12% to 2% when distance between two wind turbine increases from 2R to 4R
  9. Keywords:
  10. Stalling ; Wind Turbine ; Turbulent Flow ; Airfoil ; Dynamic Stall

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