Analysis of Blades Surface Effect on Wind Turbine Performance

Sabzehparvar, Amir Ali | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 47838 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Mechanical Engineering-Energy Conversion
  6. Advisor(s): Sadr Hosseini, Hani; Sabzehparvar, Mahdi
  7. Abstract:
  8. The development of wind turbine blades model that accurately predict wind turbine thrust in a full range of applicable wind speed has provided a powerful and reliable source for simulation of horizontal axis wind turbine power and thrust force that serves as a valuable tool for wind turbine design and performance analysis. A single-element blade model that reduces the rotor blade characteristics to a lift and drag coefficient vs. angle-of-attack formulation was found to describe accurately the rotor characteristics over a wide operating range. Measurements of wind speed and altitude of wind turbine installation location, rotor speed, and provided thrust is within less than 2% over a wide range of advance ratios. With an accurate model of online thrust measurement, one could add a new page on wind turbine to display the amount of available thrust for the operator or engineers or autopilot system, which would have a great impact on both the capability of verifying wind turbine performance and more accurate data for design optimization procedures. Lock’s method was conducted to model a three bladed wind turbine using NACA4412 airfoil. Computed thrust at various wind speed range was compared with the results of a simulation model using computational model to predict aerodynamic model and thrust calculations in a diverse range of wind speeds. Two different blade platforms was introduced by means of keeping blade area constant and blade radius was changed within ±10% of its original values which produced 26% increase in thrust production and 21% decrease in output thrust value, respectively
  9. Keywords:
  10. Wind Turbine ; Modeling ; Horizontal Axis Wind Turbine (HAWT) ; Blade Surface ; Lock Method

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