Razieh Hamedi

 

Ph. D.: Energy Engineering, K. N. Toosi University of Technology

 

M. Sc.: Mechanical Engineering, K. N. Toosi University of Technology

 

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Ph. D. Thesis

• Title: Not-Defined!.
• Advisor: Dr. Farschad Torabi.
• Expected Graduation Date: 2020

M. Sc. Thesis

• Title: Calculation of Velocity Profile in Different Distances behind Horisontal-axis Wind Turbines Affected Turbulent Flows for Achieving their Optimized Layout in Wind Farm and Maximum Power.
• Advisor: Dr. Farschad Torabi.
• Graduation Date: ? / ? / 2015
• Abstract
  The main objective of the present thesis is proposing an analytical model for calculation of velocity profile behind the wind turbines using turbulence models. For this reason, eddy viscousity model and similarity solution method for solving Navier-Stokes equations are used. In this thesis, velocity profile just behind the blades of wind turbines are calculated using blade element momentum method. Then by considering a third order polynomial profile with unknown coefficients behind the nacelle and solving continuity and momentum equations, boundary condition, condition of symmetry and zero curvature condition at the end of nacelle, unknown coefficients and thus the third order polynomial profile is specified. Thus velocity profile just behind the wind turbines is calculated and the mass flow rate crossing the turbine can be calculated numerically. In the next step, an exponential profile multiplied with parabolic polynomial with two unknown coefficients in different distances behind the wind turbines are considered, in which the Reynolds stress term related to turbulent flow in Navier-Stokes equations have been considered. Then by using continuity equation and boundary condition of undisturbed velocity at the end point of wake radius, the unknown coefficients are calculated. By using the velocity profile in different distances behind the wind turbines, the mean velocity and thus the velocity profile and power of down-wind turbines in wind farms are calculated.

B. Sc. Thesis

• Graduation Date: September 16, 2012

Memorial Events

• K. N. Toosi Mechanical Engineering Reunion, 2016

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