Search for dissertations about: "blade element momentum method"

Showing result 1 - 5 of 9 swedish dissertations containing the words blade element momentum method.

  1. 1. Numerical computations of wind turbine wakes and wake interaction Optimization and control

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Karl Nilsson; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Actuator disc method; Actuator line method; Blade element momentum method; Wind turbine wake; Wake interaction; CFD; LES; EllipSys3D;

    Abstract : In the present thesis the wake flow behind wind turbines is analyzed numerically using large-eddy simulations. The wind turbine rotors are modeled by using either the actuator disc method or the actuator line method in which the blades are represented by body forces computed with airfoil data. READ MORE

  2. 2. Wind-turbine wake flows - Effects of boundary layers and periodic disturbances

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Ylva Odemark; KTH.; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wind power; wind-turbine model; wind tunnel; porous disc; hot-wire anemometry; particle image velocimetry; blade element momentum method; large eddy simulations; actuator disc method;

    Abstract : The increased fatigue loads and decreased power output of a wind turbine placed in the wake of another turbine is a well-known problem when building new wind-power farms and a subject of intensive research. These problems are caused by the velocity gradients and high turbulence levels present in the wake of a turbine. READ MORE

  3. 3. Development of Vortex Filament Method for Aerodynamic Loads on Rotor Blades

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Hamidreza Abedi; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; free wake; aerodynamic load; wind turbine; vortex lattice method; rotor blade; lifting surface; prescribed wake; lifting line;

    Abstract : Wind power is currently one of the most reliable new energy sources serving as an alternative tofossil fuel generated electricity and is known as a widely distributed clean and renewable sourceof energy. It is now the world’s fastest growing energy source and has also become one of themost rapidly expanding industries. READ MORE

  4. 4. Development of Vortex Filament Method for Wind Power Aerodynamics

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Hamidreza Abedi; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; unsteady aerodynamic load; atmospheric turbulence; fatigue loads; Free wake model; forest canopy; wind turbine; vortex method; large-eddy simulation;

    Abstract : Wind power is currently one of the cleanest and widely distributed renewable energy sources serving as an alternative to fossil fuel generated electricity. Exponential growth of wind turbines all around the world makes it apt for different research disciplines. READ MORE

  5. 5. Numerical computations of wind turbine wakes

    University dissertation from Stockholm : KTH

    Author : Stefan S. A. Ivanell; KTH.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Applied mechanics; Wind Energy; Wind Turbine; Wake; Circulation; Vortex; CFD; EllipSys3D; Actuator line; Teknisk mekanik; TECHNOLOGY Engineering mechanics; TEKNIKVETENSKAP Teknisk mekanik;

    Abstract : Numerical simulations using CFD methods are performed for wind turbine applications. The aim of the project is to get a better understanding of the wake behaviour, which is needed since today’s industrial design codes for wind power applications are based on the BEM (Blade Element Momentum) method. READ MORE