Sökning: "blade element momentum BEM"

Hittade 5 uppsatser innehållade orden blade element momentum BEM.

  1. 1. Propulsion modelling of a generic submarine propeller

    Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Gustav Boman; [2023]
    Nyckelord :OpenFOAM; CFD; actuator line model; rotor disk; actuator disk; INSEAN E1619; propeller;

    Sammanfattning : Self propulsion modelling is important in order to accurately simulate ships and submarinesusing Computational Fluid Dynamics (CFD). However, fully resolved simulations of hull andpropeller geometries are computationally heavy and time consuming. As such there is a greatinterest in lower order CFD models of propellers. LÄS MER

  3. 2. Performance analysis of a small-scalewind turbine at variable pitch and withpitch unbalance

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :Francesco Mazzeo; [2021]
    Nyckelord :Wind energy; wind turbine; pitch angle; pitch unbalance; Blade Element Momentum BEM theory; Computational Fluid Dynamics CFD ; wind tunnel experiments; oscillations;

    Sammanfattning : When it comes to design a wind turbine rotor, several parameters have to be taken into account. The present work focuses on the inclination of the blades with respect to the rotor plane, namely the pich angle. LÄS MER

  4. 3. Validation of a vortex panel method for aerodynamics and aero-elasticity of Wind Turbine

    Master-uppsats, KTH/Kraft- och värmeteknologi

    Författare :Antoine Thibierge; [2018]
    Nyckelord :;

    Sammanfattning : Ardema3D is a new type of vortex free model code that can simulate wind turbines. This code has been developed in order to replace the state of the art model, the blade element momentum (BEM). LÄS MER

  5. 4. Aerodynamisk optimering av vindkraftverks rotorblad med en genetisk algoritm, BEM-teori, och XFOIL

    Kandidat-uppsats, KTH/Industriell ekologi

    Författare :Max Berggren; [2014]
    Nyckelord :;

    Sammanfattning : This study presents a methodology that enables the annual average power of a wind turbine to be increased by automatically optimizing it’s airfoil, twist and chord dis- tribution. As a part of the study the software SiteOpt has been developed. This software connects the open source software XFOIL with the blade element momen- tum theory. LÄS MER

  7. 5. Investigating CVT as a Transmission System Option for Wind Turbines

    Master-uppsats, KTH/Energiteknik; KTH/Kraft- och värmeteknologi

    Författare :Deniz Alkan; [2013]
    Nyckelord :Continuously variable transmission CVT ; wind turbine drive train; blade element momentum BEM ; frequency control of wind turbines; power electronics;

    Sammanfattning : In this study, an innovative solution is examined for transmission problems and frequency control for wind Turbines. Power electronics and the gear boxes are the parts which are responsible of a significant amount of failures and they are increasing the operation and maintenance cost of wind turbines. LÄS MER