Sökning: "Large Eddy Simulation"

Visar resultat 21 - 25 av 41 uppsatser innehållade orden Large Eddy Simulation.

  1. 21. Large Eddy Simulation of Turbulent Flow over a Backward-Facing Step

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Edmond Shehadi; [2018]
    Nyckelord :;

    Sammanfattning : This work studies the effect of grid resolution and subgrid scale modeling on the predictive accuracy of Large Eddy Simulation. In particular, the problems considered are: turbulent flow over a backward-facing step and fully-developed turbulent channel flow. LÄS MER

  3. 22. VIBRATION ANALYSIS OF THE FLUE GAS FAN IN MÄLARENERGI’S UNIT 6 : Troubleshooting using CFD simulations in ANSYS to locate the origin of the vibration spikes and suggest solutions for a more optimized performance

    Master-uppsats, Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

    Författare :Felix Brogren; Peter Gustafsson; [2018]
    Nyckelord :Troubleshoot; CFD simulation; spectrum analysis; flow-induced vibration; vibrations in machinery; Felsökning; CFD-simulering; spektrum analys; flödesinducerad vibration; vibrationer i maskiner;

    Sammanfattning : The purpose of this study is to investigate the flue gas fan in Mälarenergi’s Unit 6 and try to find what is causing the vibrations increase. The Fast Fourier transform (FFT) method was used for this degree project. A comparison was made with previous studies using FFT in order to pinpoint the source of the problem with vibrations. LÄS MER

  4. 23. 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. 24. Improvement of RANS Forest Model via Closure Coefficient Modification

    Magister-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Geoffrey DeSena; [2017]
    Nyckelord :wind; turbulence; forest; model; RANS; Lopes; closure; WindSim;

    Sammanfattning : As wind farms continue to take up more land throughout Northern Europe, developers are looking to sparsely populated areas, particularly in northern Fennoscandia, which hosts strong winds but also mixed and patchy forests over complex terrain. The complexity makes wind resource assessments difficult, raising uncertainty and therefore cost. LÄS MER

  7. 25. LES Simulation of Hot-wire Anemometers

    Magister-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Assiye Süer; [2017]
    Nyckelord :Hot-wire anemometer; Hot-film anemometer; Computational Fluid Dynamics; Mars Science Laboratory; MSL; Mars; Large Eddy Simulations; LES; Reynolds-Averaged Navier–Stokes equations; RANS;

    Sammanfattning : Hot wire anemometers have been used in several wind velocity sensors deployed in Mars. They are based in keeping the temperature of a surface at a constant value, above the ambient. This is done by means of a heater controlled with an electronic system. LÄS MER