Sökning: "CFD-analysis"

Visar resultat 21 - 25 av 60 uppsatser innehållade ordet CFD-analysis.

  1. 21. CFD Simulations of Unsteady LHA Ship Airwake in OpenFOAM

    Master-uppsats, KTH/Mekanik

    Författare :Matus Cvengros; [2018]
    Nyckelord :;

    Sammanfattning : Extensive research in the past two decades has shown that flow around the sharp edges of bluff bodies, such as the superstructure of a ship, can cause large scale shear-layer separations with increased turbulence, generating a highly unsteady flow in the airwake region. Such separations affect the control margins and handling loading of a rotorcraft, mainly if operating from the vicinity of a flight deck, and therefore negatively influence the rotorcraft operating limits, which is one of the main reasons for the study of ship airwakes. LÄS MER

  3. 22. On Control and stabilisation of floating wind platforms with the help of CFD analysis and the Magnus effect

    Master-uppsats, KTH/Numerisk analys, NA

    Författare :Georg Neumüller; [2017]
    Nyckelord :;

    Sammanfattning : With new technologies and possibilities arising both in the renewable energy sector as well as in the field of Computational Fluid Dynamics, this thesis describes the simulation of vortex- induced vibrations for floating wind turbine platforms. The aim is to control and stabilize floating wind platforms with the help of CFD and the Magnus effect. LÄS MER

  4. 23. CFD Analysis of Pressure Instabilities in Stator-Rotor Disc Cavity Systems

    Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

    Författare :Pedro Santiago Parras Blázquez; [2017]
    Nyckelord :;

    Sammanfattning : The continuous demand to improve turbine performance has led manufactures to focus on aspects that have been previously considered of secondary importance such as the secondary air system. The purpose of this system is to cool the components and prevent ingestion of hot gas into the stator-rotor cavity that could lead to low frequency pressure fluctuations called Cavity Flow Instabilities. LÄS MER

  5. 24. Development of a high flow aerosol sampling device

    Master-uppsats, Lunds universitet/Innovation

    Författare :Saman Souzani; Hamza Licina; [2017]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Small biological airborne particles (aerosols) reside in the atmosphere and can influence human health, the climate and the environment. Whereas aerosol sampling technology is well-known, there is currently no satisfactory high-volume flow impinger for health and atmospheric monitoring applications. LÄS MER

  7. 25. Swing check valvecharacterization: 3D CFDvalidation of one dimensionalmodels used in RELAP5

    Master-uppsats, KTH/Mekanik

    Författare :Giacomo Vavassori; [2017]
    Nyckelord :;

    Sammanfattning : In a previous thesis work a swing check valve was studied with CFD analysisin order to nd correlations that could provide a good input for a onedimensionalmodel of the same. In this document, starting from the previousthesis results and using the model by Li and Liou as the reference work, a checkvalve is investigated and the hydraulic torque coecients identied. LÄS MER