Sökning: "rotor disk"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden rotor disk.

  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. Forced response numerical investigation of a transonic compressor rotor

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Mariana Pires Gonçalves Toco Dias; [2023]
    Nyckelord :Compressor; rotor; blisk; aeroelasticity; aerodynamic damping; CFD; transient; forced response;

    Sammanfattning : The present thesis discusses the forced response of a rotor’s bladed-disk when excited by the periodic force produced by a wake generator, or Inlet Guide Vane (IGV),with 8 equally-spaced blades. These components are part of an axial transonic compressor rig, moreover the Transonic Compressor Darmstadt 1 (TCD1), located at the Technical University of Darmstadt. LÄS MER

  4. 3. Correlation of numerical simulation methods and failure criteria to experimental burst test

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för byggvetenskaper; Lunds universitet/Hållfasthetslära

    Författare :Karlo Kasljevic; [2020]
    Nyckelord :Gas; Rotor; Turbine; Overspeed; Burst; Test; Strength; Analysis; Failure; Criteria; Burst margin; Stress analysis; Finite element method; Rotating disc; Burst Strength; Turbine disc; turbo-engine disk; Fracture; Blisk; Correlation study; Technology and Engineering;

    Sammanfattning : Predicting the burst speed of turbine rotors is a costly and challenging task. Therefore, the scope of this thesis is to perform a correlation study between numerical simulation methods and failure criteria to experimental over-speed burst test of the Prometheus turbine rotor. LÄS MER

  5. 4. A simplified vortex method for wind turbine simulation

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :Sandro Malusa; [2019]
    Nyckelord :Wind turbine; Vortex model; Numerical wake model; Vortex sheet; Vortex filament; Tjaereborg; Biot-Savart law; Iterative method;

    Sammanfattning : A new vortex model for wind turbines was developed in order to evaluate the loads at the blades and other important characteristics of interest for the wind industry such as power and thrust coefficients. Nowadays, the calculation of these quantaties is done in a reliable and precise manner with LES simulation using actuator line or actuator disk models. LÄS MER

  7. 5. Partially Parabolic Wind Turbine Flow Modelling

    Master-uppsats, KTH/Mekanik

    Författare :Sebastian Haglund El Gaidi; [2018]
    Nyckelord :Wind turbine flow; Single wind turbine; Computational fluid dynamics; Partially parabolic Navier-Stokes equations; Finite difference method.;

    Sammanfattning : Climate change is an evermore urging existential treat to the human enterprise. Mean temperature and greenhouse gas emissions have in-creased exponentially since the industrial revolution. But solutions are also mushrooming with exponential pace. LÄS MER