Essays about: "Fluid Mekanik"

Showing result 21 - 25 of 49 essays containing the words Fluid Mekanik.

  1. 21. CFD analysis of stepped planing vessels

    University essay from KTH/Mekanik

    Author : Toni Kokkonen; [2018]
    Keywords : Computational Fluid Dynamics CFD ; Ship hydrodynamics; Planing hull; Stepped hull; STAR-CCM ; Overset mesh; Volume of fluid VOF ; Reynolds averaged Navier-Stokes equations RANS ; Dynamic instabilities;

    Abstract : High speed planing hulls are currently widely used for example in recreational and emergency vessel applications. However, very little CFD research has been done for planing vessels, especially for those with stepped hulls. A validated CFD method for planing stepped hulls could be a valuable improvement for the design phase of such hulls. READ MORE

  3. 22. CFD-simulations of urea-waterspray in an after-treatment systemusing Star-CCM+

    University essay from KTH/Mekanik

    Author : Emelie Trigell; [2018]
    Keywords : after-treatment systems; selective catalytic reaction SCR ; AdBlue; multiphase flow; multi-component liquid; Unsteady Reynolds Average Navier Stokes RANS ; wall film formation; solid deposits; efterbehandlingssystem; selektiva katalytiska reaktioner; AdBlue; flerfasstr ¨ommning; flerkomponentvätska; Unsteady Reynolds Average Navier Stokes; väggfilm; avlagringar;

    Abstract : The legislation has forced the vehicle industry to reduce tail-end emissions. The air pollutant nitrogen oxide (NOX) has been shown to have a negative impact on human health and the environment. One of the key technologies to reduce the levels of NOX emitted from a vehicle is by implementing an after-treatment system. READ MORE

  4. 23. Sensitivity Analysis in 3D Turbine CFD

    University essay from KTH/Mekanik

    Author : Simon Kern; [2017]
    Keywords : ;

    Abstract : A better understanding of turbine performance and its sensitivity to variations in the inletboundary conditions is crucial in the quest of further improving the efficiency of aero engines.Within the research efforts to reach this goal, a high-pressure turbine test rig has been designedby Rolls-Royce Deutschland in cooperation with the Deutsches Zentrum für Luft- und Raumfahrt(DLR), the German Aerospace Center. READ MORE

  5. 24. Aerodynamic performance of a wind-turbine rotor by means of OpenFOAM

    University essay from KTH/Mekanik

    Author : Evangelos Giannopoulos; [2017]
    Keywords : wind turbine; rotor; performance; CFD model; boundary layer; roughness;

    Abstract : In order for wind-farm operators to deal with challenges regarding their fleet management, it is useful for them to estimate their units’ performance for different conditions. To perform such estimations, Computational Fluid Dynamics (CFD) may be used. READ MORE

  6. 25. Experimental Investigation of Hydrodynamic Effects on a Vibrating Kaplan Runner

    University essay from Luleå tekniska universitet/Strömningslära och experimentell mekanik

    Author : Jakob Hedlund; [2017]
    Keywords : FSI; fluid-solid interactions; Kaplan runner; hydrodynamic; added mass; added damping; vibrations;

    Abstract : An experimental investigation of a vibrating Kaplan turbine runner was performed in order to understand the hydrodynamic effects and to obtain or confirm the mass and damping coefficients used for dimensioning at the design stage. Improved design can lead to increased efficiency and lifetime of hydropower stations. READ MORE