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Hittade 3 uppsatser som matchar ovanstående sökkriterier.

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

    Master-uppsats, KTH/Mekanik

    Författare :Emelie Trigell; [2018]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 2. Establishment of an open 3D steam turbine flutter test case

    Master-uppsats, KTH/Energiteknik

    Författare :Di Qi; [2016]
    Nyckelord :;

    Sammanfattning : An open three-dimensional (3D) flutter test case for steam turbines is presented. Unlike previous research on turbine flutter, the geometry is an open resource and is from a test case originally presented by Durham University. LÄS MER

  4. 3. CFD computations of hydropower plant intake flow using unsteady RANS

    Master-uppsats, KTH/Kraft- och värmeteknologi

    Författare :Lovisa Nöid; [2015]
    Nyckelord :CFD; Vortex; URANS; Hydropower;

    Sammanfattning : At the intake of hydropower plants, air-core vortex formation is known to cause severe damage. In order to study how to prevent and reduce the origin of the vortex, Vattenfall has built a scale model of the Akkats hydropower plant dam, where scale testing is possible. LÄS MER