Sökning: "turbulence indices"

Hittade 5 uppsatser innehållade orden turbulence indices.

  1. 1. CFD Study of An Office Room Equipped with Corner Impinging Jet Ventilation

    Master-uppsats, Högskolan i Gävle/Energisystem och byggnadsteknik

    Författare :Getiye Wodaje; [2022]
    Nyckelord :CFD in ventilaion; Thermal comfort; Impinging jet ventilation; thermally stratified flow; Corner impinging jet; Office air quality; Indoor environment; turbulent jet;

    Sammanfattning : A CFD validation study was made using corner supplied impinging jet ventilation operating in cooling mode. The air distribution system has two equilateral triangle shaped inlets placed 80cm above the floor at the two that share a common wall. The supply air was introduced at 2.26m/s. LÄS MER

  3. 2. An analysis of the turbulent properties of a CME

    L3-uppsats, Uppsala universitet/Institutionen för fysik och astronomi; Uppsala universitet/Institutet för rymdfysik, Uppsalaavdelningen

    Författare :Roque Márquez Rodríguez; [2022]
    Nyckelord :CME; turbulence; plasma; solar wind; MHD;

    Sammanfattning : Spectral indices and flatness scaling exponents corresponding to solar wind plasma measurements before, during and after a coronal mass ejection (CME) detected by NASA's Wind spacecraft on September 2014 have been obtained. The Politano-Pouquet (PP) law for isotropic and incompressible magnetohydrodynamic (MHD) turbulence has been validated over a series of selected time intervals. LÄS MER

  4. 3. Numerical evaluation of the ground vortex

    Master-uppsats, KTH/Teknisk mekanik

    Författare :Martin Babo; [2022]
    Nyckelord :Turbofan engine; CFD; Flow simulation; Ground Vortex; External aerodynamics;

    Sammanfattning : This master thesis covers the realization of a CFD calibration study regarding the numerical simulation of the ground vortex phenomenon. As part of InVIGO project (EU CleanSky2), wind tunnel test campaigns were performed using a nacelle model combined with a movable raised floor. LÄS MER

  5. 4. A climatological study of Clear Air Turbulence over the North Atlantic

    Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Leon Lee; [2013]
    Nyckelord :CAT; clear air turbulence; turbulence indices; climatology; North Atlantic; ERA-Interim; AMDAR; CAT; clear air turbulence; klarluftsturbulens; turbulensindex; klimatologi; nordatlanten; ERA-Interim; AMDAR;

    Sammanfattning : Clear Air Turbulence (CAT) is the turbulence experienced at high altitude on board an aircraft. The main mechanisms for its generation are often said to be Kelvin-Helmholtz instability and mountain waves. CAT is an issue to the aviation industry in the sense that it is hard to predict its magnitude and exact location. LÄS MER

  7. 5. Prognos av clear air turbulence i DMI-HIRLAM : situationsstudier

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen

    Författare :Christina Mannerberg; [2012]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : På Danmarks Meteorologiska Institut har två index, TI3 och TI4, utvecklats i syfte att lokalisera riskområden för clear air turbulence (CAT). Indexen är ännu inte i operationellt bruk. Deras samband med andra parametrar i DMI-HIRLAM är inte känt och studeras här genom tre situationsstudier. LÄS MER