Sökning: "Flux chambers"

Visar resultat 6 - 10 av 17 uppsatser innehållade orden Flux chambers.

  1. 6. Thermal gas radiation modelling for CFD simulation of rocket thrust chamber

    Master-uppsats, KTH/Kraft- och värmeteknologi

    Författare :Rejish Lal Johnson Samee Lal; [2019]
    Nyckelord :Gas radiation; thrust chamber; CFD; heat transfer; Rocflam3; methane; Gasstrålning; tryckkammare; CFD; värmeöverföring; Rocflam3; metan;

    Sammanfattning : Methane and oxygen are a promising propellant combination in future rocket propulsion engines mainly due to its advantages like reusability and cost reduction. In order to have a comprehensive understanding of this propellant combination extensive research work is being done. LÄS MER

  3. 7. Thermal gas radiation modelling for CFD simulation of rocket thrust chamber

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

    Författare :Rejish Lal Johnson S; [2019]
    Nyckelord :Gas radiation; thrust chamber; CFD; heat transfer; Rocflam3; methane.; Gasstrålning; tryckkammare; CFD; värmeöverföring; Rocflam3; metan.;

    Sammanfattning : Methane and oxygen are a promising propellant combination in future rocket propulsion engines mainly due to its advantages like reusability and cost reduction. In order to have a comprehensive understanding of this propellant combination extensive research work is being done. LÄS MER

  4. 8. Optical Analysis of the Hydrogen Cooling Film in High Pressure Combustion Chambers

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Fabian Weber; [2019]
    Nyckelord :optical; analysis; hydrogen; h2; cooling; film; high; pressure; combustion; chambers; rocket; engine; thrust; experimental; oh*; shadowgraphy; flame; emission; lox; liquid; bipropellant; cryogenic; efficiency; heat; flux;

    Sammanfattning : For performance optimisation of modern liquid cryogenic bipropellant rocket combustion chambers, one component which plays an important role in reducing the wall side heat flux, is the behaviour of the cooling film. At the Institute of Space Propulsion of the German Aerospace Center (DLR) in Lampoldshausen, hot test runs have been performed using the experimental combustion chamber BKM, to investigate the wall side heat flux which is -- among other factors -- dependent on cooling film properties. LÄS MER

  5. 9. Methane fluxes from tree stems in Amazon floodplains : Evaluating methodological aspect of measuring spatial and seasonal variability in a flooded system

    Kandidat-uppsats, Linköpings universitet/Tema Miljöförändring

    Författare :felicia Widing; Nina Rubensson; [2018]
    Nyckelord :CH4; Tree stems; Amazon floodplain forest; Wetlands; flux; Solimões; Negro; Tapajós;

    Sammanfattning : Träd i tropiska våtmarker har uppmärksammats som en viktig källa till regionala och globala metan (CH4) utsläpp, då träd fungerar som utsläppskanaler för metan som bildas i sedimenten. Dock finns det en osäkerhet gällande säsongsvariation och rumslig variation samt mängden CH4 utsläpp från träd, eftersom kunskapen kring regionala flöden är begränsad. LÄS MER

  7. 10. Methods of measuring GHG fluxes at a full-scale Swedish WWTP: : A focus on nitrous oxide, methane and carbon dioxide in the SHARON treatment

    Kandidat-uppsats, Linköpings universitet/Tema Miljöförändring

    Författare :Sjögren Jimmy; Enhäll Elin; [2017]
    Nyckelord :Wastewater treatment; SHARON; nitrious oxide; methane; carbon dioxide; greenhouse gas emission; flux chamber; gas sensors;

    Sammanfattning : The Stable high rate ammonia removal over nitrite (SHARON) at Nykvarnsverket in Linköping is a relatively new kind of biological treatment. Fluxes of nitrous oxide (N2O) has not been fully mapped at Nykvarnsverket and additional efforts are needed for increased knowledge about possible emissions. LÄS MER