Sökning: "combustion laser diagnostics"

Visar resultat 36 - 40 av 84 avhandlingar innehållade orden combustion laser diagnostics.

  1. 36. Laser diagnostics and kinetic modelling of reaction intermediates in catalytic combustion

    Författare :Åsa Johansson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Catalysis; Combustion; Kinetic modelling; Palladium; Platinum; Water formation; OH hydroxyl; Laser–induced fluorescence; Cavity ringdown spectroscopy; Desorption energy; CHEMKIN;

    Sammanfattning : Abstract: http://hdl.handle.net/2077/16136.. LÄS MER

  3. 37. Laser Diagnostics in Combustion - Elastic Scattering and Picosecond Laser-Induced Fluorescence

    Författare :Frederik Ossler; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Spray; Picosecond laser; Streak camera; Time resolved; Fluorescence lifetimes; 3 – D flow imaging; 2 - D lifetime imaging; Pressure; Temperature; Hydrogen atoms; Oxygen atoms; 3-pentanone; Acetone; Lorenz-Mie theory; Aerosol; Fysicumarkivet A:1999:Ossler; Scattering; Fysik; Physics; Polycyclic aromatic hydrocarbons.;

    Sammanfattning : Elastic scattering and the Lorenz-Mie (LM) theory in particular is used for the characterization of sub-micron- and micron-sized droplets of organic fuels in sprays and aerosols. Calculations on the Lorenz- Mie theory show that backward-sideward scattered visible radiation can be used for unambiguous detection of ensembles of homogeneous droplets of organic substances with diameters around 1 micrometer (size parameter between 2 and 6). LÄS MER

  4. 38. Combustion Engine Characterization and Development by Means of Laser Diagnostics

    Författare :Mattias Richter; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; framdrivningssystem; Laser technology; Laserteknik; plasma; fluiddynamik; Gaser; plasmas; Gases; fluid dynamics; Motorer; laser engine lif plif; Motors and propulsion systems; Fysicumarkivet A:2002:Richter;

    Sammanfattning : Planar laser induced fluorescence (LIF) has been utilized for two-dimensional imaging in combustion environments. By using tracer LIF the fuel distribution prior to ignition has been monitored in a GDI-engine. LÄS MER

  5. 39. Infrared Laser-Induced Grating Techniques for Diagnostics in Reactive Flows

    Författare :Dina Hot; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser diagnostics; infrared; laser-induced grating spectroscopy; degenerate four-wave mixing; flames; temperature; concentration; Fysicumarkivet A:2020:Hot;

    Sammanfattning : AbstractThe work presented in this thesis is mainly focused on the development andapplication of infrared laser-induced grating techniques in order to measure the gasphase temperature and species concentrations in reactive flows. The two techniquesused for this purpose are laser-induced grating spectroscopy (LIGS) and degeneratefour-wave mixing (DFWM). LÄS MER

  7. 40. Laser-Induced Incandescence for Soot Diagnostics: Theoretical Investigation and Experimental Development

    Författare :Jonathan Johnsson; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; premixed flat flames; fractal soot aggregates; laser-induced incandescence; soot; soot optical properties; soot absorption function; laser diagnostics; Fysicumarkivet A:2012:Johnsson;

    Sammanfattning : Laser-induced incandescence, LII, is a laser-diagnostic technique that can be used to measure the volume fraction and the sizes of soot particles suspended in a gas, such as within a combustion process or in its exhausts. The technique is based on the facts that the time-decay of the radiation from laser-heated soot particles is directly related to the particle size in the probed volume, and that the time-integrated radiation is related to the soot volume fraction. LÄS MER