Sökning: "combustion laser diagnostics"

Visar resultat 1 - 5 av 72 avhandlingar innehållade orden combustion laser diagnostics.

  1. 1. Laser Sheet Imaging and Image Analysis for Combustion Research

    Författare :Rafeef Abu-Gharbieh; Chalmers University of Technology; []
    Nyckelord :non-linear diffusion filtering; optically dense sprays; curve evolution propagation; image sequence analysis; laser induced fluorescence; geodesic paths; level sets; LIF; optical density; spray characterization; flame propagation; laser; particle image velocimetry; spectroscopy; combustion engines; spray diagnostics; Mie scattering; flame fronts; laser attenuation; tracking; combustion diagnostics; curve matching; combustion; laser sheet imaging; PIV; time resolved imaging; segmentation;

    Sammanfattning : This Thesis presents techniques that aim at exploiting the potential of image analysis and processing in order to solve problems of data reduction, interpolation, quantification, and interpretation within the field of experimental laser imaging of combustion processes. Combustion is the most important source of energy for power generation, heating, and transportation in the world today and its strong dominance is projected to continue in the foreseeable future. LÄS MER

  2. 2. Laser Spectroscopic Techniques for Combustion Diagnostics Directed Towards Industrial Applications

    Författare :Hans Seyfried; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Teknik; Technological sciences; Fysik; Physics; Combustion; Gas turbine; HCCI; Engine; High-Speed; Thermographic phosphors; PLIF; LIF; Laser Diagnostics; Laser-Induced Fluorescence; Laser technology; Laserteknik; Motors and propulsion systems; Motorer; framdrivningssystem;

    Sammanfattning : In the work presented in the thesis, different laser spectroscopic techniques were utilized for measurement of species concentrations, as well as for surface thermometry. Experiments were conducted in various combustion environments, ranging from laboratory burners to truck-sized internal combustion (IC) engines, gas turbine combustors and a full-size aircraft turbofan engine. LÄS MER

  3. 3. Development and application of laser diagnostics - from laboratory devices towards practical combustion engines

    Författare :Zhenkan Wang; Förbränningsfysik; []
    Nyckelord :Combustion diagnostics; Laser induced fluorescence LIF ; Ultra-high-speed; Burst-mode laser; Ballistic imaging; Particle imaging velocimetry; Laser Doppler anemometry; Turbulent premixed combustion; Plasma; Internal combustion engine; Partially premixed combustion PPC ; Auto-ignition; OH radical; CH2O formaldehyde ; Fysicumarkivet A:2018:Wang;

    Sammanfattning : For many decades, research work on combustion has been focused on improving combustion efficiency and reducing harmful emissions. Laser diagnostics is one of the best ways to investigate the combustion process and emission formation as it is non-intrusive and it has high spatiotemporal resolution. LÄS MER

  4. 4. Development and Application of Single-Ended Picosecond Laser Diagnostics

    Författare :Billy Kaldvee; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Raman Scattering; Temporal Filtering; Picosecond Laser Diagnostics; Rayleigh Scattering; Laser-spectroscopy; DIAL; Laser Combustion Diagnostics; Lidar; Laser-induced Fluorescence; Laser-induced Incandescence; Fysicumarkivet A:2012:Kaldvee;

    Sammanfattning : Light detection and ranging (lidar), a method for nonintrusive, single-ended, and range resolved measurements, has been developed and applied for combustion related diagnostics. Employing picosecond laser pulse durations and detectors providing temporal resolution on the order of picoseconds, lidar has been applied successfully for both quantitative temperature- and species concentration measurements, obtaining an ultimate range resolution of 0. LÄS MER

  5. 5. Application of laser diagnostics for two-phase imaging of fuel sprays and quantitative measurements of combustion radicals and soot

    Författare :Stina Hemdal; Chalmers University of Technology; []
    Nyckelord :two-phase imaging; laser diagnostics; premixed flame; soot; fuel sprays; intermediates; combustion; cavity ringdown spectroscopy; spectroscopy; tracers; laser-induced exciplex flourescence; catalytic combustion; laser induced flourescense; emission; diffusion flame;

    Sammanfattning : .... LÄS MER