الفهرس 
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Abstract
ABSTRACT
The global demand of energy continues to increase despite the recent crises in the economy around the world and the uncertainties in the future perspective. Natural gas is considered to be the largest growing fuel source, offering a quarter of the global energy demand by 2040. Most of the experimental work on the fundamental understanding of the combustion behavior of gaseous fuels has been carried out in laminar flame burners.
The present work aims at providing an experimental mapping of the changes in the soot volume fraction and mean gas temperature associated with the addition of different percentages of soot inhibitor additives (namely; Argon, Nitrogen, and Helium) and soot promotion (namely; Acetylene) in a vertical laminar diffusion natural gas flame issuing from a honeycomb circular burner. Measurement traverses along and across (at fixed radial locations) are conducted.
Four different measuring techniques are employed throughout the whole experimental program. These include, (i) a high resolution digital camera (up to 3.7 fps) for flame visualization, (ii) the soot volume fraction is acquired by the laser extinction method, (iii) the mean gas temperature is accomplished by a bare 51 µm (Pt-30% Rh versus Pt-6% Rh) thermocouple to render radiation loss insignificant, while (IV) Hyperspectral technique to investigate Chemiluminescent emission from CH and C2 radicals.
A novel combustion diagnostics system based on flame radiation measurement and spectral emissions analysis is presented employed (hyper-spectral technique). Hyperspectral images are made up of energy measurements at different wavelengths of light. The case is considered where these measurements are dependent on temperature, the self-emitted energy (emissivity), and reflected energy from the surroundings. Chemiluminescent emission from CH and C2 radicals and its dependence on the total volume flow rates of additives are being investigated in the current study.