TY - JOUR
TI - Investigation of CO2 diluted methane and propane swirling premixed flames using CH* chemiluminescence imaging
AU - Adžić Vuk M
AU - Milivojević Aleksandar M
AU - Stamenić Mirjana
AU - Adžić Miroljub M
JN - Thermal Science
PY - 2019
VL - 23
IS - 15
SP - 1511
EP - 1521
PT - Article
AB - Utilization of hydrocarbon gaseous fuels, such as biogas, landfill gas and  others, is a valuable contribution to sustainable energy production and  climate changing control. The presence of CO2 in these gases decreases heat  of combustion, flame temperature, flame speed and can induce flame blow-off  and combustion instabilities. In order to better understand the problem,  flame geometry and location was investigated using CH* chemiluminescence  imaging technique. Combustion took place in a purposely built, lean,  premixed, unconfined swirl burner, fueled by methane and propane diluted  with CO2. The fuel type, air-to-fuel equivalence ratio and CO2 content were  chosen as the independent variables. The CH* imaging by means of a  commercial CCD camera, fitted with an optical filter, was used for flame  investigation. The analysis of images showed that the CH* emission  intensity, flame geometry and location were remarkably affected by the fuel  type and the air-to-fuel equivalence ratio, while the CO2 dilution was of  minor importance.