Akademik Veri Yönetim Sistemi
14th International Conference on Computational Heat and Mass Transfer, Düsseldorf, Almanya, 4 - 08 Eylül 2023, cilt.1, ss.192-204
Ethylene is an important mixed product of natural gas and oil, as it has small molecules and a simple gas-phase mechanism that can be extended to large-molecule fuels. In our experimental studies, the radiative intensity of lam inar co-flow ethylene flames was measured under air combustion conditions in the infrared wavelength range 2.5–5 µm. These combustion experiments were repeated several times using a burner with and without a covering of insulating material (silica aerogel). The radiative intensity of the flame was measured over the entire laminar flame height (5–9 cm). The flow rates (φ) of pure ethylene con sidered in this work were 140, 160, 180, and 194 mL/min. Based on the measured radiative intensities, the CO2 volume fraction and temperature distributions in the f lameswereinvestigated using particle swarm optimisation (PSO) modelling. The two-dimensionaltemperaturedistributionsandCO2 volumefractionsoftheflames (194 mL/min) were also modelled using the CoFlame code for comparison. As the flow rate of ethylene increased, the radiative intensity of CO2 also increased, and the peak values of the CO2 intensity were in the range 4200–4350 nm. The errors for the results calculated with PSO were less than 1% for the volume frac tions of CO2 studied here. As the flame temperature decreased with increasing f lame height, the radiative intensity of CO2 also decreased. This study enables a fundamental understanding of the structural effects of a pure ethylene flame with a gas volume fraction of CO2 in non-premixed air combustion systems.