Simulation of Oxy–Fuel Combustion of Heavy Oil Fuel in a Model Furnace

Abstract

The present study aims at investigating the characteristics of oxycombustion of heavy oil liquid fuel in a downfired model furnace. Nonpremixed probability density function (PDF) mixture model was used to simulate the combustion characteristics and turbulence chemistry. The validation of the present model was performed against the experimental data and is found to be in good agreement. The results depict that the oxycombustion of liquid fuels results in lower soot. It is observed that the soot formation is reduced when N2 in aircombustion is replaced by O2 in oxycombustion. However, it increases as the amount of oxygen in oxycombustion increases. Replacing nitrogen in the aircombustion by carbon dioxide in oxyfuel combustion tends to reduce the temperature levels in the upstream sections of the combustion chamber.