Statistical study on soot volume fractions of buoyant turbulent diffusion fires. (26th February 2022) - Bi, Yubo
Summary: The statistical soot properties of buoyant turbulent diffusion propane fire were experimentally and theoretically studied with different fuel sooting tendencies by nitrogen addition. Results show that nitrogen addition decreases the instantaneous soot volume fraction and increases soot intermittency. The combination of these two factors together leads to a decrease in mean soot volume fraction when nitrogen is added. Both radially integrated and the total soot volume fraction decrease with nitrogen addition. The radially integrated soot volume fraction is found to be a function of fuel concentration. A dimensionless correlation is proposed to predict the total soot volume fraction based on theoretical analysis and in good agreement with the experimental data. The results could provide guidance for predicting soot yield for buoyant turbulent fires.