Effect OF CO2/N2 dilution on laminar burning velocity of liquid petroleum gas air mixtures at elevated temperatures
The present experimental study reports the effect of CO2/N2 dilution on laminar burning velocity of premixed LPG (liquid petroleum gas) air mixtures at elevated temperatures using a preheated mesoscale diverging channel technique. The experiments were carried out for a range of equivalence ratios varying from 0.8 Ph 1.3 with percentage dilution of the fuel component by volume (b) for CO2 varying from 10% b 30% and N2 varying from 10% b 40% A power law correlation has been obtained for the present experimental data as a function of percentage dilution, mixture temperature and equivalence ratio. It has been observed that an increase in dilution with CO2/N2 leads to an increase in temperature exponent (a) The increase in temperature exponent due to CO2 dilution is more pronounced as compared to N2 dilution case. A flame structure study has been carried out to understand the effect of mixture temperature and diluent using USC (University of Southern California) Mech II reaction mechanism.