Module 5: Premixed Flame
  Lecture 25: Effect of Oxygen Concentration on SL
 


Effect of Initial Pressure and Temperature on SL

This relation is supported by experimental data
n: Overall order of global chemical reaction

for HC flames with
for HC flames with
for HC flames with
Pressure index,
For , m is negative, indicating burning velocity increases with decreasing pressure
(Figure 25.2)
For , m is constant, indicating burning velocity is constant
For , m is positive, indicating burning velocity decreases with decrease in initial pressure
 
(Figure 25.3)