Module 4: Chemistry of combustion
  Lecture 21: Chain Branching Explosion
 


Quasi-Steady State Approximation

  • Radicals are formed during combustion
  • Half life period of radicals - Very small
  • Rate of formation = Rate of destruction
 

Relate radical concentration with
measurable concentration of other species

Consider the two step chain reaction,

;
;

Reaction rate of the three species,


     

Initial condition,