Theory 24/Combustion
Soot Is a Residence Ratio
The claim
Soot emission is set by the ratio of residence time in the rich zone to the oxidation time in the lean zone, not by equivalence ratio alone.
01The mechanism
Soot forms in rich pockets and burns out later; what escapes is the fraction that never sees enough oxygen for long enough.
02Predictions
- P1Soot should track the ratio.
- P2Equivalence ratio alone should mispredict across mixing.
03Refutation
Soot tracking equivalence ratio would remove the residence term.