Discussion
Kerosene has a stoichiometric air-fuel ratio near 15 to 1. An overall ratio of 60 to 1 gives an equivalence ratio of
Answer: B
Equivalence ratio is the stoichiometric ratio divided by the actual one, \( 15/60 = 0.25 \). Values well below one describe a lean mixture, and the whole architecture of the chamber exists to burn a globally lean flow in a locally stoichiometric zone.
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