Tuesday, June 11, 2019

fuel - Open flame combustion in bizarro world


Humans typically achieve combustion by starting a chemical reaction of a fuel (often a carbon $\ce{C}$ containing fluid like methane $\ce{CH4}$), which is is brought into an an oxidizer (a gas containing $\ce{O}$, like air). For example, when you turn on a lighter.




What would happen if the situation were turned around?


We have an open space entirely filled with fuel and we let in some oxygen-containing fluid. How would the combustion look?



I know the (adiabatic?) temperature maximum of a flame will be achieved at conditions which are slightly on the fat side. But I have no idea how, for example, the production of unburned $\ce{C}$'s, soot production and so on, would look.




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