Re: Simple gas combustion
Phil wrote:
>
> Hi!
> This is my first time posting here (5 newsgroups).
> I sure would appreciate some advice on a couple of things.
>
> First, what volumetric ratio is the optimal mixture for combustion of butane
> with air at STP?
Depends what you want out. For raw temperature, a stoichiometric mix
in pure oxygen. If you wnat to get work out of it in a real world
engine, other considerations intrude.
> What temperature is required to initiate the combustion reaction?
Not temp necessarily, energy input. Look up sparks and explosions. A
little Pt catalyst may set it off spontaneously. It is a free radical
chain - exponentiation chugs along.
> At what rate would a combustion front propagate through this mixture?
Depends. Confined or unconfined? Shape? Surface/volume ratio?
Deflagration, explosion, or detonation?
> If volume is held constant before and after combustion, by what amount will
> the temperature of the mixture have increased after the reaction?
> Finally, if the mixture is made leaner, will the temperature increase be
> reduced roughly proportionally to the amount of fuel present?
Doesn't that sound like a poorly stated p-chem homework problem,
folks?
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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