[Stoves] Briquette ignition in a Vesto Junior
David G. LeVine
dlevine at speakeasy.net
Sun Aug 5 21:54:33 CDT 2012
On 08/05/2012 02:50 PM, Rok Oblak wrote:
> An additional comment regarding the gap around the briquette - At
> later stages of burning the briquette partially shrinks and starts to
> burn from the outside as well, this helps to burn faster in that stage
> which is really important as briquettes give loads of CO in late stage
> and burn less powerful. The gap around is a simple feature helping the
> briquette to burn equally at all stages
Back when I was studying solid fueled rockets (please, no rocket science
jokes), I noticed that the center holes were NOT round for constant
thrust, but were star or polygonal shaped. The inner area was constant
as the fuel/oxidizer burned.
It seems if the inside of a briquette were not round (so there was more
exposed area), energy output over the burn could either be higher at the
beginning or constant throughout the burn. If you look at a simple
splined shaft, for example, the opening has much more area initially,
but when the spline burns through, the area drops.
Thoughts and comments gracelessly accepted here.
Dave 8{)
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