[Stoves] bluff body burner

[Harris, Kirk]

Attached is a video of a bluff body burner which emerged from my 
experiments with TLUDS.  It pays attention to the pressure variations 
inside the stove and uses them to mix the wood gas and the secondary 
air.  It has the wonderful quality that as the power level is turned up 
and there is more wood gas, more secondary air is injected, meaning more 
wood gas/more secondary air, and less wood gas/less secondary air.  It 
automatically adjusts the amount of secondary air to the amount of wood gas.

At the beginning of the video the forced primary air is off and the 
stove is all natural draft.  Then the fan is turned on, slowly through 
its three power levels to allow the flame to respond, up to its highest 
power (no smoke at any time).  The flame stays clear of smoke because 
the natural draft secondary air has increased enough to burn the 
increased wood gas.  The secondary air entrance is clearly visible above 
the fuel reactor and below the burner, where the reflection of the flame 
is visible.

The burner is probably to tall for a cook stove, but may have other 
applications.  This burner was sent to Norm Baker to test on his biochar 
kilns.

Kirk H.


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