[Stoves] Cyclonic sorting/cooling

[Tom Miles]

The French company Pillard once recycled combustion (stack) gases with the
combustion air to achieve the mass flow necessary to maintain the vortex
while controlling excess air. It appeared to work but there must have been
other complications because they never developed a commercial product using
the concept.

Tom  

-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of AJH
Sent: Wednesday, August 02, 2006 12:39 PM
To: drew at artforging.com
Cc: stoves at listserv.repp.org
Subject: Re: [Stoves] Cyclonic sorting/cooling

On Wed, 02 Aug 2006 12:06:35 -0700, drew wrote:

>Interestingly the cyclonic effect could be adding to the efficency of 
>the device, not by mixing but by sorting,  the centripidal force 
>throwing heavier/cooler gasses to the outside, while the hot light 
>gasses move inward.   

This is what happens and a turbulent shear layer exists at the meeting
point. A drawback of this is that dilution air exits without entering
the combustion, so it is inherently a high excess air device.