7" Core with TripWire/P-Channel/KickTail - Design

[Cramer]

As a result, there's a slight under pressure present in that corner and a lot of turbulence. Under pressure in corners also create drag so only part of this is ticked as positive effect.

I understand the P-Channel and its purpose combined with the trip wire.  A question I have is the implementation of these two innovations in a round feed tube and burn tunnel.  Same rule as 5% of the CSA of the feed tube I assume but how would one implement it?  Or is it even of benefit in a round configuration?  On the other end of things, where it comes to the back sweep, if the round tube is a sweep already (i.e. a curved 90 degree bend) is it beneficial to incorporate a kick tail?  In the angled riser when the gasses leave a round burn tunnel they naturally swirl in the riser tube which creates turbulence at that point without much drag.  That is the reason for the question.  I thought I had asked this question already but I don't see it so maybe I did not after all. 

[pinhead]

Jan 27, 2014 16:24:15 GMT -8 Cramer said:

As a result, there's a slight under pressure present in that corner and a lot of turbulence. Under pressure in corners also create drag so only part of this is ticked as positive effect.

I understand the P-Channel and its purpose combined with the trip wire.  A question I have is the implementation of these two innovations in a round feed tube and burn tunnel.  Same rule as 5% of the CSA of the feed tube I assume but how would one implement it?  Or is it even of benefit in a round configuration?  On the other end of things, where it comes to the back sweep, if the round tube is a sweep already (i.e. a curved 90 degree bend) is it beneficial to incorporate a kick tail?  In the angled riser when the gasses leave a round burn tunnel they naturally swirl in the riser tube which creates turbulence at that point without much drag.  That is the reason for the question.  I thought I had asked this question already but I don't see it so maybe I did not after all. 

The P-channel definitely helps a round-feed J-tube. The implementation is easier than you think. Unfortunately I decommissioned my J-tube before I read of the "kick-tail" below the riser.

Here's how I did it: Pinhead's Round J-Tube P-Channel.

If I recall correctly, the p-channel is 3.5 inches wide on a 6 inch J-tube. I posted a thread a long time ago asking how to calculate the width of the port... I'll see if I can find it. **EDIT** HERE is the post/thread.

[misterkel]

Could anyone link me to a detailed explanation of the P-channel. I need a solid basic primer on it.
thanks.

[Robert]

(p) Peter channel A channel that allows secondary combustion air to be pre-heated in, and exit right in front of the burn tunnel resulting in more complete burning of combustion gasses.

and all thread describing the stages of development made by Peter can be found here:
donkey32.proboards.com/thread/355?page=3

[peterberg]

Jan 27, 2014 16:24:15 GMT -8 Cramer said:

On the other end of things, where it comes to the back sweep, if the round tube is a sweep already (i.e. a curved 90 degree bend) is it beneficial to incorporate a kick tail? 

Yes, definitely.

[patamos]

Hi Y'all,

Peter, I am a little confused about carving the brick to create the trip wire. Is the centre of the brick (with the arrow tip towards the burn chamber) the part to grind/carve to 5mm depth? Or is this central pointy surface what i want to be hanging down more - which means i am to carve the sides of the brick around it?

Any help is much appreciated

thanks

pat

[Robert]

you need to carve the brick around the arrow shape. so when you will place it in a tunnel, then it will be hanging...

look at this picture again:

[Cramer]

Jan 27, 2014 at 7:24pm Cramer said:
On the other end of things, where it comes to the back sweep, if the round tube is a sweep already (i.e. a curved 90 degree bend) is it beneficial to incorporate a kick tail?

Peter said:
Yes, definitely.

Thanks Peter!

[independentenergy]

I tried...

[kees57]

Hi all and Peter.


I have read about the P channel and trip wire for inducing turbulance and preheated air, question is, is air hot enough?, need quite hot air for burn
smoke gasses, but mabe the tunnel is already hot enough, I did think about extent the P channel beneath the stones more to riser te get in real hot area.

peter you create much interesting stuff, but can you help me also with making the trip wire brick, do the arrow need a degree or what, much different readings
about it, or cut it out of the stone and make some degree down?, in nederlands moet de pijl op de steen een hoek maken? beetje onduidelijk te lezen overal.

Putting the sone more backwards to riser and extent the preheat plate underneath the bricks can mean it get hot enough to destroy the metal quick, so use steel with
high carbon content do survive much longer.

here is a test with stones from a street, not firebrick, makes nice growl.

youtu.be/TjEtYNXrSSY

regards

[kees57]

ohhh I did see on page three how to do it, sorry, but now I do now how.



regards