Jerry Hey wrote:

Does anyone see a problem with supplying air to the cool tube as
shown
in the drawing?   Also,  could slowing the air inside the tube by
slightly restricting the outlet be beneficial?   The purpose would
be
to make sure  cool air contacted 100 per cent of the inner surface
of
the cool  tube.  If it just swirls in from the inlet, might there
be
hot spots?     Jerry

Jerry Hey
j-winddesigns@thegrid.net

You won't get any airflow unless you hook the 1-1/2 inch tube to a
source
of dynamic pressure. Restricting the out let will hurt rather than
help.

If you really want to cool the tube better you need internal
fins. No easy way to do that.

Paul Lamar

Paul and Jerry,
There is an easy way to put fins in the  2' cool tube - if you put
them in
before you weld the 2" tube into the 6" tube.

Just drill some holes directly through the 2 " tube and weld in what
you
want ( flat or round) - weld from the outside.
You could probably leave them long, which would cause some swirling
in the
inside of the 6" tube as well.

Just a suggestion!

George (down under)

Thanks, but I don't want or need fins inside the cool tube.  It is
interesting how a simple communication immediately gets off course and
ends up in  the strangest place.   Jerry

Sorry I brought it up Jerry but you did mention enhancing the cooling
of the tube.

Paul Lamar

I did get a bit testy yesterday.  Even the dog  maintained  her
distance from me.    Today rereading  the various comments about fins
and all was interesting and appreciated.      Jerry

Well if you are going to be nice like that here is another suggestion :)
Make a long cross out of .063 steel slighty larger than the tube. Heat up the two inch
tube and press the cross in. No welding required.

Paul Lamar
 
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