Quote:
Originally posted by Dix Dogfight
@BB2K
Why not use a straight inlet?????
To eliminate a bend in the piping where the water velocity is high.
EDIT: It might not matter but you are aiming for a top performer right?
|
The problem is that this 1 1/2 (1.5) tee is about 3.5 inch wide, at the branch. Since there's only 8 inches in width in the case (which I assume is typical), that would only leave a couple of inches for a tube to bend, with a "straight inlet". That bend would make it all much worse for flow (I'll be using thick braided 3/4" tubing).
The inner tube would be bent in the largest radius possible. I'm even considering using a drain trap tee, which has a nice curve from the branch to one of the runs (ends).
The only thing I have to add about it is that the water return should exit downward, to make draining this thing easier.
I am aiming for a top performer, yes, but I have A LOT of calculations to go through! I was hoping to do that Saturday, but I got caught up in all of the other calculations:
Fin set #2 starts (the pointy tip) at radius 2.5 mm
Fin set#2 taper ends at 3.3mm.
Fin set #3 starts at radius 4.6mm, and the taper ends at 6.4 mm.
fin set #4 does not appear in this design, because it starts at radius 9.0 mm, and the whole fin pattern has been reduced (temporarily) to 7.5, pending my thermal calculations.
I made a number of drawings (which I'll try to post this week), so that I can visualize the inpingement. I have more work to do on that too, using some info found here:
http://www.electronics-cooling.com/h...01_may_a2.html
and
http://widget.ecn.purdue.edu/~eclweb/jet_benchmark/
To be explored: using 4 nozzles/holes, instead of one.
Myv65: I'm not done with the numbers yet, to even say that I'm redy to experiment. I'd rather spend more time going through the numbers, until I get this thing to a point where I have a fair idea of how well it will cool. I know that ya'll just can't wait to see it in action, but unless someone is going to run the thermals for me, ya'll are going to have to wait!
I still need help on the Reynolds calculation.