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Originally Posted by Long Haired Git
Sad to see so little improvement. Flllowwww rraaatteesss pppllleeeeaaasssseeeee
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Imprecise Science Time.
Lacking a flow meter, I was compelled to resort to using a time-to-fill process. Actually, it was kind of interesting. Not the time-to-fill as much as the back pressure.
Here goes:
I have a 12.7mm ID burping tee between the output my radiator and the inlet to the block very near the block, .13m above the pump. I attached a 1m length of 12.7mm ID Tygon tubing to the tap on it, going straight up in the air. Using a 1L beaker, I timed how long it took to fill it in an open loop (no push-pull benefit). The pump was situated so that it did not need to lift the water more than a few cm on the intake. The original system head of .13m was maintained going to the radiator, then up through the block. The outlet tube from the block, going to the beaker was as close to level with the block as possible. I live at 314m ASL and the water temperature was 20c with no water wetter in it. I turned on the pump and let it run long enough to burp out most of the air in the system. I then diverted the outlet tube from the resevoir (sink) to the beaker. Ten passes yielded an average time-to-fill of 12 seconds, or 5LPM. The back pressure from the block pushed the 12.7mm diameter column of water 790mm up the tubing while filling the beaker. I had the whole family helping. My wife ran the stopwatch and my 11 year old daughter marked the column height while filling the beaker. "Smokie", my Dalmation just sat and looked at us with his head cocked. Without the block, the average time-to-fill the beaker after ten passes was 5 seconds or 12LPM. There was no water pushed up the column without the block. Many towels ended up in the washer and Smokie ran off eventually after getting a squirt out of mischief.
Flow rate w/o block = 12LPM
Flow rate w/block = 5LPM
Pressure = (((1.27cm * .5)^2)*Pi)*79cm = 100cc = ~100g of water, then a gap here because I'm not certain what units to use. Meters of water is mysterious because I don't know what diameter a column of water that is based upon, or is it a constant, independent upon volume?
Anyway, do those values allow for determining whether I'm in the vicinity of the sweet spot for the type of impingement I'm trying to hit? I'm a darn good Engineering Technician, but I'm not an Engineer.
Thanks for everyones input on this Jet process. Now it's time to clean up the mess.
Hoot