by Thomas Vaught » Sun Apr 10, 2005 10:06 am
I had .125 steel 24" X 24" cut on a laser with 5 holes in a "dice"
(Number 5) pattern. The holes were arranged to have the maximum distance between the walls and each other. All of the holes were with-in .001" of My requested size after the process.
The holes did not have a 45 degree under cut as I was thinking
about flowing in both directions during that part of the design/
construction phase. Also a lot of people were copying the MSD type bench and wanted flow in both directions.
When I build a new bench it will use 4 holes (vs 5 now) and will
be one direction only but I will use two measurement plates (Like
Tony did with his Blower Centered bench). The Super Flow 600 is actually a form of a blower centered bench .
Example:
Exhaust flow: Air comes from outside the case, thru the motors,
past the orifice plate, and up to the test piece.
Intake flow: Air comes from the test piece, thru the orifice plate,
thru the motors, and then outdside the case.
If you made a bench so that when you read exhaust flow you by-pass the intake orifice plate, you would have the same thing.
Same for the intake flow. (By-pass the exhaust plate).
Food for thought.
I will post some numbers for the SF orifices I have measured over
the years the flow, and the delta P.
Tom V.