FlowSoft - The Scoop on the PTS-DM with FlowSoft

Any discussion pertaining to data acquisition for a flowbench application. Not limited to computer related projects, this is a catch-all for anything non-water gage?

This will keep items of like interest easy to find on the forum.

Postby 1960FL » Sat Mar 28, 2009 3:30 pm

Update on FlowSoft and the PTS-DM

Bruce and I have had a couple of extensive conversations about the DM, flow bench functionality and motor sizing. With the Surplus Center motors gone and the next best motor out there at 3 to 4 times it cost the motors are now becoming even a bigger factor in bench sizing. At the current time FlowSoft is configured to function under a 16" Delta P, But could go down as far as 8 or so depending on the sensors available or if someone was doing a small bench say 2 motors.

Rick
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Postby stef-1 » Mon Mar 30, 2009 1:45 pm

Can it be usable for people using very low deltap's on small benches? Like 10" test pressure with 2.5" deltap across the orifice...

Other thing that may be useful... if you have the ability to input either valve o.d or seat i.d/angle with lift you could show the discharge coefficient on the fly, which after all is what we're really interested in :)

Output to an excel compatible file I like. Can it output for multiple tests at a time e.g. if I test a port at 10" test pressure then 15", 20", 25", etc. I can use this to generate a 3d contour map of the port e.g. cd vs lift vs pressure ratio. This can be used as input into an engine simulation or used to spot problems with the port.
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Postby Tony » Mon Mar 30, 2009 2:47 pm

stef-1 wrote:Can it be usable for people using very low deltap's on small benches? Like 10" test pressure with 2.5" deltap across the orifice...

The problem with using very low design orifice pressure drop is not just in measuring the actual low differential air pressure, (although that is also an issue). The orifice itself becomes much more sensitive to any slight upstream air turbulence with very low air velocities through the orifice.

The more violence and fury there is right at the measurement orifice, the less sensitive the orifice will be to any slight flow imperfections in the up stream air.

The end result is that far better bench accuracy and repeatability will be obtained when using higher orifice design pressure drops. If you have the blower power to do it, always go as high as you possibly can.

While it is appreciated that some people through necessity, are forced to test at very low pressures, it is not a desirable way to go as regards overall accuracy or repeatability.
Also known as the infamous "Warpspeed" on some other Forums.
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Postby 1960FL » Mon Mar 30, 2009 6:02 pm

Output to an excel compatible file I like. Can it output for multiple tests at a time e.g. if I test a port at 10" test pressure then 15", 20", 25", etc


Stef, FlowSoft outputs what it actually reads at the sensors and performs the math based on the actual read test pressure. One the data is exported you could create additional columns in the spreadsheet to accommodate you to extrapolate flow at different depressions up or down.

Rick
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Postby otto69 » Sat Oct 10, 2009 6:23 am

Hi Rick

Has there been any updates to the software ??

Clayton
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Postby 1960FL » Sat Oct 10, 2009 6:10 pm

Clayton,

As of lately only bug fixes and minor os adjustments, gearing up to begin the next phase of enhancements to FlowSoft Basic. Is there anything in particular you are looking for?

Rick
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Postby otto69 » Mon Oct 12, 2009 8:11 am

Thanks Rick

No I dont have any at the moment. Looking at purchasing Bruce's DM, plans and plates in the near future and was wondering if the software had upgrades / additions.

What sort of enhancements were you thinking of ??
cheers

Clayton
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Postby jfholm » Mon Oct 12, 2009 11:48 pm

[quote="1960FL"][color=#000000]So here is the plan, to make the PTS-DM and FlowSoft usable by those that do not currently run a 16
It is a wise man that learns from his mistakes, but it is a wiser man that learns from the mistakes of others.
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Postby bruce » Tue Oct 13, 2009 6:30 am

We've talked about it but been to busy with other things that no actual testing has been done on this yet to see what really needs to be done.

Bruce
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Postby 1960FL » Wed Oct 14, 2009 12:21 am

John I am not sure what you are asking? do you mean use a 13" plate with the 16" sensor? I am trying to put my head around this.

Rick

Did you get my PM about casting goo?
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Postby jfholm » Wed Oct 14, 2009 9:51 am

1960FL wrote:John I am not sure what you are asking? do you meen use a 13" plate with the 16" sensor? I am trying to put my head around this.

Rick

Did you get my PM about casting goo?

It would be just to match what I calibrated my orifice for as to my inclined manometer. ;-) I guess I just need to drop the inclined idea. I just wanted a back up. And maybe I don't really need to do that either.

I did not get the PM btw

John
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