close pipeline siphon connecting open canal at both the ends
close pipeline siphon connecting open canal at both the ends
(OP)
- I need to measure the water from an open channel getting into the pipeline siphon (1 meter dia, 800 meters long) and the discharge coming out. As the water head of the open channel at the inlet will be higher then the pipeline orifice - it looks air pockets are creating problems (resulting into vacuum). Any suggestions / advice please.
JBBR
JBBR





RE: close pipeline siphon connecting open canal at both the ends
RE: close pipeline siphon connecting open canal at both the ends
How deep is the entry of the syphon?
how do you start the syphon in the first place?
What are relative levels ( this is where a sketch would work wonders), invert levels, high points, low points etc.
To avoid sedimentation ( your other post), you normally need to be flowing at > 0.75 m/sec.
what is your flow / velocity in the pipe?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: close pipeline siphon connecting open canal at both the ends
Why do you need to measure flow into and out of the pipeline, they are the same.
If air is getting behind a measuring orifice plate drill a vent hole in the plate.
RE: close pipeline siphon connecting open canal at both the ends
http://macemeters.com/solutions/agricultural/
RE: close pipeline siphon connecting open canal at both the ends
if you dont have sufficient velocity in the siphon, than air (dissolved, bubbles) from the canal will get trapped in the siphon. your only solution to this is to increase the velocity in the siphon to move the air through.