inverted siphon
inverted siphon
(OP)
i have to design an inverted siphon. but situation is
a conduit is taken out from dam. water is to be delivers to inverted siphon immediately after impact wall. but the level of invert of siphon is higher than the conduit outlet level. now my question is whether siphon will pass water with out any disturbance or to lower the invert level of siphon and create a head on it. so that it could pass it to outward.or any other suggestion. here is the detail sketch and design calculations
a conduit is taken out from dam. water is to be delivers to inverted siphon immediately after impact wall. but the level of invert of siphon is higher than the conduit outlet level. now my question is whether siphon will pass water with out any disturbance or to lower the invert level of siphon and create a head on it. so that it could pass it to outward.or any other suggestion. here is the detail sketch and design calculations





RE: inverted siphon
What's an impact wall?
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RE: inverted siphon
this has been discussed before, see search of this website:
http://www.eng-tips.com/search.cfm?pid=378&act...
RE: inverted siphon
What is an "inverted" siphon?
Sometimes its possible to do all the right things and still get bad results
RE: inverted siphon
http://aggie-horticulture.tamu.edu/archives/parson...
RE: inverted siphon
RE: inverted siphon
RE: inverted siphon
RE: inverted siphon
Section AA - where EXACTLY is the water level of the dam.
The bottom of the pipe is 466.92m, which equates to your start point on the profile.
I didn't follow the entire calculation, but it's clear you have very small margins here.
clearly, the lower your inlet invert level the better to reduce inlet losses, but the key item driving everything is the differential head between the dam water level and the outlet invert level.
That's what I don't clearly get from your drawing.
Most people would just call this a pipeline, not an "inverted syphon". The fact it has such a dip is not of any real importance, it's the fact that the pipe does not go above the inlet level and the end point is below the inlet level. Therefore there will be some flow, but how much is not clear.
The only issue becomes whether there is sufficient velocity to make sure you don't start to gather debris / solids at the base of the dip. 4.3 ft/sec should be enough to keep it all in suspension
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: inverted siphon
Wastewater Collection by Metcalf & Eddy has a design procedure for an inverted siphon (depressed sewer).
RE: inverted siphon
RE: inverted siphon