Vortex
Vortex
(OP)
Pls, does anyone has a methode for determination of the required minimum static head above a exit pipe in order to avoid a vortex? The use of vortex breaker is unavailable.
The fluid is hot water (240 Celsius)
Thanks.
The fluid is hot water (240 Celsius)
Thanks.





RE: Vortex
PS
a.Why can't you use a vortex breaker?
b.Whats wrong with having a vortex?
c.Is the outlet an overflow? or a feed pipe.
Can you fit a grid on the inlet to the outlet to increase the outlet area. or have a large outlet which reduces.
Friar Tuck of Sherwood
RE: Vortex
I don't have supporting evidence.
However, as told by colleagues, ROT's for minimum static heads of liquid to avoid vortex formation at the bottom outlet would be:
One source: 2 ft of head for every fps of velocity in the outlet nozzle when the level is kept constant.
Another source (probably the "safest"): a minimum of 15 ft, in particular if the level is falling.
One last source: the above minimum levels should be increased by an undefined amount if the liquid enters the vessel tangentially.
Friartuck comments and questions are highly logical and it would be advisable you consider them and revert.
At the end, economics, or even safety reasons, may dictate the installation of vortex breakers to reduce the liquid hold up and the concomitant large dimensions of the vessel.
Good luck.
RE: Vortex
Lots of pump sites to go to for vertical pumps. Try a site search on this site first.
It would be interesting to see how those values, the minimum submergence of the pumps correlated to the values 23562 gave you above.
rmw
RE: Vortex
http://www.vortab.com/Index.htm
Also if you have an outlet flange you can buy or make one that insert in the pipe from the out side. If you go this way make sure it is heavy enough.
RE: Vortex
Regards,
RE: Vortex