Bathtup-type vortex
Bathtup-type vortex
(OP)
If you have a pipe drawing fluid from a reservoir, there is a possibility that a vortex can form, allowing air to enter the pipe, even though the pipe entrance is fully below the fluid surface. Example: A bathtub draining. Question: Does anyone have any information on minimum depth or maximum flow rates required to avoid this?
I'm familiar with anti-vortex plates and diffusers intended to prevent this, but have never seen any actual test or theoretical data to show that they would work.
Thanks!
I'm familiar with anti-vortex plates and diffusers intended to prevent this, but have never seen any actual test or theoretical data to show that they would work.
Thanks!





RE: Bathtup-type vortex
Goulds Pump Manual has a section on suction pipe design. The following link should take you to an excerpt of the manual that illustrates recommended pipe submergence.
http://www.gouldspumps.com/pag_0006.html
Cheers,
CanuckMiner
RE: Bathtup-type vortex
S = D+[(0.574Q)/D1.5]
Where S is the submergence in inches
D is suction pipe diameter in inches
and Q is flowrate in USGPM.
RE: Bathtup-type vortex
Quark, do you have a reference or source for that equation? Thanks.
RE: Bathtup-type vortex
Also visit http://www.fluidedesign.com/help11.html