vortex breakers
vortex breakers
(OP)
Why is it so important to have a vortex breaker in your towers and vessels? Does a vortex damage the vessel or does it impact the process some how?
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RE: vortex breakers
best wishes,
sshep
RE: vortex breakers
RE: vortex breakers
rmw
RE: vortex breakers
RE: vortex breakers
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-MJC
RE: vortex breakers
If your pump is fed with enough heigth you can spare it.
But if for some reason your fluid wants to gas out in the pump, a vortex breaker will not do (much) good.
RE: vortex breakers
Inadequate submergence can result in rotation of the water in the tank, resulting in the formation of strong free-surface air core vortices and the entrance of air into the pump suction inlet. This phenomenon is commonly called vortexing.
Vortexing can cause unstable pump operation, vibration, pulsation and severe mechanical damage.
The U.S. based Hydraulic Institute has produced the following guidelines for recommended minimum submergence of the pump suction inlet to reduce the probability that strong free-surface air core vortices will occur:
S = Minimum submergence to prevent vortexing, in inches
D = Pump suction inlet diameter in inches
Q = Pump design flow rate, in USGPM
S = D + [( 0.574 x Q) /( D^1.5)]
Source: American National Standard for Pump Intake Design, Hydraulic Institute, ANSI/HI 9.8-1998,
Section 9.8.7
Q = 3200 GPM
D = 16"
S (Minimum submergence) = 44.7"
Q = 1000 GPM
D = 16"
S (Minimum submergence) = 25"
RE: vortex breakers
On the above links... it states that Cross type vortex breakers dont work.
Why dont they work and what is that basis ?
RE: vortex breakers
A vortex braker is to avoid the swirling of the flow and air bobbles which can damage the suction pump impeller. The vortex breaker transforms a big vortex into smaller vortexes to protect the suction pump
Luis marques
RE: vortex breakers
One design is a crossed plate inserted into the throat of the outlet pipe in a tank; the length of which is roughly 1.5 times the diameter. This setup is typically used if the outlet pipe is on the side of a tank. A design guide is listed in ANSI/HI 1.1-1.5-1994 Centrifugal pumps for Nomenclature, definitions, applications and Operation. No design dimensions are given.
If the outlet from a tank is on the bottom, a baffle plate can be placed over the mouth of the pipe. Installing the baffle plate above the pipe opening will simulate a larger intake area, thereby reducing the vortex and air entrainment.
The paper that can be accessed at the link below indicates that the cross type vortex breakers do not work and provides some practical experience with vortex breakers:
A flat plate vortex breaker will simulate the function of a pipe reducer and therefore reduce the velocity into the outlet pipe. The cross vortex breaker probably functions as a flow straightener and is not that effective at reducing fluid velocities (and vortexes).
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