Dampening of pressure pulses downstream of Centrifugal pump
Dampening of pressure pulses downstream of Centrifugal pump
(OP)
I have read about some issues on the subject but would like to gain more information.
By how much would the pressure pulses generated by vane pass of centrifugal pumps be dampened out as the fluid flows down the line ?
Is there any method to estimate or an empirical corelation ?
We normally caution our designers to consider the impact due to fluid pressure pulsations on piping and small bore connections immediately downstream of a main line centrifugal pump for crude oil pipelines (~ 30" dia., discharge pressure 9000 Kpa) but are not sure of the dissipation in energy say 50 km downstream.
Appreciate any help here.
By how much would the pressure pulses generated by vane pass of centrifugal pumps be dampened out as the fluid flows down the line ?
Is there any method to estimate or an empirical corelation ?
We normally caution our designers to consider the impact due to fluid pressure pulsations on piping and small bore connections immediately downstream of a main line centrifugal pump for crude oil pipelines (~ 30" dia., discharge pressure 9000 Kpa) but are not sure of the dissipation in energy say 50 km downstream.
Appreciate any help here.





RE: Dampening of pressure pulses downstream of Centrifugal pump
RE: Dampening of pressure pulses downstream of Centrifugal pump
I hate Windowz 8!!!!
RE: Dampening of pressure pulses downstream of Centrifugal pump
Damping: a decreasing of the amplitude of an electrical or mechanical wave.
RE: Dampening of pressure pulses downstream of Centrifugal pump
So to say that blade pass frequency is a non-event is not true.
Is this a theoretical or actual problem, is a problem more info will assist, if suffering from blade pass frequency - there are a few trick that can help to alleviate the problem.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Dampening of pressure pulses downstream of Centrifugal pump
RE: Dampening of pressure pulses downstream of Centrifugal pump
The concern here is that pressure pulses can cause vibration and worse - resonance in the piping system especially in attached small bore cantilever type connections e.g. instrument/ drains/vents as a result of the pulse resonating with the mechanical or acoustic natural frequencies.
As i see it the damping (corrected by dub) of thise pulse as it travels downstream can limit the severity of the impact.
RE: Dampening of pressure pulses downstream of Centrifugal pump
I hate Windowz 8!!!!
RE: Dampening of pressure pulses downstream of Centrifugal pump
any thoughts guys ?
RE: Dampening of pressure pulses downstream of Centrifugal pump