flow through a throat bushing

[Enkidu]

anyone have any theoretical info on calculating pressure drop across a throat bushing?
thanks in advance

 

[chief]

Flow (Q) gpm = 25 x cross sect.area(A)sq ins x 0.6 x sq rt diff head(ft). This will give you a close enough result for practical purposes

Offshore Engineering&Design

 

[Enkidu]

Thanks Chief.
curious - what's the 0.6?
bushing width?
regards

 

[chief]

The 0.6 is a constant K, depending on the width and shape of the orifice /throat.In this case I surmise the throat is a simple drilled thru' opening.

Offshore Engineering&Design

 

[texanman]

The flow coefficient K, can have a range of .5 to .85 depending on the hole geometry. However 0.6 is a good guess.

 

[texanman]

Flow coefficient K, can actually have wide range. But 0.65 is a good guess for a sharp hole flow restrictor. It is determined impirically.