- #1

KristianCE

- 2

- 0

I am trying to perform a calulcation to see if I may get cavitation problems for water flow and a specific orifice plate design. As I understand it cavitation occurs when the pressure at vena contracta is low enough to make the water boil.

My problem is that I do not know the pressure at vena contracta. I have a calulation including the inlet pressure, the remaining pressure loss, the dp across the orifice plate and the orifice plate discharge coeficient.

I assume that I can use the inlet pressure and subtract dp to get a value close to the vena contracta pressure. If possible I would like to find a better and more accurate solution and I would be very grateful for any ideas or pointers to sources of information