Steam Nozzle/orifice flow calculations

[WAMech]

Hi,

I'm trying to find a way to calculate the flow through some steam nozzles. I know the temperature, pressure and flow rate available in the supply and I need to calculate the same for flow through a simple blank cap that has had three holes drilled in it. The cap is flowing directly to the atmosphere and there are 5 of these on the line.

Been searching for this for ages and had no joy. Though I would give here a try as I have found useful answers on here a few times in the past!

Thanks in advance.

 

[hacksaw]

any restriction orifice calc will work, Marks H. B., Crane, and a dozen other sources that are more recent, many suppliers also have resources you can draw on if you contact them

 

[TD2K]

Have you got a copy of Crane or have access to a copy?

 

[rutherford703]

For simplified calculation, see Crane 410 page 2-14 for gases and vapors:
Q=Y*C*A*sqr(2*g*deltaP/density)
Y and C can be found at A-21 and A-20, respectively.

 

[WAMech]

Got it! Thanks for your help.