May 26, 2009 #1 Rpsfinest Electrical Joined Dec 8, 2006 Messages 29 Location US I am trying to calculate the steam flow through a fixed orifice of 2.125" diameter in a 3" pipe with an inlet pressure of 100 psig... Can anyone help?
I am trying to calculate the steam flow through a fixed orifice of 2.125" diameter in a 3" pipe with an inlet pressure of 100 psig... Can anyone help?
May 26, 2009 #2 TBP Mechanical Joined Mar 28, 2001 Messages 1,190 Location CA You'll need the downstream pressure. Once you know the pressure drop, and the orifice size, it's just plug the numbers into the formula. Upvote 0 Downvote
You'll need the downstream pressure. Once you know the pressure drop, and the orifice size, it's just plug the numbers into the formula.
May 26, 2009 #3 rmw Mechanical Joined Feb 6, 2002 Messages 5,724 Location US If by outlet pressure you are referring to the downstream pressure, you will need the upstream pressure and proceed as TBP recommends. rmw Upvote 0 Downvote
If by outlet pressure you are referring to the downstream pressure, you will need the upstream pressure and proceed as TBP recommends. rmw
May 27, 2009 #4 Zesti Mechanical Joined Jan 8, 2009 Messages 155 Location NL The velocity of gasflow through an orifice is limited to the speed of sound... Upvote 0 Downvote
May 29, 2009 #5 FredRosse Mechanical Joined Nov 3, 2004 Messages 131 Location US 115 psia inlet, nearly saturated steam 340F 3.068 inch pipe ID, inlet & outlet 2.125 inch sharp edged orifice Cd = 0.62 downstream pressure (PSIA) & resultant flowrate (LBm/hr) 114 3560 110 7,730 100 12,650 80 16,660 70 & less 17,300 Upvote 0 Downvote
115 psia inlet, nearly saturated steam 340F 3.068 inch pipe ID, inlet & outlet 2.125 inch sharp edged orifice Cd = 0.62 downstream pressure (PSIA) & resultant flowrate (LBm/hr) 114 3560 110 7,730 100 12,650 80 16,660 70 & less 17,300