scienc
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Hi,
I've been trying to calculate the diameter for an orifice plate so that when inserted in a pipe it restricts the mass flow to the value I want (1.5 kg/s of compressed air, total pressure= 400 psia, T=300K). So essentially I am trying to design a choke plate. When a flow goes across an orifice plate, does the total pressure drop ? I can understand that the static pressure drops and velocity increases. But I simply can't get why the total pressure has to drop. Does it have something to do with momentum losses ?
Answering this would really help me sort out my confusion.
Thanks
N
I've been trying to calculate the diameter for an orifice plate so that when inserted in a pipe it restricts the mass flow to the value I want (1.5 kg/s of compressed air, total pressure= 400 psia, T=300K). So essentially I am trying to design a choke plate. When a flow goes across an orifice plate, does the total pressure drop ? I can understand that the static pressure drops and velocity increases. But I simply can't get why the total pressure has to drop. Does it have something to do with momentum losses ?
Answering this would really help me sort out my confusion.
Thanks
N