Flow Through A Rectangular Slot
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Calculating Pressure Drop - Rectangular Orifice
The block models a variable orifice created by a cylindrical sharp-edged spool and a rectangular slot in a sleeve. The flow rate through the orifice is proportional to the orifice opening and to the pressure differential across the orifice. The flow rate is determined according to the following equations. As flow through a rectangular slot is a particular case of flow through a large orifice, any understanding of it will help in its generalization. Furthermore, because the flow through a slot is intermediate to that of a sluice gate and a rectangular sharp-crested weir, it can be used as a basis of unification.
Flow Through A Rectangular Slotted
Flow Through A Rectangular Sloth
Air Flow Through Rectangular Slot
Calculating Pressure Drop - Rectangular Orifice
I have a rectangular duct measuring 80' x 40', containing a 1/4' thick orifice plate with a rectangular opening size of 70' x 28'. I have air flowing at 100,000 CFM through the duct at 40' W.C. static pressure.
I am trying to calculate the pressure drop across this orifice. The only equations I can find are for circular orifices in a circular pipe. As I don't need a 100% accurate calculation, I was thinking of converting the rectangular areas to their equivalent circular areas and using the standard equations.
Is this an acceptable approach? Does anyone have an equation for rectangular orifices they can provide?
Thanks.
I am trying to calculate the pressure drop across this orifice. The only equations I can find are for circular orifices in a circular pipe. As I don't need a 100% accurate calculation, I was thinking of converting the rectangular areas to their equivalent circular areas and using the standard equations.
Is this an acceptable approach? Does anyone have an equation for rectangular orifices they can provide?
Thanks.