I wish to simulate the pressure drop of air going through a filter by the use of a multi-orifice plate. There are a number of flow rates that can exist but the pressure drop must stay the same for each of the flow rates. I need to know what total area of holes in the plate, is required for the different flow rates in order to achieve the same pressure drop. It is has been proven by test, that a plate with a certain area of holes, achieves the correct pressure drop for one particular flow rate. If the flow rate is doubled, is it likely that doubling the area of holes in the plate will achieve the same pressure drop?
I just need to gain a feel for what is going on, a rough rule of thumb or something, as the plates are going to be tested anyway. Is it likely that in assuming the above question (If the flow rate is doubled, is it likely that… etc. ) is true, I will have to close off some of the holes (decrease the hole area) or make new holes (increase the hole area)
The flow is turbulent air. To give you a rough idea of the figures; the pressure drop required is 1350Pa (plus or minus 100 or so), the flow rate is multiples of 0.25 m3/s. A hole area of 0.00573 sq.m has achieved the pressure drop of 1350 Pa with 0.25 m3/s proven by test.
I apologise for the long-winded nature of this question.
Many thanks for taking the time to read.
I just need to gain a feel for what is going on, a rough rule of thumb or something, as the plates are going to be tested anyway. Is it likely that in assuming the above question (If the flow rate is doubled, is it likely that… etc. ) is true, I will have to close off some of the holes (decrease the hole area) or make new holes (increase the hole area)
The flow is turbulent air. To give you a rough idea of the figures; the pressure drop required is 1350Pa (plus or minus 100 or so), the flow rate is multiples of 0.25 m3/s. A hole area of 0.00573 sq.m has achieved the pressure drop of 1350 Pa with 0.25 m3/s proven by test.
I apologise for the long-winded nature of this question.
Many thanks for taking the time to read.