3 replies to this topic

[asade abiodun]

Hi,

I need information on how to generate the relationship between irregular shape to standard orifice size. I want to use in calculating the flow of fluid through the orifice.

I would appreciate urgent responce.

Thanks

[Steve McGahey]

I remember trying to work out the flow through a perforated plate.

It was the same as the flow through a single-orifice of the same flow-area - that was according to Miller, I think. Miller or Crane.

So, I think you could just work out the flow area (eg find a circle with the same area as your irregular shape) and go from there.

Anyone else?

- Steve.

Hi,

I need information on how to generate the relationship between irregular shape to standard orifice size. I want to use in calculating the flow of fluid through the orifice.

I would appreciate urgent responce.

Thanks

[proinwv]

Well I believe that there is more to it because as the ratio of the Circumference to Area becomes larger, the orifice becomes less efficient. Or, the "C" will decrease.

A literature search would give some insight into this effect and might help in making an initial estimate. But, regardless, I believe it can only be proven by testing.

[Profe]

Hi Asade

I think that you need estimate is the flow for an irregular hole.

Attached, the equation and example for gas flow, was extracted from GPSA Engineering Data Book, Section 3: Measurement , page 16: Pipe (Tube) Rupture – Gas.