Flow through multiple orifices

[hazzac]

The water draining from a lake exits freely through a submerged orifice on a vertical wall at the bottom of the lake where discharge is
Q = Area of orifice * Discharge coefficient * (2*g*hydraulic head)^1/2

I need to add two more orifices at the same depth with the same area as the first. How would I find the discharge through the orifices?
Would I just use the combined area of all three orifices in the discharge equation?

 

[Artisi]

Surely each would be the same, therefore 3 x the flow - unless I'm missing something in your posting.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[hacksaw]

three times the flow as long as they are properly separated. You need to consult the standards in your area and be prepared to run CFD calculations.

 

[LittleInch]

A drawing would help.

Do you mean more side by side with no linkage between the orifices or in line?

Does adding more orifices change the downstream pressure?

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