Simple Flow from Nozzle? 1

[Krustynuts]

Trying to find the right formula for calculating flow (gpm) out of a nozzle to atmosphere with only knowing pipe pressure and nozzle orifice diameter? This seems like it would be simple, but it's been over 20-yrs since I took fluids!

Specifics are: water in 1/2" OD PVC tubing flowing through a 3/16" nozzle and a pump rated at 80 psi max. I'm not interested in full friction loss calculations, etc., just a simple ideal solution. The pump is rated at 1.25 GPM and I would like to make sure the nozzle can handle it. Do nozzles have curves associated with them like pumps?

 

[LHA]

Just use orifice flow, where v=sqrt(2*g*h)? Even though you want "ideal", I think it is unrealistically ideal to expect no exit losses. I would apply a Discharge Coefficient, and they range from 0.6 to 0.98...maybe use 0.8 to be conservative, but the manufacturer should be able to supply the Cd.

Engineering is the practice of the art of science - Steve