Flow rate through nozzle

[Fanie]

I was just wondering if you are able to help me with the following problem.

If you have a 8mm water spray nozzle with water pressure of 2.9bar. What would the flow rate through the nozzle be in cubic meters per hour?
How do you determine it?

I used nozzle flow rate equations and found the answer to be 3.5 cubic meters per hour.

Is this answer correct? It seems too much?

[admin]

For this problem you can use nozzle calculator at:
http://www.pipeflowcalculations.com/nozzle/.

For your data I have following results:

Nozzle calculator

2. diameter of nozzle throat (D2):
D2 : 8 mm

3. pressure in front of nozzle (p1):
p1 : 3.91325 bar

4. pressure after nozzle (p2):
p2 : 1.01325 bar

5. pressure drop (p1-p2):
p1-p2 : 290000.0 Pa

6. kinematic viscosity (ν):
ν : 1.006 mm2/s

7. dynamic viscosity (μ):
μ : 0.0010060001 Pas

8. density (ρ):
ρ : 1000 kg/m3

9. volume flow rate (q):
q : 4.3111105 m3/h

12. velocity in nozzle throat (V2):
V2 : 23.82413 m/s

14. Reynolds number in nozzle throat (Red):
Red : 189456.3

15. coefficient of discharge (C):
C : 0.9892325

As you can see flow rate of 4.3 m3/h is possible. Please note that I used pressure in front of nozzle of 2.9+1.01 bar = 3.91 bar absolute, and pressure after the nozzle of 1.01 bar - atmospheric.