- #1

Gustav Molin

- 8

- 1

Let's say we have a submerged pressure tank, constantly fed with air through a compressor, so it's maintained at a certain pressure P

_{tank}. The pressure tank has a hole in it at a known height from the surface, and with a known diameter, so that air will leak out. I want to calculate the volume air flow through the hole [m

^{3}/s].

Can I use the formula

P* = P

_{atm}+ rho*g*h

P

_{0}= the pressure in the tube (between 1 and 4 bar or something)

gamma = 1,4 for air

If the flow is proven to be choked, does this mean the air speed is 340 m/s through the hole? Can I then just multiply the speed with the area [m

^{2}] of the hole to get the volume air flow [m

^{3}/s]?I have tried using this formula but I can't seem to figure out C

_{d}.