I'm building a liquid rocket engine and we're using kerosene and oxygen as our propellent. Now my question is what pipe size should we use? My flow rate for kerosene is 0.160 Liters per second and we are planning to use a butterfly valve of 1.5 inch and for oxygen our flow rate is 12 L per second and we don't know which valve we should use for that.Also I want to throttle the propellents. I will be able to design the structure so that wouldn't be any problem
When designing with fluids (oil in pipes), we had some basic parameters to begin with:
return speed <= 0.5m/s
Supply speed 1.5 <> 7 m/s
However, the higher end creates more noise... so for certain environments / conditions that is not good.
You can evaluate your situation - higher speed = more losses and as you have flow rates you can work out some diameters of pipe. Once you have those then you can consider using common sizes - material choice etc