Pipe Flow Calculations Forum

For laminar flow (Re<2300) flow rate will change with 4 power of diameter Q/Q1 = (D/D1)^4 For turbulent flow where friction factor is not depending on the Reynolds number flow rate will change with 2.5 power of diameter Q/Q1 = (D/D1)^2.5 Anyway, you can try with calculator at: http://www.pipeflowcal...

Can you draw some image about your injector?

Some picture will tell more ... Regarding the pipe sizes,... All calculations in "basic" fluid dynamics are based on the assumption that fluid is continuous, which is actually not true, but if the diameter is big enough than you are OK. Big enough means that diameter is bigger than the fre...

I still don't have calculator for this kind of problem but you can read theory at: Discharge through valves, fittings and pipes http://www.pipeflowcalculations.com/pipeflowtheory/discharge_through_valves_fittings_and_pipes.htm and for expansion factor Y please find formula for orifices at: Flow thro...

You must tell me the pressure difference from start to finish to calculate flow rate.
I think that 8 bar is on the start, and what do you have on the end - a tank or atmosphere or cylinder?

Here you have simple pressure drop calculator and it can be used to calculate water flow rate as well:
http://www.pipeflowcalculations.com/pre ... /index.htm

My opinion is the best solution is to have no car exhaust pipe at all if you want highest power :) Now as this is not a option, than you are trying to get close to it - which is pipe should be as big as possible, but, Flow through car exhaust is by no means stationary - it is oscillating with time v...

Yes, you are right on both...

For that height the pressure will be above evaporation point for the normal temperatures (20-30 OC). In order to start the circulation energy (head) on one side must be higher than energy (head) on the other. It can be achieved with pump or with level difference between two tanks. In the second case...

This problems in my opinion can be solved only by experiment.
Calculation is maybe possible but with very limited accuracy.

Maybe using numerical methods some better results can be obtained but again, some experiment is also required - that is what I think.