I've googled around and can't find quite what I'm looking for.. this may be a VERY basic question, but I'd appreciate if it could be explained in layman's terms..
Traditional fuel injection engines have the ability to pressurize a fuel line to ~50psi.
Gasoline Direct Injection/Diesel engine fuel pumps can pressurize a fuel line to 30,000psi or more.
Power washers can pressurize water to 4,000psi +
but all these fluids are 'assumed to be incompressible'...
The explanation that the measured pressure is the force on external walls of a reservoir under pressure doesn't quite make sense to me, in that in order for a High-Pressure fuel reservoir to be under greater than atmospheric (30,000 psi) pressure, the fluid within must also be pressurized.
I don't understand!
I've read that the 'assumption' of incompressibility is not entirely true, but for a liquid to be compressible to 2000bar, the 'assumption' must be entirely false!?