A quick question on compressors
Reading ATPL-theory on gas turbines, Im trying to understand how the flow through the engine works. (I do understand it, just have a problem understanding how it is sustainable)
When you start your engine on a calm day, standing still at the tarmac, What makes the air flow so easily through, say your CFM56?
Air acts like current. It wants to balance inequal pressure and go from areas of higher pressure to areas of lower pressure until equal pressure exists. (taking the easiest way out)
So, once you start your engine and it achieves idle speed and is self sustainable,
the pressure in the compressor is higher than ambient atmospheric pressure on the outside. What makes it not flow the easiest way out?
Is it the velocity of air coming in the duct?