This question is related to the fans and compressors in jet engines.
(Please Note: I know how a propeller driven airplane works. The propeller has the shape of the airfoil and when this propeller moves through air, a pressure difference is created between the front and the back of the propeller. This causes the airplane to move forward)
Most of the fans that I have encountered till now merely recirculate the air in an enclosed area (for example: the ceiling fan recirculates the air already present in the room)
I am comfortable with the idea that fans recirculate air when they rotate. But my intuition is failing me when I think of fans (exhaust fans) that suck air out of an enclosed area.
The exhaust fan sucks out air from an enclosed area (ex: room). The fan in a jet engine sucks in air from outside into a enclosed area.
I would appreciate it if someone could explain how these fans manage to suck-in/suck-out air. Does it have anything to do with the shape/orientation of the blades of the fan?