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On the fan and comssorssor and turbine for that matter there are blades and they are also curved. Im already confused beucase the fan has blades but wouldn't it blow out air not suck in air? Why are there blades even on the compressor and turbine and why are they curved?


marked as duplicate by Carlo Felicione, Jan Hudec, Ron Beyer, fooot, SMS von der Tann Nov 1 '17 at 22:04

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    $\begingroup$ Are you asking why they're curved specifically (which involves aerodynamics) or why they're there at all (which would imply a question about how a jet engine actually works)? $\endgroup$ – TypeIA Nov 1 '17 at 19:53
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    $\begingroup$ "fan has blades but wouldn't it blow out air not suck in air"... One side of the fan sucks, the other side blows. If you were standing behind the fan, it would be blowing... Same with household fans, spray a mist behind the fan and you'll see it sucks air in and blows it out the other side. $\endgroup$ – Ron Beyer Nov 1 '17 at 20:58
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    $\begingroup$ What do you mean by curved? Are you referring to the twist that each blade has from the root to the tip where the angle at the root is greater than the angle at the tip of the blade? Or are you referring to the curve of the blade that makes it look like a little wing--the camber of the blade? $\endgroup$ – Devil07 Nov 1 '17 at 21:05
  • $\begingroup$ @RonBeyer but like a household fan if I spray a mist in front of it it will be blown away so I get confused by the fan of an aircraft, wouldn't it blow air away from it, why does it get sucked in and not blown out? $\endgroup$ – Itzyoboi Nov 2 '17 at 15:55
  • $\begingroup$ @Itzyoboi I'm not sure how else I can explain it, one side of the fan sucks, the other side blows. They mounted the fan such that the "blow" side is towards the engine, which means that when you look at the engine, you are looking at the "suck" side. If you could stand on the other side of the fan (inside the engine) you would feel quite a wind blowing at you from the fan... $\endgroup$ – Ron Beyer Nov 2 '17 at 16:20