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Difference between propeller and fan

  1. Feb 23, 2017 #1
    Good evening to all...I am troubling with a doubt that how a propeller differs from a fan regarding jet engines..
  2. jcsd
  3. Feb 23, 2017 #2


    Staff: Mentor


    In some respects, there isn't much difference, in other respects there are big differences.

    If you want a better answer, you'll have to ask a more specific question.
  4. Feb 23, 2017 #3
    Thank you
  5. Feb 23, 2017 #4
    How a turbofan jet engine differs from turbo prop jet engine?
  6. Feb 23, 2017 #5


    Staff: Mentor

  7. Feb 24, 2017 #6
    I'm just making an observation here which may or may not be the answer. A fan is stationary and displacing or moving a medium within its environment. A propeller isn't stationary. Its used to create movement by using a medium to displace itself. Putting the funky designs aside, both work by using rotational force on a wing design to create pressure differentials. Again I could be wrong but I think when the medium is the source of the applied force fans and propellers become turbines and impellers. An electric wind generator is a wind turbine, not a wind propeller.
  8. Feb 24, 2017 #7


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  9. Feb 24, 2017 #8

    jack action

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    These quotes from Wikipedia probably answer best your questions about propeller, turbofan and turbojet:
  10. Feb 24, 2017 #9
    Thank yoh
  11. Feb 24, 2017 #10


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    I'm wondering why household fans use fans instead of something like a propeller from a large radio control model. Perhaps there's an efficiency trade off depending on the goal (fan moves air, rotor generates thrust), and/or the desired output flow speed. One observation is that the propeller needs to rotate fast enough that air doesn't flow backwards between the propeller blades, while a fan blocks off most of any potential back flow between fan blades, allowing the fan to operate at a lower speed.
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