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Consecutive fans

  1. Jul 30, 2005 #1


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    If you have two hurricane fans, and place them one after another, both blowing the same direction, will the air from the front fan be twice as fast?
  2. jcsd
  3. Jul 31, 2005 #2


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    Gold Member

    Well, I don't know what a hurricane fan is, but the answer is no.

    The speed of the second fan relative to the air will not cause the air to speed up twice as much.
  4. Jul 31, 2005 #3
    Dave is right. When you have equal characteristics fans(i.e equal head and flowrate) series arrangement gives you the capacity of a single fan but head gets doubled. Parallel arrangement gives you double the capacity of a single fan but head remains same.
  5. Aug 3, 2005 #4
    The fan speed will not increase by putting one behind another, but by putting them next to each other will create a greater area covered and more of a "breeze" effect. Both Dave and quark were correct
  6. Aug 3, 2005 #5


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    Staff: Mentor

    Well, there was recently a thread where someone complained about water flow being used as an analogy for electricity. Well, here it is again: as others correctly said - parallel vs series configuration means more flow (amperage, flow) vs more pressure (voltage, head).

    edit: If you internalize this concept (that energy transfers/flows of all types are related), you'll be waaaaay ahead of the curve as an engineer.
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