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Venturi equations

  1. Jan 23, 2015 #1
    I want to make a leaf-vacuum using a leaf-blower.
    Does anyone know how I might calculate the pressures?
    Thanks! leaf.png
  2. jcsd
  3. Jan 24, 2015 #2
    The Bernoulli equation should get you started with estimates but you will eventually need some real numbers. Do you have a way to measure static pressure or flow rate?

    Could you simply pull a vacuum on the leaf container with the suction side of the blower? You would get more flow that way.
  4. Jan 27, 2015 #3
    Generally all vacuum cleaners/blowers have 2 points to connect the pipe. One for vacuum and one for blowing.
    Do you want this for academic purposes or for actually using on leaves?

    Like montoyas said, Bernoulli's equation will help you, but you need some numbers.
    Last edited: Jan 27, 2015
  5. Jan 28, 2015 #4


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    Staff: Mentor

    Leaf blowers often advertise their wind speed, so that and Bernoulli's equation is all you need.
  6. Jan 28, 2015 #5
    Thanks, I think just letting the leaves go thru a fan blade is the best way to go, and for that, I would buy not build... Thanks again!
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