DIY Leaf-Vacuum: Using Venturi Equations for Pressure Calculation

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SUMMARY

The discussion focuses on designing a DIY leaf-vacuum using a leaf-blower, emphasizing the application of Bernoulli's equation for pressure calculations. Participants highlight the importance of measuring static pressure and flow rate to achieve accurate results. It is noted that leaf blowers typically have dual connection points for suction and blowing, which can enhance performance. Ultimately, a suggestion is made to consider purchasing a commercial solution rather than building one from scratch.

PREREQUISITES
  • Understanding of Bernoulli's equation
  • Knowledge of static pressure measurement techniques
  • Familiarity with flow rate calculations
  • Basic principles of fluid dynamics
NEXT STEPS
  • Research methods for measuring static pressure in fluid systems
  • Learn about flow rate calculations using leaf blower specifications
  • Explore commercial leaf-vacuum options for comparison
  • Investigate advanced applications of Bernoulli's equation in practical scenarios
USEFUL FOR

Engineers, DIY enthusiasts, and anyone interested in optimizing leaf collection methods using fluid dynamics principles.

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I want to make a leaf-vacuum using a leaf-blower.
Does anyone know how I might calculate the pressures?
Thanks!
leaf.png
 
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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.
 
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:
Leaf blowers often advertise their wind speed, so that and Bernoulli's equation is all you need.
 
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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