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  • HIGH AIRFLOW OR HIGH STATIC PRESSURE, WICH USE ? (AXIAL AND CENTRIFUGAL FANS)

    Alvaro Vidaurreta

    Alvaro Vidaurreta

    @alvaro-cfeBcJ
    Updated: Oct 26, 2024
    Views: 1.6K

    Hi, I have a question about  fans.

    I need to use a fan for my carreer final proyect and im not sure what kind of fan use here. ( i have doubts about wich fan to use, high airflow fans or high static pressure fans).

    My project consist in levitate a ball(or any aerodynamic object) by air , the ball will be in a tube and the fan will woks with out dust or big particles( clear air ).

    There are fans that priorize air flow vs static pressure , and my question is wich type of fan i need to use here . ( I can use axial fans of centrifugal fans).

    The goal here is move a ""heavy"" object (the ball) so wich kind of fan will use you ?

    (I know that i need to aply bernuilli equation to know the force aply to the ball(and the drag equation later), but i dont know if i need high air speed/air flow or static ourtput pressure)

    Thanks and kind regards.

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  • Ramani Aswath

    Member • Jul 17, 2018

    Calculate the terminal velocity of the ball using:

    #-Link-Snipped-#

    If this velocity is v m/min, and the area of cross section of the tube is A m2, then the flow rate for the fan has to be more than A x v m3/min for the ball to levitate. Use Darcy–Weisbach equation to calculate the pressure drop that the fan should develop.

    <a href="https://www.ajdesigner.com/phpdarcyweisbach/pipe_darcy_weisbach_equation_head_loss.php" target="_blank" rel="nofollow noopener noreferrer">Darcy Weisbach Equations Formulas Calculator - Head Loss</a>

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