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Design of an 'open' venturi water pump

  1. Aug 31, 2015 #1

    For my study i'm making a specific design

    I'm trying to design a ballast chamber which i want to empty with a venturi pump

    I attached a schematic image of the idea

    Through pipe A a liquid is pumped with around 150m3/h through a 6'' pipe.
    The pipe is narrowed at the end, with a space between the narrowed part en the underside of the chamber.
    The idea is that the liquid from chamber '2' will be pulledbecause of the flow from 'A' trough the narrowing to 'C'.

    The whole chamber is located 2 meters under water level, so there will be a water pressure from underneath.
    There is an air hose that will add air to chamber '2' so it won't create a vacuum

    My question is: Does this idea even work (under water) and how can i calculate the sizes and volumes that will be pumped away from chamber '2'

    Thank you in advance!
    open venturi.PNG
  2. jcsd
  3. Sep 1, 2015 #2


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    Without specific details --- ?
  4. Sep 4, 2015 #3


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    Yorick22, Since you have only given very limited information about your total system, all that be said is that in principal with the right design, operating pressures etc you may be able to use a jet pump design to achieve what you want. However, as they say, the devil is in the details. In that respect I recommend that you visit the below website that can give you information and guidance on jet pump operating criteria.


    There are a number of other available online academic discussions regarding jet pumps but none get directly done to the basics of applying one.

    I am new to the forum so I hope posting a link to an established manufacturers technical information does not violate any of the forum rules.
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