Recent content by Jerry U

  1. J

    Calculating CFM from PSI and C.S.A.

    Some of the suggestions are correct to some degree but you cannot convert CFH to psi that is mixing apples and oranges! However, there is a method often used to achieve a predetermined flow that is called “choked flow.” It relies on the physical fact that gas cannot not exceed the speed of...
  2. J

    Effect of Downstream Pressure Fluctuations on Choked Mass Flow Rate

    Many years ago my fluid flow professor had this to say when I indicated I couldn't understand how the flow would not increase when the downstream pressure was lowered. He said think of it this way; "It would IF it knew the pressure was lower but the pressure wave that tells it the pressure is...