12 Replies Latest reply on Jan 25, 2013 2:00 AM by Jared Conway

    Transient Analysis Flow For Car Intake System

    Damien Kennedy

      Hi,

       

      I am designing an intake system for a single seater race car (central inlet - plenum - four outlet pipes).

      I have the model generated and have run steady state flow simulation (air entering inlet at velocity and dispersing, four outlets set at ambient pressure). The flow works fine but I need to set a time dependant pressure drop from the outlets.

       

      I specified everything as per this video on youtube http://www.youtube.com/watch?v=vIxK6K-XSGU
      and specified the dependancies on the outlet lids.

       

      I ran the simulation but the flow trajectory that returned was as if it was just showing the very last air flow path, straight to outlet no.4.

       

      What am I missing to get an animation of the complete cycle

       

      Attached is the excel data for the pressure drops and a picture of the intake system and the flow trajectiry that returned.