Fluids

Fluids

Pre Defined Spray Combustion

    • vipinmundro
      Subscriber

      I am running a Spray combustion in fluent using DPM with an upstream pressure of 13 bar and downstream pressure 0.6 atm, i want to know whether the pressure build in this analysis is slow or not? After 1000 iterations, am getting pressure distribution with max as 0.8 bar, never reached 13 bar. I need some urgent help on this?

    • Rob
      Ansys Employee

      Why do you expect to see 13 bar in the system? Some images may help, as would an explanation of what you're modelling. 

    • vipinmundro
      Subscriber

      Computational domainFuel is DPM Injected, Oxidiser in vapour form: Chamber pressure is maintained at 13 bar and nozzle is expanded  with exit pressure  0.6 atm.

    • Rob
      Ansys Employee

      And the flow is 0.6bar when leaving the above domain? Or exhausts into a zone kept at 0.6 bar?

    • vipinmundro
      Subscriber

      flow is leaving at 0.6 bar

    • Rob
      Ansys Employee

      So, the system has a 12.4bar pressure loss? 

    • vipinmundro
      Subscriber

      yeah!

    • Rob
      Ansys Employee

      Check your inlet boundary conditions, but also your assumption on the unit operating conditions: 12.4bar is a huge loss in a system when you have to pressurise fuel & oxidant first. 

    • vipinmundro
      Subscriber

      yea i am injecting fuel & oxidizer at this pressures

    • Rob
      Ansys Employee

      How stable is it? 

Viewing 9 reply threads
  • You must be logged in to reply to this topic.