Combustion 2008


In recent years, because attention has been concentrated on non-reacting flows, it must be admitted that the development of combustion modelling in PHOENICS has stagnated. Specifically:

Recently however attention to the problem are has been renewed, with the results that:

  • multiple fuel-supply streams can be handled;
  • solution for enthalpy can be abandoned; and
  • direct solution for temperature (i.e. TEM1 ) can be recommended for all circumstances.

    These developments involve:

    The extreme scenarios distinguished

    In order to simplify the simulation process where possible, it is useful to distinguish the following extreme scenarios:
    1. Adiabatic; mixed-is-burned; one fuel-bearing stream
    2. Adiabatic; mixed-is-burned; several fuel-bearing streams
    3. Adiabatic; mixed-is-burned; several different-fuel-bearing streams
    4. Non-adiabatic; mixed-is-burned; one fuel-bearing stream
    5. Non-adiabatic; mixed-is-burned; several fuel-bearing streams
    6. Non-adiabatic; mixed-is-burned; several different-fuel-bearing streams
    7. Adiabatic; finite reaction rate; one fuel-bearing stream
    8. Adiabatic; finite reaction rate; several fuel-bearing stream
    9. Adiabatic; finite reaction rate; several different-fuel-bearing stream
    These scenarios will be discussed individually, one-by-one. a. Adiabatic; mixed-is-burned; one fuel-bearing stream The solved-for variable which is relevant to combustion is MIXF, the mass fraction of material emanating from the fuel-bearing in-flow stream, whatever its state of chemical aggregation.

    Variables which it may be useful to store but not solve include:

    Relevant material constants are: