Auto-ignition CH 4/Air flame with scheme GRI12

Objectives

The AutoIgnition_GRI12 test case shows an example of CH4/Air auto-ignition using the GRI12 mechanism.

Key parameters

We are at atmospheric pressure, and the fuel is injected in its gaseous form (no evaporation model). We are using the stochastic configuration and we follow only one premixed CH4/Air fluid particule for ignition. Note that a temperature set below 1400 will greatly lengthen computation time.

Characteristics of the premixed particule (Phi = 1) :

  listInlets:
 - # Inlet 0: Air
   Temperature: 1500
   Pressure: 1E+05
   MassFlowRate: 0.1
   # Xk: 
   Yk: CH4:0.0948597, O2:0.190233, N2:0.714907
   EvaporationModel: false
   DropletDiameter: 0.0
   EvaporationTime: 0.0
   LiquidDensity: 0.0
   EvaporationLatentHeat: 0.0
 - # Inlet 1: Fuel
   Temperature: 450
   Pressure: 1E+05
   MassFlowRate: 0.17
   Xk: CH4:1.0
   # Yk:
   EvaporationModel: false
   DropletDiameter: 0.0
   EvaporationTime: 0.0
   LiquidDensity: 0.0
   EvaporationLatentHeat: 0.0

Characteristics of the burned gases inlet : (This inlet should always be present as it defines the mixing time, the time step and the iteration number.) It is crucial that the mass flow rate of any inlet is always different from 0 even if in this case "BurnedGases" is set to false to not consider this inlet.

InletBurnedGases:

 Temperature: 1000
 Pressure: 1E+05
 MassFlowRate: 0.1
 Xk: N2:0.76308, O2:0.093573, H2O:0.072355, CO2:0.070468
 # Yk:
 EvaporationModel: false
 DropletDiameter: 0.0
 EvaporationTime: 0.0
 LiquidDensity: 0.0
 EvaporationLatentHeat: 0.0

 MixingTime: 10000
 TimeStep: 1e-05
 IterationNumber: 150000
 BurnedGases: false
 EMST: true

Results

Compute Trajectories