Difference between revisions of "Auto-ignition CH 4/Air flame with scheme GRI12"
From orch
(Created page with "== '''Objectives''' == The AutoIgnition_GRI12 test case shows an example of CH4/Air auto-ignition using the GRI12 mechanism. == '''Key parameters''' == We are at atmospheri...") |
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== '''Key parameters''' == | == '''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. | + | 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) : | Characteristics of the premixed particule (Phi = 1) : | ||
| − | listInlets | + | 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. | ||
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| + | |||
| + | 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 | ||
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== '''Results''' == | == '''Results''' == | ||
===Compute Trajectories === | ===Compute Trajectories === | ||
| + | |||
| + | [[File:AutoIgnition_results.png|600px|center]] | ||
Latest revision as of 10:53, 30 April 2025
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
