Flamelet: Rans of turbulent non-premixed flames
Hello im new in CFD,but im working with CFX 10 in a combustion problem.
Its a combustion chamber(tubular) of a turbine HITACHI, non premixed flames,natural gas-air. but im studing the concepts first,and i really want to know if ANSYS CFX specify FLAMELET use this assumptions for the avarage equations(FOR NON-PREMIXED TURBULEN FLAMES : 1.-the thermodynamic pressure is constant and MACH number is small. 2.- Species heat capacity are equal and constant (Cpk=Cp) 3.-Molecular difussion follows fick's law and molecular difussivities Dk are equal for all species (Dk=D) 4.-Lewis number ist equale to unity I know thats flamelet model use Lewis number=1 ,and fast chemestry,but the rest? and my second question if FLAMELET its a model who works with: Reaction rates-->infinitely fast chemestry? thanks very much Mauricio |
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