Modeling of combustion processes in cylindrical chambers using modern package programs

The main problem of mathematical modeling of gas fuel combustion processes within the framework of the ANSYS Fluent software package is the choice of a turbulence model. As part of the study, to describe the turbulence phenomenon, the standard and modified k − ε models, the Spalart-Allmaras model, the k − ε model and the RNG k − ε model were tested for describing the mixing and combustion of methane in a cylindrical channel according to the Arrhenius law. The control volume method embedded in ANSYS Fluent was used in the calculations, where the velocity and pressure fields are linked by the PISO algorithm. A satisfactory agreement between the results of calculation and experiment was obtained when implementing the modified k − ε model by the axial distribution of temperature and longitudinal velocity.

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