Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
A STUDY OF THE INFLUENCE OF TURBULENT INLET CONDITIONS IN A NUMERICAL SIMULATION OF A CYLINDRICAL COMBUSTION CHAMBER WITH A TURBULENT NON-PREMIXED METHANE-AIR FLAME
Submission Author:
Calisa Lemmertz , RS
Co-Authors:
Calisa Lemmertz, Felipe Roman Centeno, Cristiano Vitorino da Silva, Francis França
Presenter: Calisa Lemmertz
doi://10.26678/ABCM.ENCIT2018.CIT18-0051
Abstract
This work analyses the influence of turbulent inlet boundary conditions for numerical simulations of a cylindrical combustion chamber with a turbulent non-premixed methane-air flame. The problem is solved applying the finite volume method. The combustion model employed was the Eddy Break-Up-Arrhenius, with two-step global reaction mechanism. For turbulence, the standard k-ε model was considered. A mesh sensitivity study was performed to ensure the quality of the numerical results. The turbulent inlet conditions analyzed in this paper are the characteristic length of both fuel and oxidizer streams, and turbulence intensity for those same streams. The results obtained were compared to experimental data obtained by Garréton and Simonin (1994) to ensure their validity. This study showed the importance of a proper selection of turbulent inlet parameters in turbulent non-premixed methane-air flame simulations, while the turbulence intensity of the oxidizer proved to be the most significant of them.
Keywords
Turbulent combustion, characteristic length, Turbulence intensity, non-premixed methane-air flame
