Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
IMPLEMENTATION OF HEAT LOSS MODELING FOR LAMINAR DIFFUSION CH4 FLAMES IN THE FGM METHOD
Submission Author:
Fredherico Rodrigues da Silva , RS
Co-Authors:
Fredherico Rodrigues da Silva, Cristian Alex Hoerlle, Andre Carlos Contini, Fernando Pereira
Presenter: Fredherico Rodrigues da Silva
doi://10.26678/ABCM.COBEM2019.COB2019-0685
Abstract
This study aims to implement and explore the inclusion of heat loss in the Flamelet Generated Manifold (FGM) method for the solution of non-premixed laminar methane diffusion flames. The manifold will be generated by taking into account the combustion progress variable, the mixture fraction and heat loss effects modeled through the enthalpy defect technique. In this approach, the manifold is constructed with sets of flamelet solutions employing varying levels of enthalpy defect. This is achieved by, at a first moment, decreasing boundary temperatures, and later by manipulating boundary mixture compositions in the counterflow diffusion flamelets. The adiabatic solution is accounted for an enthalpy defect equal to zero. By having a satisfying number of flamelet sets, the 3D manifold can be constructed and thermochemical data can be retrieved. The steps needed for the generation of flamelets with constant enthalpy defect are described and a reduced manifold is constructed. Results are compared to the detailed solutions employing the DRM19 chemical kinetics mechanism.
Keywords
FGM, Non-Adiabatic, Enthalpy-Defect, Diffusion Flames, laminar flow
