Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Automatic Reduction For Chemical Kinetics Mechanism Through Laminar Flame Speed Sensitivity Analysis using Cantera.
Submission Author:
Alvaro Cesar Garcia , SP , Brazil
Co-Authors:
Alvaro Cesar Garcia, Rogério Gonçalves dos Santos
Presenter: Alvaro Cesar Garcia
doi://10.26678/ABCM.COBEM2021.COB2021-0494
Abstract
Due to the tightening of the emission laws, new studies and developments to improve combustion efficiency must be carried out. As a result of the complexity and high cost of implementing scientific experiments, many studies in a simulation are being developed. However, for a realistic approach to simulation, an equally realistic methodology is needed. Detailed chemical kinetics mechanisms are developed to supply this demand, but its use entails a substantial computational cost for 2D and 3D simulations combustion, making its use almost impossible. To reduce the computational costs, a reduction of chemical kinetics mechanisms is employed with the slightest compromise in the model's accuracy. This paper aims to present an automatic algorithm for reducing the chemical kinetics mechanism by analysing each chemical reaction's flame speed sensitivity using Cantera. The algorithm automatically selects the most sensitive reactions through a threshold of a difference between the original and the reduced mechanism. Its performance was compared to traditional methods. For comparison, the reduced mechanisms' accuracy, the total simulation time, and the time required to generate the reduced mechanism were considered.
Keywords
Automatic Mechanism Reduction, chemical kinetics, CANTERA, laminar flame speed, Sensitivity analysis
