Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Application of the SA Optimisation Method to the Correlated WMP Radiation Model for Flames
Submission Author:
Bruno Hartmann da Silva , RS
Co-Authors:
Bruno Hartmann da Silva, Isaias Machado, Fernando Pereira, Francis França, PAULO PAGOT
Presenter: Bruno Hartmann da Silva
doi://10.26678/ABCM.ENCIT2018.CIT18-0024
Abstract
The weighted-multi-point-source (WMP) model is an imminent alternative to detailed flame simulations when estimations of thermal radiation in both far and near fields are needed. However, despite its easier implementation, several parameters need to be set in order to guarantee the accuracy of the results. These parameters are still unknown and may depend on several variables, such as the fuel that is being burnt, the mass flow and the percentage of inert gas in the mixture. The large quantity of variables demands the use of an efficient method to determine these parameters based in experimental data. Previous studies used the Generalized Extremal Optimization (GEO) method to determine the best combinations of variables for the problem and correlate with flame parameters. This work aims to further explore the problem applying the well established Simulated Annealing (SA) algorithm and comparing the results to those offered by the GEO, assessing which is the best choice to the correlated WMP problem. It is used the same methodology of the compared paper, using a quadratic correlation between the variables (radiation fractions and sources weights) and the flame heat release rate. A total of 77 cases were studied and the results were analysed in a statistical study over 50 runs. The SA algorithm showed better results with similar average values of objective function, but lower best case values.
Keywords
Inverse problem, WMP, Combustion, Optimization, Simulated Annealing
