The CH4 combustion model

• Autorzy: Kowalski J.
• Języki publikacji: EN

Abstrakty

EN

The paper presents results of research on the possibility of approximation of the results of calculations using the GriMech 3 kinetic mechanism by an artificial neural network (ANN). Application of kinetic mechanisms for modeling of combustion process in the finite element method requires considerable computing power which is associated with high costs of modeling. It is therefore necessary to seek alternative solutions in this area. The paper focuses on the possibility of application of ANN to approximate the total heat release from the combustion of methane. We built and trained ANN allows the approximation of the total heat release from the combustion process with a mean square error not exceeding 0.04% and the individual error for one result equal to 1.9%. Inputs for this model are the temperature and pressure of the combustion process and 52 mole fractions of chemical species in combusted mixture taken into account in the GriMech 3 kinetic model. For this reason, we tried to build and train the ANN approximating the mentioned mole fractions of chemical species. During the study we tested different configurations of ANN’s, containing different numbers of hidden layers and different numbers of neurons in the output and the hidden layer. The best results were obtained for the approximation of the ANN with one hidden layer containing 38 neurons. It was built and trained 52 ANN’s, one for each chemical species. Unfortunately, even for obtained small values of mean square errors of approximation, errors of individual results often exceed 100% of the results obtained from the kinetic calculations. For this reason, the application of ANN in the presented form to approximate mole fractions of chemical species is impossible.

Słowa kluczowe

EN

combustion process; model; combustion engines; methane; kinetic calculation; GriMech 3

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2010
• Tom: Vol. 5, no 1
• Strony: 95--102
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Kowalski J.

• Gdynia Maritime University, Department of Engineering Sciences Morska Street 81-87, 81-225 Gdynia, Poland tel.[phone], fax: [phone],

Bibliografia

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