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Explore Artificial Neural Networks for Solving Complex Hydrocarbon Chemistry in Turbulent Reactive Flows by Jian An; Fei Qin; Jian Zhang; Zhuyin Ren is a Engineering article available to read on EtoBox.

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Global warming caused by the use of fossil fuels is a common concern of the world today. It is of practical importance to conduct in-depth fundamental research and optimal design for modern engine combustors through high-fidelity computational fluid dynamics (CFD), so as to achieve energy conservation and emission reduction. However, complex hydrocarbon chemistry, an indispensable component for predictive modeling, is computationally demanding. Its application in simulation-based design optimization, although desirable, is quite limited. To address this challenge, we propose a methodology for representing complex chemistry with artificial neural networks (ANNs), which are trained with a comprehensive sample dataset generated by the Latin hypercube sampling (LHS) method. With a given chemical kinetic mechanism, the thermochemical sample data is able to cover the whole accessible pressure/temperature/species space in various turbulent flames. The ANN-based model consists of two different layers: the self-organizing map (SOM) and the back-propagation neural network (BPNN). The methodology is demonstrated to represent a 30-species methane chemical mechanism. The obtained ANN model is a

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Author

Jian An; Fei Qin; Jian Zhang; Zhuyin Ren

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)