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Type: Journal article
Title: Reconstructing temperature fields from OH distribution and soot volume fraction in turbulent flames using an artificial neural network
Author: Nie, X.
Zhang, W.
Dong, X.
Medwell, P.R.
Nathan, G.J.
Sun, Z.
Citation: Combustion and Flame, 2024; 259:113182-1-113182-12
Publisher: Elsevier
Issue Date: 2024
ISSN: 0010-2180
Statement of
Xiangyu Nie, Wei Zhang, Xue Dong, Paul R. Medwell, Graham J. Nathan, Zhiwei Sun
Abstract: We present a methodology based on artificial neural networks for reconstructing flame temperature fields from planar distributions of hydroxyl (OH) radicals and soot volume fraction in turbulent jet flames. A convolutional neural network was trained using planar images of flame temperature, soot volume fraction and OH simultaneously recorded with laser-based experimental methods. Then, the capacity and accuracy of the neural network on reconstructing flame temperatures were assessed for the flame conditions not only within the training domain but also out of it. The results showed that the supervised neural network can reconstruct instantaneous temperature fields to within ± 60 K for the flame conditions within the training domain, and to within ± 150 K for the flame conditions outside of the training domain. Probability density functions (PDF) of reconstructed temperature and the joint PDFs with OH signals and soot volume fractions also show good statistical agreement with experiments. This work has application in extending measurement techniques into regimes that are presently difficult to achieve, such as by obtaining the training data for temperature with established low-speed imaging methods and using the neural network method to predict temperature from high-speed imaging of the other two scalars.
Keywords: Flame temperature; Artificial neural network; Laser diagnostics; Turbulent flames; Soot; Scalar reconstruction
Description: Available online 15 November 2023
Rights: © 2023 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
DOI: 10.1016/j.combustflame.2023.113182
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Appears in Collections:Mechanical Engineering publications

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