Imperial College London
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Luca Magri

Faculty of Engineering, Department of Aeronautics

Professor of Scientific Machine Learning
 
 
 
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Contact

 

l.magri Website

 
 
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Location

 

CAGB324City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Yu:2020:10.1016/j.proci.2020.06.137,
author = {Yu, H and Juniper, MP and Magri, L},
doi = {10.1016/j.proci.2020.06.137},
journal = {Proceedings of the Combustion Institute},
title = {A data-driven kinematic model of a ducted premixed flame},
url = {http://dx.doi.org/10.1016/j.proci.2020.06.137},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - © 2020 The Combustion Institute. Reduced-order models of flame dynamics can be used to predict and mitigate the emergence of thermoacoustic oscillations in the design of gas turbine and rocket engines. This process is hindered by the fact that these models, although often qualitatively correct, are not usually quantitatively accurate. As automated experiments and numerical simulations produce ever-increasing quantities of data, the question arises as to how this data can be assimilated into physics-informed reduced-order models in order to render these models quantitatively accurate. In this study, we develop and test a physics-based reduced-order model of a ducted premixed flame in which the model parameters are learned from high-speed videos of the flame. The experimental data is assimilated into a level-set solver using an ensemble Kalman filter. This leads to an optimally calibrated reduced-order model with quantified uncertainties, which accurately reproduces elaborate nonlinear features such as cusp formation and pinch-off. The reduced-order model continues to match the experiments after assimilation has been switched off. Further, the parameters of the model, which are extracted automatically, are shown to match the first-order behavior expected on physical grounds. This study shows how reduced-order models can be updated rapidly whenever new experimental or numerical data becomes available, without the data itself having to be stored.
AU  - Yu,H
AU  - Juniper,MP
AU  - Magri,L
DO  - 10.1016/j.proci.2020.06.137
PY  - 2020///
SN  - 1540-7489
TI  - A data-driven kinematic model of a ducted premixed flame
T2  - Proceedings of the Combustion Institute
UR  - http://dx.doi.org/10.1016/j.proci.2020.06.137
ER  -
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