期刊
COMBUSTION AND FLAME
卷 187, 期 -, 页码 30-41出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.combustflame.2017.08.012
关键词
Combustion; Nonlinear regression; Local regression; Low-dimensional manifolds; Principal component analysis
类别
资金
- European Research Council [714605]
- Federation Wallonie-Bruxelles via 'Les Actions de Recherche Concertee (ARC)'
- European Research Council (ERC) [714605] Funding Source: European Research Council (ERC)
Large kinetic mechanisms are required in order to accurately model combustion systems. If no parameterization of the thermo-chemical state-space is used, solution of the species transport equations can become computationally prohibitive as the resulting system involves a wide range of time and length scales. Parameterization of the thermo-chemical state-space with an a priori prescription of the dimension of the underlying manifold would lead to a reduced yet accurate description. To this end, the potential offered by Principal Component Analysis (PCA) in identifying low-dimensional manifolds is very appealing. The present work seeks to advance the understanding and application of the PC-transport approach by analyzing the ability to parameterize the thermo-chemical state with the PCA basis using nonlinear regression. In order to demonstrate the accuracy of the method within a numerical solver, unsteady perfectly stirred reactor (PSR) calculations are shown using the PC-transport approach. The PSR analysis extends previous investigations to more complex fuels (methane and propane), showing the ability of the approach to deal with relatively large kinetic mechanisms. The ability to achieve highly accurate mapping through Gaussian Process based nonlinear regression is also shown. In addition, a novel method based on local regression of the PC source terms is also investigated which leads to improved results. (C) 2017 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据