A computationally efficient approach for soot modeling with discrete sectional method and FGM chemistry

被引:6
作者
Kalbhor, Abhijit [1 ]
Mira, Daniel [2 ]
van Oijen, Jeroen [1 ,3 ]
机构
[1] Eindhoven Univ Technol, Dept Mech Engn, NL-5600 MB Eindhoven, Netherlands
[2] Barcelona Supercomp Ctr BSC, Placa Eusebi Guell 1-3, Barcelona 08034, Spain
[3] Eindhoven Inst Renewable Energy Syst EIRES, NL-5600 MB Eindhoven, Netherlands
基金
欧盟地平线“2020”;
关键词
Flamelet generated manifold; Discrete sectional methods; Soot formation; COUNTERFLOW DIFFUSION FLAMES; SIZE DISTRIBUTION FUNCTION; PREMIXED FLAMES; COMBUSTION; SIMULATION; GROWTH;
D O I
10.1016/j.combustflame.2023.112868
中图分类号
O414.1 [热力学];
学科分类号
摘要
A novel approach for the prediction of soot formation in combustion simulations within the framework of discrete sectional method (DSM) based univariate soot model and Flamelet Generated Manifold (FGM) chemistry, referred to as FGM-CDSM, is proposed in this study. The FGM-CDSM considers the cluster-ing of soot sections derived from the original soot particle size distribution function (PSDF) to minimize the computational cost. Unlike conventional DSM, in FGM-CDSM, governing equations for soot mass frac-tions are solved for the clusters, by using a pre-computed lookup table with tabulated soot source terms from the flamelet manifold, while the original soot PSDF is re-constructed in a post-processing stage. The flamelets employed for the manifold are computed with detailed chemistry and the complete sectional soot model. A comparative assessment of FGM-CDSM is conducted in laminar diffusion flames for its ac-curacy and computational performance against the detailed kinetics-based classical sectional model. Nu-merical results reveal that the FGM-CDSM can favorably reproduce the global soot quantities and capture their dynamic response predicted by detailed kinetics with a good qualitative agreement. Furthermore, compared to detailed kinetics, FGM-CDSM is shown to substantially reduce the computational cost of the complete reacting flow simulation with soot particle transport. Primarily, the use of FGM reduces the overall calculation by about two orders of magnitude compared to detailed kinetics, which is advanced further with the clustering of sections at a low memory footprint. Therefore, the present work demon-strates the promising capabilities of FGM-CDSM in the context of computationally efficient soot calcula-tions and provides an excellent framework for extending its application to the simulations of turbulent sooting flames.& COPY; 2023 The Author(s). Published by Elsevier Inc. on behalf of The Combustion Institute.
引用
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页数:16
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