A Large-Eddy Simulation–Linear-Eddy Model Study of Preferential Diffusion Processes in a Partially Premixed Swirling Combustor With Synthesis Gases

Li, Shaoshuai and Zheng, Yunzhe and Mira, Daniel and Li, Suhui and Zhu, Min and Jiang, Xi (2017) A Large-Eddy Simulation–Linear-Eddy Model Study of Preferential Diffusion Processes in a Partially Premixed Swirling Combustor With Synthesis Gases. Journal of Engineering for Gas Turbines and Power, 139 (3). p. 31501. ISSN 0742-4795

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Abstract

A lean partially premixed swirling combustor operated with synthesis gases is studied using large-eddy simulation (LES). The linear-eddy model (LEM) is employed to close the unresolved scalar fluxes with the nonunity Lewis number assumption. Several terms resulting from the LES filtering operation are not modeled but directly resolved considering their unique length and time scales, such as molecular diffusion, scalar mixing, and chemical reactions. First, the validation results on a well-established jet flame indicate a good level of correlation with the experimental data and allow a further analysis of syngas combustion on a practical combustor. Second, the effects of preferential diffusion on the characteristics of flow and combustion dynamics on a lean partially premixed swirling combustor are investigated. The obtained results are expected to provide useful information for the design and operation of gas turbine combustion systems using syngas fuels.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Engineering for Gas Turbines and Power
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2202
Subjects:
ID Code:
82909
Deposited By:
Deposited On:
15 Nov 2016 15:08
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Aug 2020 03:25