Large eddy simulation of turbulent lifted flame in a hot vitiated coflow using tabulated detailed chemistry

被引:4
|
作者
Zhang, Hongda [1 ]
Yu, Zhou [2 ]
Ye, Taohong [2 ]
Zhao, Majie [2 ]
Cheng, Ming [1 ]
机构
[1] Aero Engine Corp China, Shenyang Engine Res Inst, Shenyang I10015, Liaoning, Peoples R China
[2] Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230027, Anhui, Peoples R China
基金
中国国家自然科学基金;
关键词
Turbulent lifted flame; Large eddy simulation; Chemistry tabulation; Copula method; PARTIALLY PREMIXED COMBUSTION; BLUFF-BODY BURNER; JET FLAME; HEATED COFLOW; CO-FLOW; STABILIZATION; MODEL; SPRAY; LES; DNS;
D O I
10.1016/j.applthermaleng.2017.09.110
中图分类号
O414.1 [热力学];
学科分类号
摘要
Large eddy simulation (LES) of Cabra flame is carried out by a sub-grid scale (SGS) model of tabulated detailed chemistry combined with presumed probability density function (PDF). The chemistry table is constructed by utilizing the coupling of auto-ignition model and premixed flame propagation model. The copula method is applied to build multivariate joint PDF of mixture fraction and reaction progress variable. LES transport equations for characteristic scalars, relevant sub-grid variances and covariance are deduced. The LES results show that the developed SGS model can give an accurate prediction for lift-off height and flame structures. The stabilization mechanism and combustion regime of Cabra flame are discussed. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1660 / 1672
页数:13
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