کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4916636 1428105 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Large eddy simulation of a semi-industrial scale coal furnace using non-adiabatic three-stream flamelet/progress variable model
ترجمه فارسی عنوان
شبیه سازی گردشی بزرگ یک کوره ذغالسنگ مقیاس نیمه صنعتی با استفاده از مدل فراملی سه بعدی بدون آدیاباتیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
To describe the combustion process in the burners with complicated configuration used in the industrial applications, a non-adiabatic three-stream flamelet/progress variable (FPV) model for simulating pulverized coal combustion (PCC) is proposed in the context of large eddy simulation (LES). A conserved scalar associated with oxidizer split is introduced to characterize mixing of different oxidizer streams while the manifold of enthalpy defect is incorporated to account for heat losses. As a first step towards real industrial applications, the present model is evaluated by simulating a semi-industrial swirl-stabilized pulverized coal flame. Qualitative analyses are first carried out to explore the details of the coal combustion behaviors in this complicated configuration burner. We find that the coal particle reaction is closely related to the distribution of the oxidizer split. In addition, the results show that the reaction in the swirl induced internal recirculation zone is mainly generated by homogeneous combustion while the heterogeneous reaction dominates in the downstream region. Quantitative comparisons among the present model, the eddy break up model and the experiments are also conducted. The results from the flamelet model agree well with the experimental data and outperform those from the eddy break up model. However, discrepancies still exist in species concentrations at certain area, which may be further improved by high-fidelity devolatilization model in the future study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 183, 1 December 2016, Pages 1086-1097
نویسندگان
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