A computational study of a small-scale biomass burner: The influence of chemistry, turbulence and combustion sub-models

被引：35

作者：

Farokhi, Mohammadreza ^{[1
]}

Birouk, Madjid ^{[1
]}

Tabet, Fouzi ^{[2
]}

机构：

[1] Univ Manitoba, Dept Mech Engn, Winnipeg, MB R3T 5V6, Canada

[2] DBFZ Deutsch Biomasseforschungszentrum Gemeinnutz, Torgauer Str 116, D-04347 Leipzig, Germany

来源：

ENERGY CONVERSION AND MANAGEMENT | 2017年 / 143卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Biomass combustion; Grate firing; Steady flamelet model; Unsteady flamelet model; Eddy dissipation concept; COKE-OVEN GAS; NUMERICAL-SIMULATION; MULTIPHASE COMBUSTION; PULVERIZED COAL; REACTING FLOW; NO FORMATION; LAMINAR; CFD; MECHANISMS; STABILITY;

D O I：

10.1016/j.enconman.2017.03.086

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper presents a computational study to evaluate the influence of turbulence and combustion models as well as chemistry schemes on the combustion of a 8-11 kW small lab-scale biomass furnace. The analysis is conducted in the zone above the bed (freeboard) where the volatiles are burned. The turbulence models tested are standard k-epsilon, RNG k-epsilon and Realizable k-epsilon; and the combustion models are SFM (Steady Flamelet Model), UFM (Unsteady Flamelet Model) and EDC (Eddy Dissipation Concept). In addition, several chemical mechanisms with different complexity (reduced and detailed chemical kinetics) are considered. The predictions of the velocity, species, and temperature fields are compared with their counterparts' experimental measurements. The present findings reveal that all tested combustion models (SFM, UFM and EDC) are capable of predicting temperature and major species profiles; whereas only EDC is able to reliably predict slow-chemistry species. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：203 / 217

页数：15

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