Online-CPD-Coupled Large-Eddy Simulation of Pulverized-Coal Pyrolysis in a Hot Turbulent Nitrogen Jet

被引：20

作者：

Wan, Kaidi ^{[1
,2
,3
]}

Xia, Jun ^{[1
,2
]}

Wang, Zhihua ^{[3
]}

Wrobel, Luiz C. ^{[1
]}

Cen, Kefa ^{[3
]}

机构：

[1] Brunel Univ London, Dept Mech Aerosp & Civil Engn, Uxbridge, Middx, England

[2] Brunel Univ London, Inst Energy Futures, Uxbridge, Middx, England

[3] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou, Zhejiang, Peoples R China

来源：

COMBUSTION SCIENCE AND TECHNOLOGY | 2017年 / 189卷 / 01期

基金：

中国国家自然科学基金; 英国工程与自然科学研究理事会;

关键词：

Chemical percolation devolatilization; Large-eddy simulation; Pulverized coal; Pyrolysis; NUMERICAL-SIMULATION; INFLOW CONDITIONS; SOLID PARTICLES; COMBUSTION; MODEL; FLAME; DEVOLATILIZATION; DROPLET; FLOW; VALIDATION;

D O I：

10.1080/00102202.2016.1193498

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The pyrolysis characteristics of pulverized-coal particles in a hot turbulent nitrogen jet were investigated using large-eddy simulation (LES). In the present study an advanced pyrolysis model, the chemical percolation devolatilization (CPD) model, has been incorporated into LES in real time. The simulation results of the developed online-CPD-coupled LES were used to calibrate the kinetic parameters of the conventional single first-order reaction model (SFOM). Through the comparison between the CPD-coupled LES and the LES using the SFOM model, the CPD-coupled LES approach is found to be able to give a better prediction on particle pyrolysis in the high-temperature turbulent flow. Finally, the effects of important parameters, including the particle diameter, coal type, coal-feeding rate, carrier-phase velocity, and pyrolysis temperature, on the pulverized-coal pyrolysis process were investigated through parametric studies using the online-CPD-coupled LES method.

引用

页码：103 / 131

页数：29

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