Numerical simulation on flow, combustion and heat transfer of ethylene cracking furnaces
Numerical simulation on flow, combustion and heat transfer of ethylene cracking furnaces
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DOI：
10.1016/j.ces.2010.12.028
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发表时间：
2011-04
影响因子：
4.7
通讯作者：
Huang Guihua;Wang Honggang;Q. Feng
中科院分区：
文献类型：
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作者：
Huang Guihua;Wang Honggang;Q. Feng
以100 kt/a SL-Ⅱ型乙烯裂解炉为研究对象，采用计算流体力学（CFD）方法对裂解炉内的流动、燃烧、辐射传热和热裂解反应过程进行了耦合模拟研究。湍流模拟采用标准k-ε双方程模型。采用有限速率/涡耗散模型对底部燃烧器的非预混燃烧和侧壁燃烧器的预混燃烧进行了模拟。采用离散纵标（DO）模型对炉膛辐射传热进行了数值模拟。模拟结果给出了炉膛内速度场、温度场和浓度场的详细信息，以及反应器管壁热流密度的分布。为裂解炉几何结构和操作参数的优化提供了理论依据。
With the study object of an 100kt/a SL-II ethylene cracking furnace, this paper used Computational Fluid Dynamics (CFD) method to carry out coupled simulation studies on the flow, combustion, radiative heat transfer and thermal cracking reaction processes in the cracking furnace. The standard k–ε two-equation model was applied to turbulence simulation. The finite-rate/eddy-dissipation model was used for modeling of non-premixed combustion of the bottom burners and premixed combustion of the sidewall burners. The Discrete Ordinates (DO) model was applied to the simulation of radiative heat transfer of furnace. The simulation results show the detailed information about velocity, temperature and concentration fields in the furnace and heat flux distribution on the reactor tubes skin. This work will provide a theoretical basis for the optimization of the geometrical structure and operational parameters of the cracking furnace.