化工学报2019，Vol.70Issue(2)：450-459,10.DOI:10.11949/j.issn.0438⁃1157.20181129
乙烯裂解炉耦合模拟中湍流模型的影响分析
Impact of turbulence model in coupled simulation of ethylene cracking furnace
摘要
Abstract
The ethylene cracking furnace equipped with the bottom burner and the side wall burner is more and more widely used. Different combustion modes affect the turbulent flow state in the furnace. Considering the turbulent flow in the cracking furnace and the gas injection, the combustion and heat transfer are strong. The nonlinear coupling effect, for this purpose, explores the influence of different turbulence models in the cracking furnace/reactor coupling simulation is critical for the precise design and optimization of the cracking furnace. In this paper, a coupling simulation for a 100000 t industrial ethylene cracking furnace was carried out for different turbulence models. The turbulent flow model established by the standard k-ε model, RNG k-ε and Realizable k-ε model was evaluated by CFD numerical simulation. The simulation results of the three turbulence models are compared with the industrial data. The distribution of velocity, temperature and turbulence capacity in the cracking furnace is analyzed. The results show that the Realizable k-ε model is superior to the other two models in flame stability and reaction efficiency. And based on the Realizable k-ε turbulence equation, the calculation results of the heat flux and the outer wall temperature distribution of the furnace tube are closer to the actual working conditions.关键词
湍流/计算流体力学/数值模拟/乙烯裂解炉/反应器耦合Key words
turbulent flow/ CFD/ numerical simulation/ cracking furnace/ reactor coupling分类
化学化工引用本文复制引用
倪城振,杜文莉,胡贵华..乙烯裂解炉耦合模拟中湍流模型的影响分析[J].化工学报,2019,70(2):450-459,10.基金项目
国家杰出青年科学基金项目(61725301) （61725301）
国家自然科学基金重点项目(61333010) （61333010）
中央高校基本科研业务费资助(22221817014) （22221817014）
上海市自然科学基金项目(17ZR1406800) （17ZR1406800）
